JP2002136164A - Motor rotation speed control device and method, and recording medium - Google Patents

Abstract

(57) [Problem] To erroneously correct the rotation speed of a motor unit due to an unmeasurable state of the rotation speed of a moving medium such as a photosensitive drum, which can occur due to a boundary point between a pattern forming unit and a pattern break. Prevention without increasing costs. SOLUTION: A detection pulse signal is generated from a magnetic sensor 5 by a minute distance detection pattern section 4, and the rotation speed of the drum is determined for each minute distance amount based on the cycle of the detection pulse signal. If it is determined that it is longer than the predetermined time, the start point of the pattern break 4B is recognized. Then, if the start position timing of the pattern forming section 4A is determined, the total number of detected pulse signals is counted. Then, the rotation speed of the drum is determined for each minute distance amount, and the rotation speed of the motor is corrected until the count value reaches a predetermined number 15.
When the count value reaches a predetermined number, the interruption of the correction is executed until the start position timing of the pattern forming unit is recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor rotation speed control for controlling a rotation speed of a motor unit, and more particularly, to a motor rotation for accurately correcting the rotation speed of a motor unit which moves a moving medium such as a recording apparatus. The present invention relates to a speed control device and method, and a recording medium.

[0002]

2. Description of the Related Art Conventionally, a rotation speed of a motor unit for moving (rotating) a moving medium (for example, a photosensitive drum) provided in a recording device such as a printer or a copying machine is set in advance. The setting is controlled at a predetermined fixed rotation speed based on the specifications of the recording apparatus. Further, the rotation speed control of the motor unit is performed by executing the motor excitation at a motor excitation cycle time calculated from the motor rotation speed set in advance. That is, the rotation speed control of the motor unit is executed by the motor rotation speed control unit that excites the motor unit at a constant cycle corresponding to the predetermined elapsed time.

On the other hand, to cope with the motor torque fluctuation caused by the load fluctuation when the moving medium moves, the motor supply power as a rotary power source accompanying the motor excitation is changed in accordance with the motor torque fluctuation. By adjusting, that is, at the time of heavy load, the supply power is increased to increase the torque,
At the time of light load, the driving circuit (driver IC) of the motor unit is controlled so as to execute the rotation of the motor unit with a low torque by reducing the supplied electric power, thereby eliminating rotation speed unevenness due to external factors. .

[0004] As described above, conventionally, the rotation of the motor unit for moving the moving medium provided in the recording apparatus is performed at a preset motor rotation speed, and a preset constant period is set. The motor rotation speed is controlled by executing the motor excitation at a predetermined cycle time so that the motor rotation speed is controlled. The motor supply power control for adjusting the motor supply power is separately executed so that the number can be maintained. Then, the power of the motor rotation is transmitted as a moving motion of the moving medium at a predetermined ratio by a motor power transmitting unit such as a gear array, and the moving of the moving medium is executed.

[0005] The rotation speed of the conventional motor unit is determined based on specifications set for each recording apparatus.
A transmission coefficient such as a gear arrangement, which is a power transmission unit, and a motor rotation speed are set. In addition, the motor unit performs open-loop control in which the next excitation pattern is output from the motor excitation unit every predetermined time based on a set motor rotation speed, or the rotation speed is fed back by a tack signal of the motor itself, and a predetermined cycle time is output. By controlling either the closed-loop control that outputs the next excitation pattern from the motor excitation unit so that the motor unit rotates, the rotation speed amount of the motor unit is set to a constant speed. In other words, in the conventional apparatus, regardless of the type of the motor excitation unit using any of these control methods, by maintaining the rotation speed of the motor unit at a constant speed, the moving speed of the moving medium also becomes constant. It is configured assuming that it can be kept.

However, as described above, even if motor excitation control corresponding to a load change is executed by the motor excitation unit so that the rotation of the motor unit becomes a constant speed, the backlash component due to the gear arrangement, Due to the influence of external factors such as instantaneous load torque fluctuations on the moving medium, the moving medium cannot actually maintain a constant speed, and the moving speed on the surface (on the peripheral surface) of the moving medium becomes uneven. May occur. As a result of the occurrence of the speed unevenness, for example, when the moving medium is a photosensitive drum or the like of a recording apparatus, the moving rotational speed unevenness appears as it is in image printing unevenness (particularly, image unevenness called pitch unevenness), and image quality is deteriorated. Was causing the decrease.

In view of this, a pattern unit for detecting a minute distance of a stripe pattern is provided on the surface of the moving medium (on the peripheral surface, on the rotating surface) or on the surface of the auxiliary member corresponding thereto. The sensor unit detects the pattern moving along with the moving medium, calculates a unit speed value of the surface of the moving medium measured from a cycle time of the detected signal, and calculates the calculated unit speed value. And a set speed value of the moving medium, and a motor rotation speed correction unit for correcting the motor excitation cycle time based on predetermined conditions so that the unit speed value converges to the set speed value. By providing the motor rotation speed control device, the moving speed of the moving medium surface is maintained at a constant speed while being corrected at any time with the motor excitation cycle time corresponding to the measured current speed value. The emitted, it is beginning to be adopted in the recording device.

Further, the set value of the minute unit distance amount of the minute distance detecting pattern portion is, for example, a motor exciting portion of the motor exciting portion so that the motor rotational speed correcting portion can easily and accurately correct the set value. If the moving distance of a moving medium that moves in one excitation operation or a plurality of excitation operations is set, or when the moving medium is a photosensitive drum of a recording apparatus, 1
A predetermined distance amount, which is a preset movement unit, such as a line width distance amount or a distance amount that is an integral multiple of one line width, is employed.

[0009]

However, in the above-described conventional example, the set value of the minute distance amount included in the minute distance detection pattern portion is set to a value on a surface of a photosensitive medium or the like as a moving medium. Regardless of the length, since the distance is set to a distance of one line width or an integral multiple of one line width, there are the following points.

That is, since the entire length of the surface of a moving medium (rotary body) such as a photosensitive drum is not constituted by an integral multiple of the set value of the minute distance, the minute distance detecting pattern portion is provided by a sensor. This means that the detection unit consists of a pattern forming unit capable of detecting the minute distance amount and a sensor detecting unit that is not capable of detecting the minute distance amount. By the occurrence of this pattern break,
When the rotational movement of the photoreceptor drum or the like moves along the pattern break, it is naturally impossible to measure the movement speed for the minute movement distance, so that the rotation speed correction of the motor unit is interrupted. Normally, pitch unevenness of an image line caused by unevenness of the rotation speed of a photosensitive drum or the like gradually appears due to the inertia of the rotation force of the motor unit itself. With the distance amount of several lines to be interrupted, the pitch unevenness of the image line is hardly noticeable. In other words, when the rotational movement of the photoreceptor drum or the like is moving along the pattern break, the rotation speed correction of the motor unit is interrupted, and the motor unit is rotated by continuing only at the original set speed. Due to the inertia force of the motor rotation, the pitch unevenness of the image line is not noticeable at a small distance.

However, during the period from the boundary point when the minute distance amount is finally detected in the pattern forming section immediately before the start of the pattern break section to the time when it is recognized that the pattern break section has been moved, the rotation of the motor section is started. There is a point to be solved in the speed correction processing.

That is, conventionally, although a pattern break start judging unit for recognizing that the movement has been switched to the pattern break is provided, the cycle in the detection pulse signal from the sensor detector for detecting the minute distance amount is described. If the detection pulse signal is not detected even if the time is equal to or longer than a predetermined time, that is, a predetermined time that should recognize the next possible detection pulse signal, it is determined that the movement at the pattern break is started. It has only a pattern break start determination unit. Therefore, at the boundary time point at which the last detection pulse signal is detected at the end of the pattern forming section, it cannot be recognized that the next detection pulse signal does not exist. At this point, the motor rotation speed correction unit always determines that the rotation speed of the photosensitive drum or the like is a slow rotation at each end of the pattern forming unit, and determines that the rotation speed of the motor unit is related to the actual state. There is a point that the operation is corrected to the early rotation operation. Note that this operation situation occurs only for one line of the image at the end of the pattern forming unit, and thereafter, the correction of the rotation speed of the motor unit is interrupted by the pattern break start determination unit. Such a thing cannot happen.

As described above, in the prior art, the rotation speed of the motor unit is always increased by one image line every time the end of the pattern forming unit is determined, regardless of the actual rotation speed of the photosensitive drum or the like. If the rotational movement speed of the photosensitive drum is actually slow rotation, correct rotation is performed. If the rotational movement speed is actually a fast rotation, the addition correction in the reverse direction, in which the fast rotation correction is further performed, is performed. This latter operation situation intentionally corrects the rotation speed of the motor unit in the reverse direction, so that the image printed at the end of the pattern forming unit is a one-line noticeable misalignment, and a partial pitch unevenness. There is a problem to be solved, which may be a factor that degrades image quality.

On the other hand, there is provided a new sensor detecting section for specially detecting a pattern break, and a new pattern break start determining section for determining the end of the pattern forming section based on the detection of the new sensor detecting section. Is disadvantageous in that the cost of the apparatus itself, such as the cost of parts for the new part, increases.

The present invention has been made in view of the above points, and a first object of the present invention is to provide a rotating speed of a moving medium, such as a photosensitive drum, which can be generated by a boundary point between a pattern forming section and a pattern break. It is therefore possible to prevent erroneous correction of the rotation speed of the motor unit due to the unmeasurable state without increasing the cost.

In general, it is possible to control the rotation speed of the motor unit at a predetermined rotation speed while correcting the rotation speed by a closed loop control configuration. However, in the above-described conventional example, the rotation speed of the motor unit is reduced. It performs a rotation speed control of a motor for executing a rotation motion at a predetermined rotation speed and without rotation unevenness, and transmits the power of the predetermined rotation to a moving medium of a recording medium via a gear array which is a motor power transmission unit. Because of the open-loop control configuration, there were the following points to be solved.

First, due to the configuration of the recording apparatus, a certain load is always applied to the moving medium. If the moving medium is moved while the load is applied, an uneven external force is generated on the moving medium. This non-uniform external force is transmitted to the movement of the gear rotation of the gear array, which is the motor power transmission unit, and the movement of the rotation of the motor itself in accordance with the movement of the moving medium as a load change. This causes the speed value to fluctuate.

In order to maintain a predetermined number of revolutions, the motor is excited at predetermined time intervals set in advance, and the power supplied to the motor is adjusted, so that the influence of the external force transmitted to the movement of the rotational force of the motor is controlled. Offset (cancel) the load fluctuation of
Although it is configured to maintain a uniform and constant rotation speed, the gear arrangement, which is the motor power transmission section, has a gap originally set for meshing of gears, and if external force is applied to it, it is commonplace. As described above, the backlash component of the gear causes backlash, which instantaneously changes the rotation speed of the motor and can be transmitted to the moving medium.

Further, the gear rotation disorder due to the load fluctuation is transmitted as a swelling rotational movement to the moving medium, and the movement of the moving medium at the set movement speed value is slightly swelling. Speed irregularities may occur. Furthermore, the non-uniform external force applied to the moving medium sometimes accumulates the rotational power of the motor to a certain limit between the load and the load in contact with the moving medium and explodes at once, such as the so-called earthquake generation principle. In some cases, a condition is generated and instantaneous and intense load fluctuations are applied to the moving medium to disrupt the moving speed. In this case, the adjustment operation to the supply power described in the rotation speed control of the motor cannot follow, and even the rotation speed of the motor may be instantaneously changed. That is, the load fluctuation accompanying the movement of the moving medium sometimes affects the movement control of the moving medium with respect to the movement set speed value, and the movement speed is slightly changed.

An example of how the phenomenon that the moving speed of the moving medium fluctuates minutely due to an external force in a recording apparatus for forming an image will be described as an example of an electrophotographic apparatus which is a kind of a recording apparatus. An example is specifically described below.

One of a plurality of moving media present in an electrophotographic apparatus is a rotating moving medium called a photosensitive drum. The photoreceptor drum forms an image by executing an image forming process according to an already well-known electrophotographic process. In forming an image, a latent image that forms the most basic latent image is formed. The state of image formation in the process can greatly affect the quality of the image finally output from the electrophotographic apparatus. In the latent image process, a latent image is formed by irradiating a light beam (laser beam) blinking based on image information onto the photosensitive drum surface to generate a potential difference. Specifically, an image of a dot line row in the main scanning direction is formed by executing light irradiation according to image information by optical scanning at a predetermined timing based on a synchronization signal in the longitudinal direction of the photosensitive drum. Meanwhile, by rotating the photosensitive drum in the sub-scanning direction, which is the rotational movement direction, at a predetermined speed, which is a movement set speed value, the column spacing amount in which one dot line row formed in the main scanning direction is equally spaced And a latent image is formed.

The movement in the sub-scanning direction is performed by rotation of the photosensitive drum, which is performed by a motor unit and a motor power transmission unit. Therefore, the fact that the moving speed on the surface of the photosensitive drum as the moving medium slightly fluctuates due to the effect of external force means that the rotational speed of the photosensitive drum slightly fluctuates, and as a result, in the main scanning direction. This means that the desired rotational speed for arranging the formed one dot line rows at equal intervals may vary. In order to arrange the one-dot line rows formed in the main scanning direction at regular intervals, the rotation speed of the photosensitive drum needs to be constant, but the rotation speed of the photosensitive drum varies more than a certain degree. Exceeds the column spacing amount, line unevenness becomes noticeable. This line unevenness is what is called a pitch unevenness image. This pitch unevenness image is not only a halftone image but also a black and white
This is a great problem to be solved for a printing apparatus that remarkably degrades image quality even in dot images.

Further, when the recording apparatus outputs a full-color image composed of four primary-color composite images, even if the composite image is formed by aligning the image writing positions of the respective colors, pitch unevenness may occur in the middle of the image. In some cases, a color shift phenomenon may occur, which may result in a fatal decrease in image quality.

What has been described above is that in an electrophotographic apparatus,
This applies not only to the rotational movement of the photosensitive drums and photosensitive belts that form the latent image, but also to other moving media. In addition, the moving speed control of various moving media that requires high precision in the moving speed of the moving medium, such as the rotational movement of the transfer drum or the transfer belt serving as the medium for performing the synthesis of each color, requires that the moving speed fluctuate. There is a point that image quality may be affected.

Further, some recording apparatuses form an image directly on printing paper (recording material), such as an ink jet printer. High accuracy is required for the speed, and there is a possibility that the image quality may be affected if the moving speed of the moving medium fluctuates similarly to the above.

That is, in the printing apparatus, the accuracy of the actual moving speed of the moving medium itself is important for controlling the moving speed of the moving medium that controls the image formation. As far as the department controls,
There is a potential problem with conventional control arrangements that may affect the quality of the formed image.

In view of the above, a second object of the present invention is to variably adjust the actual moving speed of the moving medium of the recording apparatus for each minute distance or to set the actual minute moving distance of the moving medium. By feeding back the moving speed information to the rotational speed control means of the moving medium driving motor unit, the speed of the moving medium is corrected to converge to a predetermined moving set speed value, thereby reducing a so-called pitch unevenness image. Or to remove it.

As described above, in the above conventional example,
The set value of the minute unit distance amount included in the minute distance detection pattern portion installed on the surface of the moving medium or the like is easily corrected by the motor rotation correction unit regardless of the entire length (perimeter) on the moving medium surface or the like. It is configured with a predetermined distance amount, which is a preset movement unit, so that correction can be performed with high accuracy. in this way,
Since the total length on the moving medium surface or the like is not configured by an integral multiple of the predetermined distance amount, the pattern indicating the minute unit distance amount of the minute distance detecting pattern portion is located at any position on the moving medium surface or the like. It will break off. Since the set value of the minute unit distance is about several tens of micrometers, if the interruption is several patterns, the interruption of the correction by the motor rotation correction unit does not cause a serious problem, In order to practically manufacture a pattern portion for detecting a minute distance with a break within several patterns, advanced technology or an expensive manufacturing process is required, resulting in a significant increase in manufacturing cost. There are points.

In order to reduce the manufacturing cost, if the break portion of the small-distance detection pattern portion is set to several millimeters when manufacturing the fine-distance detection pattern on the surface of a moving medium, etc. The influence of the interruption of the correction of the motor rotation correction unit due to this increase appears.

In view of the above, a third object of the present invention is to correct the motor rotation correction unit even if the number of discontinuities in the minute distance detection pattern unit increases in order to reduce manufacturing costs. An object of the present invention is to prevent the adverse effect of the interruption or to interrupt the correction of the motor rotation correction unit.

[0031]

In order to achieve the above object, the invention according to claim 1 is directed to a recording medium driven by a motor means, on a medium surface in a moving direction of a moving medium, or on the medium. A minute distance detection pattern unit that displays a distance pattern in units of a minute distance amount set in advance on an auxiliary member corresponding to a surface; and the distance pattern is disposed at an arbitrary vicinity of the minute distance detection pattern unit. And a sensor detecting means for generating a detection pulse signal every time the moving amount of the moving medium moves the minute distance amount, and a pulse period amount of the detection pulse signal generated by the sensor detecting means is set to a predetermined time amount. A micro-distance moving speed determining means for performing a comparison determination or determining the phase period difference between the pulse period amount and a predetermined signal such as a synchronization signal of the recording apparatus; Motor rotation speed correction means for correcting a preset rotation speed value of the motor means based on the determination result of the movement speed determination means, wherein the motor means is provided each time the moving medium moves the minute distance. A motor speed controller that corrects the rotation speed value of the moving medium and corrects the convergence of the moving speed of the moving medium to a set speed value, wherein the minute distance detection pattern unit is capable of detecting the minute distance amount. The pattern forming section and a pattern break portion in which the detection of the minute distance amount is not possible, the minute distance moving speed determination means is configured to detect the pattern if the detection pulse signal from the sensor detection means is not detected for a predetermined time or more. The first to recognize that the passage of the break has started
Pattern break start determining means, detection pulse count means for counting the number of detection pulse signals from the sensor detection means, and passing of the pattern break portion when the count value of the detection pulse count means reaches a predetermined count value. A second pattern break start determining means for determining start of the pattern, and a detection pulse from the sensor detecting means after determining the start of the pattern break by the first or second pattern break start determining means. Pattern interruption end determining means for judging that the passage of the pattern interruption portion has ended when the signal is detected again, and the motor rotation speed correcting means comprises at least the second pattern interruption start judging means for detecting the pattern interruption. When the start of passage of the pattern is determined, the pattern interruption Until determining the passage end of the discontinuity, and having an interrupting correction interruption means the rotational speed correction of the motor means.

Here, the predetermined count value of the detection pulse counting means is a constant determined by the set number of the minute distance amounts existing in the entire length of the pattern forming portion provided in advance. Can be.

The predetermined count value of the detection pulse counting means is stored in total number storage means for storing the total number of the detection pulse signals with respect to the total length of the pattern forming portion counted by moving the moving medium in advance. It can be characterized in that the number of measurements is determined by a certain value.

The recording apparatus is an electrophotographic apparatus, and the moving medium corresponds to a photosensitive drum or a photosensitive belt in the electrophotographic apparatus, which moves by being driven by the motor means rotating at a predetermined speed. The sensor detecting means is a magnetic sensor, and reads a change in the magnetic material arrangement of S poles and N poles formed in the pattern forming portion of the minute distance detecting pattern means, and outputs the detection pulse. A signal is emitted, and the interval between the magnetic substance arrays is set in advance so as to be the minute distance amount and correspond to an integral multiple of the image line amount formed on the photosensitive drum. Can be characterized.

Further, the motor rotation speed correction means controls a predetermined moving speed of a transfer medium for temporarily recording and holding an image formed on the moving medium, and conveys a recording material output by the recording apparatus. The present invention is characterized in that it is effective for controlling the rotation speed of various motor means included in the electrophotographic apparatus as the recording apparatus, such as controlling a predetermined moving speed of a conveying means.

According to a sixth aspect of the present invention, the moving speed of a moving medium on which images are sequentially formed based on image information and which moves at a predetermined speed by a motor means is fixedly set in advance according to the specifications of the recording apparatus. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set in advance so that the movement set speed value is obtained, and the motor rotation excitation cycle time based on the movement set speed value of the moving medium is recognized. A motor excitation speed control device comprising: a next excitation instructing unit for instructing execution of the next excitation, and a rotation excitation executing unit for executing the next excitation of the motor unit by an output timing signal of the next excitation instructing unit. On the medium surface of the medium or on an auxiliary member corresponding to the medium surface, the entire length of the moving medium in the moving direction is divided at regular intervals along the moving direction, and the state changes for each distance amount. A pattern is provided so that the pattern is equally divided by an arbitrary constant value within a range of several tens to several hundreds of micrometers so that the fine movement distance can be detected. Pattern means,
A sensor detecting means for detecting a state change of each pattern of the minute distance detecting pattern means, and a cycle time measuring for counting a required time of a detection pulse cycle for each pattern detected by the sensor detecting means as the moving medium moves. Means,
Detection pulse speed calculation means for calculating a pulse cycle speed obtained by the sensor detection means from a minute detection distance amount preset in the minute distance detection pattern means and a cycle measurement time by the cycle time measurement means; and the sensor A moving speed determination comparing unit that compares the pulse cycle speed value calculated by the detected pulse speed calculating unit with the previously set moving set speed value of the moving medium for each pulse detected by the detecting unit; An excitation cycle time counting means for recognizing a motor rotation excitation cycle time based on the movement set speed value of the moving medium; and an excitation cycle time count based on predetermined conditions provided in advance according to a comparison result of the movement speed determination comparison means. Excitation cycle time correction means for correcting and correcting the count value set in the means, and correction by the excitation cycle time correction means. By transmitting the output timing signal of the next excitation instructing means to the rotation excitation executing means, the rotation speed of the motor means is changed with respect to the motor rotation excitation cycle time based on the movement set speed value. A motor rotation speed correction unit may be provided which accelerates or decelerates the time corrected by the cycle time correction unit.

Here, the predetermined condition provided by the excitation cycle time correction means is the predetermined fixed movement setting speed value as a reference of the moving medium and the detection pulse speed calculation means. As a result of comparing and judging the pulse cycle speed value with the moving speed judgment comparing means, when it is judged that the pulse cycle speed value is slower, the count value in the excitation cycle time counting means is reduced at a predetermined rate. The motor rotation excitation cycle time is accelerated to thereby accelerate and correct the rotation speed of the motor means. Conversely, when the pulse cycle speed value is determined to be faster, the excitation cycle time counting means is set. Setting the count value at a value increased by a predetermined rate, thereby delaying the motor rotation excitation cycle time to reduce the rotation speed of the motor means. It can be characterized in that there.

Further, the predetermined condition provided by the excitation cycle time correction means includes the pulse cycle speed value calculated by the detected pulse speed calculation means and the movement set speed value of the moving medium which is fixed in advance. The difference between the moving speed and the pulse period speed calculated by the detected pulse speed calculating means is determined by the moving speed determination. As a result of the comparison by the comparing means, when it is determined that the pulse cycle speed value is slower, the count value of the excitation cycle time counting means is subtracted from the count value by the calculation result value of the difference calculating means. The rotation speed of the motor means is accelerated and corrected by accelerating the motor rotation excitation cycle time. Conversely, the pulse cycle speed value is faster. If it is determined that, the count value in the excitation cycle time counting means is set to a value obtained by adding the count value to the result of calculation in the difference calculation means, thereby delaying the motor rotation excitation cycle time. The rotation speed of the motor means may be decelerated and corrected.

The predetermined condition provided by the excitation cycle time correction means includes the pulse cycle speed value calculated by the detected pulse speed calculation means and the movement set speed value of the moving medium fixed in advance. The difference between the moving speed and the pulse period speed calculated by the detected pulse speed calculating means is determined by the moving speed determination. As a result of the comparison by the comparing means, when it is determined that the pulse cycle speed value is slower, the count value of the excitation cycle time counting means is calculated from the count value by the difference calculation means by a predetermined value. The value is set to a value obtained by subtracting the value obtained by the ratio, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time. If it is determined that the periodic speed value is faster, the count value of the excitation cycle time counting means is set to a value obtained by adding the result of calculation by the difference calculation means to the count value by a predetermined ratio. In this case, the rotation speed of the motor means is decelerated and corrected by delaying the motor rotation excitation cycle time.

According to a twelfth aspect of the present invention, there is provided a recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein the moving speed of the moving medium on which an image is formed is reduced. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to be a movement set speed value fixed and set in advance in the specification of the recording apparatus, and the moving medium is used as a rotation speed control system of the motor means. Next excitation instructing means for recognizing a motor rotation excitation cycle time based on the moving set speed value and instructing execution of next excitation, and performing next excitation of the motor means by an output timing signal from the next excitation instructing means. A motor rotation speed control device having rotation excitation execution means, on a medium surface along the moving direction of the moving medium, or on an auxiliary member surface corresponding to the medium surface. In order to detect the minute movement distance of the medium surface, a pattern is sequentially formed with a unit detection distance interval amount having one unit as a minute distance amount obtained by multiplying the one dot distance amount of the image row in the moving direction of the moving medium by an integer. A pattern break is set with a distance interval equal to or greater than the unit detection distance interval with respect to a surplus distance that cannot be equally divided by the unit detection distance interval with respect to the entire length of the moving medium in the moving direction. Distance detection pattern means, sensor detection means for reading a change in the state of the pattern of the minute distance detection pattern means that moves with the movement of the moving medium, and the periodic phase of the detection pulse detected by the sensor detection means, When forming an image, the image synchronizing signal for instructing the image writing timing generated for each dot of the image sequence along the moving direction of the moving medium is transmitted to the unit. A moving medium speed determining means for determining a phase synchronization condition by comparing the generated line synchronization pulses of the periodic phase one dot distance of an integral multiple of the line synchronization pulse generating means set by the detected distance interval amounts,
An excitation cycle time counting means for counting a preset standard excitation time count value for recognizing a rotation excitation cycle time of the motor; and a standard condition set in advance based on a result of the moving medium speed determination means. Excitation cycle time correction means for correcting and correcting the excitation time count value, and correcting the count timing of the excitation cycle time count means to vary the phase of an output timing signal issued from the next excitation instruction means, thereby changing the rotation excitation. Motor rotation speed correction means for controlling acceleration / deceleration of the rotation speed of the motor means executed by the execution means for the time corrected by the excitation cycle time correction means.

Here, the moving medium speed judging means is provided with a first counting means for counting the detection pulse time every time the sensor detecting means detects, and a count value of the first counting means is preset. When the interruption time determination means determines that the detection pulse interruption determination time value has been exceeded, and when the interruption time determination means determines that the count value has exceeded a predetermined count value, the movement of the moving medium at the current state is determined as an interruption portion of the pattern configuration. Pattern break position determining means for determining that the moving medium is moving, and the excitation cycle time correction means is set in advance if the pattern break position determining means determines that the moving medium is moving at a break in the pattern configuration. As one of the predetermined conditions, the standard excitation time count value is set in the excitation cycle time counting means, and Motor rotational speed correction means may be characterized by temporarily interrupted the execution of the rotational speed correction control of the motor means.

Further, the moving medium speed judging means includes a second counting means for counting the number of image synchronization signals generated within a detection pulse period of the sensor detecting means, and a count value of the second counting means. A signal input number judging means for judging that the number of the image synchronizing signals generated within a certain detection pulse period exceeds a preset image synchronizing signal input number, and the signal input number judging means exceeds a predetermined count value. And a pattern break position determining means for determining that the current movement of the moving medium enters the break portion of the pattern configuration, and the pattern break position determining device moves the break portion of the pattern configuration. If it is determined that the medium is moving, the excitation cycle time correction means sets the excitation cycle time count as one of predetermined conditions. And setting the standard excitation time count value in the motor means, and the motor rotation speed correction means temporarily suspends execution of the rotation speed correction control of the motor means.

Further, in the state where the pattern break position determining means determines that the moving medium is not moving the break portion of the pattern configuration, one of the preset predetermined conditions executed by the excitation cycle time correcting means is as follows. Is compared with the synchronous phase of the detection pulse detected by the sensor detecting means, the moving medium speed determining means compares and determines the periodic phase of the line synchronous pulse in the line synchronous pulse generating means based on the image synchronous signal, When the moving medium speed determining means determines that the cycle phase of the detection pulse is later than the cycle phase of the line synchronization pulse, the excitation cycle time correction means adds the standard excitation time count value to the excitation cycle time counting means. A calculated value subtracted at a predetermined ratio is set, thereby shortening the motor rotation excitation cycle time, When the moving medium speed determining means determines that the cycle phase of the detection pulse is earlier than the cycle phase of the line synchronization pulse, the exciting cycle time correcting means corrects the exciting cycle. A calculation value obtained by adding the standard excitation time count value to the time counting means at a predetermined ratio is set, thereby delaying the motor rotation excitation cycle time to decelerate and correct the rotation speed of the motor means. Thereby, the rotation speed of the motor means is, relative to the motor rotation excitation cycle time based on the preset standard excitation time count value,
The apparatus may be characterized in that acceleration / deceleration is performed by the time corrected by the excitation cycle time correction means for each detection pulse detected by the sensor detection means.

Further, in a state where the pattern break position judging means judges that the moving medium is not moving the interrupted portion of the pattern configuration, one of the preset predetermined conditions executed by the excitation cycle time correcting means is as follows. The moving medium speed determination means compares and determines the periodic phase of the line synchronization pulse in the line synchronization pulse generation means based on the image synchronization signal with respect to the periodic phase of the detection pulse detected by the sensor detection means, When the required time of the detection pulse and the line synchronization pulse is measured, the difference time is calculated and calculated by the difference time calculation means, and when it is determined by the moving medium speed determination means that the detection pulse is later than the line synchronization pulse, The excitation cycle time correction means causes the excitation cycle time count means to calculate the difference time from the standard excitation time count value. A count value obtained by subtracting the difference operation time value calculated in the step is set, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time, and conversely, the moving medium speed determination means When it is determined that the detection pulse is earlier than the line synchronization pulse, the excitation cycle time correction means gives the excitation cycle time count means the difference calculation time calculated by the difference time calculation means from the standard excitation time count value. A count value obtained by adding the values is set, thereby delaying the motor rotation excitation cycle time to decelerate and correct the rotation speed of the motor means, whereby the rotation speed of the motor means is set in advance. A detection pulse detected by the sensor detection means with respect to the motor rotation excitation cycle time based on the standard excitation time count value Time period to be corrected by the excitation period time correction means, to be accelerated or decelerated it can be characterized to.

Further, in a state in which the pattern break position determining means determines that the moving medium is not moving the break portion of the pattern configuration, one of the predetermined conditions executed by the excitation cycle time correcting means is as follows. The moving medium speed determination means compares and determines the periodic phase of the line synchronization pulse in the line synchronization pulse generation means based on the image synchronization signal with respect to the periodic phase of the detection pulse detected by the sensor detection means, When the required time of the detection pulse and the line synchronization pulse is measured, the difference time is calculated and calculated by the difference time calculation means, and when it is determined by the moving medium speed determination means that the detection pulse is later than the line synchronization pulse, The excitation cycle time correction means causes the excitation cycle time count means to calculate the difference time from the standard excitation time count value. A count value obtained by subtracting a value corresponding to a predetermined ratio of the difference operation time value calculated in the step is set, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time, and conversely, When the moving medium speed determining means determines that the detection pulse is earlier than the line synchronization pulse, the exciting cycle time correcting means causes the exciting cycle time counting means to calculate the difference from the standard exciting time count value by the difference time calculating means. A count value obtained by adding a value corresponding to a predetermined ratio of the calculated difference calculation time value is set, thereby delaying the motor rotation excitation cycle time and decelerating and correcting the rotation speed of the motor means. The rotation speed of the motor means is controlled by the sensor relative to the motor rotation excitation cycle time based on the preset standard excitation time count value. Time period which detecting means is corrected by the excitation period time correction means for each detection pulse for detecting, that is accelerated or decelerated can be characterized.

In order to achieve the above object, the invention according to claim 20 is directed to a recording medium which is driven by a motor rotating at a predetermined speed set by the specification of the recording apparatus and moves on a medium surface along a moving direction of the moving medium. Alternatively, on an auxiliary member corresponding to the medium surface, a pattern forming portion capable of detecting a minute unit distance amount of the moving medium surface and a discontinuous portion which cannot detect a minute unit distance amount of the moving medium surface are configured. The minute distance detecting pattern means is disposed at an arbitrary position adjacent to the minute distance detecting pattern means, and the state change state of the pattern forming section and the discontinuous portion for each minute unit distance amount is converted into an electric signal. A sensor detecting means for detecting the interval of a predetermined time or more based on a periodic time amount of an electric signal emitted from the sensor detecting means; A break position determining means for determining, and a minute distance speed determining means for determining a unit speed for each minute unit distance amount by detecting an interval within the predetermined time based on a periodic time amount of an electric signal emitted from the sensor detecting means; A speed comparing means for comparing and judging a value of the unit speed for each of the minute distance amounts and a preset value of the set speed of the moving medium surface, and performing excitation at a preset motor excitation cycle time, A motor rotation speed correction unit that corrects the motor excitation cycle time based on a speed comparison result for each minute unit distance amount by the speed comparison unit; Alternatively, on the auxiliary member corresponding to the medium surface, at least two or more sets of the minute distance detection pattern unit and the sensor detection unit are provided. The mounting positional relationship of the micro-distance detection pattern means is configured such that the positions of the discontinuities of the micro-distance detection pattern means do not overlap each other along the moving direction of the moving medium, The motor rotation speed correction unit includes a detection signal selection unit that selects an electric signal generated from any one of the sensor detection units, and the motor rotation speed correction unit is based on the electric signal selected by the detection signal selection unit. The motor excitation cycle time is corrected based on the compared speed comparison result.

Here, the detection signal selection means has optional selection means for selecting any one of the plurality of sensor detection means when the motor means is started, and the interruption position determination means is provided with: Determining the position of the break based on the electrical signal selected by the arbitrarily selecting means; determining the start position of the break; immediately determining the electrical signal of another sensor detecting means of the plurality of sensor detecting means; The detection signal switching means, and the switching of the detection signal switching means enables the speed comparison means to execute the speed comparison of the unit speeds for each of the minute unit distance amounts, so that the motor rotation speed correction can be performed. The means may be characterized in that the motor excitation cycle time is corrected based on the speed comparison result from the speed comparison means being continued.

Further, the plurality of minute distance detecting pattern means have a positional relationship in which the position of each break is relatively positioned at a predetermined angle set in advance, and the detection signal selecting means comprises: When the motor means is activated, the motor means has optional selecting means for selecting any one electrical signal from the plurality of sensor detecting means, and the break position determining means is based on the electrical signal selected by the optional selecting means. Determining the position of the break, and immediately determining the start position of the break, first detection signal switching means for immediately switching to an electric signal of a sensor detection means located in the next order based on the predetermined angle; A time value calculated based on the entire length of the break formed by each minute distance detection pattern means is counted with respect to the entire length of the moving medium in the moving direction. When the counter means and the first detection signal switching means perform switching to the sensor detection means positioned in the next order, the subsequent execution of the switching is determined at the predetermined angle according to the passage of time of the counter means. Second detection signal switching means for switching to an electric signal of the next sensor detection means in order.
By means of the first and second detection signal switching means, the speed comparing means can execute the speed comparison of the unit speed for each of the minute unit distance amounts, so that the motor rotation speed correcting means is continued. The motor excitation cycle time may be corrected based on a speed comparison result from the speed comparison unit.

Further, a plurality of sets of the minute distance detecting pattern means and the sensor detecting means provided on the medium surface of the moving medium or on an auxiliary member corresponding to the medium surface are in one-to-one correspondence. A plurality of minute distance speed determining means, a break position determining means, and the speed comparing means, wherein the motor exciting means calculates the motor excitation calculated from a comparison result from the plurality of speed comparing means. Means for calculating an average value of each correction time of the cycle time is provided, and the motor rotation speed correction means performs correction as a correction time value of the motor excitation cycle time using a result of the average value calculation means. Can be characterized.

In order to achieve the above object, a twenty-sixth aspect of the present invention relates to a recording medium driven by a motor means on a medium surface along a moving direction of a moving medium built in the recording apparatus, or an auxiliary corresponding to the medium surface. On the member, a minute distance detection pattern means that displays a distance pattern in units of a minute distance amount set in advance, and disposed at any vicinity of the minute distance detection pattern means, to detect the distance pattern, A motor rotation speed control method for a motor rotation speed control device having a sensor detection means for generating a detection pulse signal each time the movement amount of the moving medium moves by the minute distance amount, wherein the detection pulse signal generated by the sensor detection means A comparison is made between the pulse period amount and a predetermined time amount, or a period phase difference judgment between the pulse period amount and a predetermined signal such as a synchronization signal of the recording apparatus. A slight distance moving speed determining step of performing, based on a determination result of the small distance moving speed determining step, and a motor speed correction step of correcting the preset rotational speed value of said motor means,
The micro-distance detection pattern means is composed of a pattern forming unit capable of detecting the micro-distance amount and a pattern break part that is not capable of detecting the micro-distance amount. If the detection pulse signal from the sensor detection means is not detected for a predetermined time or more, it is determined that the passage of the pattern break has begun.
Pattern interruption start determining step, a detection pulse counting step of counting the number of detection pulse signals from the sensor detection means, and a pattern interruption section when the count value in the detection pulse counting step reaches a predetermined count value. Detecting the start of the pattern break in the second pattern break start determining step for determining the start of passage and the first or second pattern break start determining step; A pattern break end determining step of determining that the passage of the pattern break portion has ended when the pulse signal is detected again, wherein the motor rotation speed correcting step includes at least the second pattern break start determining step. Judgment of the start of passage through the break Until the termination of the passage of the pattern discontinuity is determined in the disconnection end determination step, the method further comprises a correction interruption step of interrupting the rotation speed correction of the motor means, and each time the moving medium moves the minute distance amount, It is characterized in that the rotational speed value of the motor means is corrected and the moving speed of the moving medium is corrected to the set speed value.

In order to achieve the above object, according to the present invention, the moving speed of a moving medium in which images are sequentially formed based on image information and which moves at a predetermined speed by a motor means is fixedly set in advance according to the specifications of the recording apparatus. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set in advance so that the movement set speed value is obtained, and the motor rotation excitation cycle time based on the movement set speed value of the moving medium is recognized. Next excitation instructing means for instructing the next excitation execution, and rotation excitation performing means for performing the next excitation of the motor means with an output timing signal of the next excitation instructing means, and on the medium surface of the moving medium, Alternatively, a pattern is provided on the auxiliary member corresponding to the medium surface so that the entire length of the moving medium in the moving direction is divided at regular intervals along the moving direction and the state changes for each distance amount. A minute distance detecting pattern means in which the pattern is equally divided by an arbitrary constant value within a range of several tens to several hundreds of micrometers so that the minute moving distance can be detected; and And a sensor detecting means for detecting a state change of each pattern of the use pattern means, and a motor rotation speed control method of a motor rotation speed control device, wherein each of the patterns detected by the sensor detection means with the movement of the moving medium A cycle time measuring step of counting a required time of the detection pulse cycle, and the sensor detection means obtainable from a minute detection distance amount preset in the minute distance detection pattern means and a cycle measurement time by the cycle time measurement means. A detection pulse speed calculation step of calculating a pulse cycle speed; and the detection pulse speed calculation for each pulse detected by the sensor detection means. A moving speed determination comparing step of comparing the pulse cycle speed value calculated in the step with the previously set moving set speed value of the moving medium; and a motor rotation based on the moving set speed value of the moving medium. An exciting cycle time counting step for recognizing an exciting cycle time, and an exciting cycle for correcting and correcting a count value set in the exciting cycle time counting step according to predetermined conditions provided in advance according to a comparison result in the moving speed determination comparing step. An output timing signal of the next excitation instructing means is transmitted to the rotation excitation executing means with the content corrected in the time correction step and the excitation cycle time correcting step, so that the rotation speed of the motor means is set to the movement set speed. The motor rotation excitation cycle time based on the value is corrected in the excitation cycle time correction step A motor rotation speed correction step of accelerating or decelerating time.

According to a third aspect of the present invention, there is provided a recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein the moving speed of the moving medium on which an image is formed is reduced. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to be a movement set speed value fixed and set in advance in the specification of the recording apparatus, and the moving medium is used as a rotation speed control system of the motor means. Next excitation instructing means for recognizing a motor rotation excitation cycle time based on the moving set speed value and instructing execution of next excitation, and performing next excitation of the motor means by an output timing signal from the next excitation instructing means. Rotation excitation execution means,
In order to detect a minute moving distance of the medium surface on a medium surface along the moving direction of the moving medium or on an auxiliary member surface corresponding to the medium surface, an image in the moving direction of the moving medium is detected. A pattern is sequentially formed with unit detection distance intervals each having a minute distance amount obtained by multiplying one dot distance amount of a row by an integer, and is equally divided by the unit detection distance intervals with respect to the entire length of the moving medium in the moving direction. A minute distance detection pattern means in which a pattern break is set with a distance interval amount equal to or greater than the unit detection distance interval amount for a surplus distance amount, and the minute distance detection pattern moving with movement of the moving medium A motor rotation speed control method for a motor rotation speed control device, comprising: An image synchronization signal that indicates a cycle phase of a pulse and an image writing timing generated for each dot of an image row along a moving direction of the moving medium when forming an image is set by the unit detection distance interval amount. A moving medium speed judging step for judging a phase synchronizing state by comparing a periodic phase of a line synchronizing pulse generated by a line synchronizing pulse generating means which is an integral multiple of a dot distance amount, and for recognizing a rotation excitation cycle time of the motor. An excitation cycle time counting step for counting a preset standard excitation time count value, and an excitation cycle for correcting and correcting the standard excitation time count value under predetermined conditions preset from the result of the moving medium speed determination step. By correcting the counting timing in the time correction step and the excitation cycle time counting step, the A motor rotation speed correction step of performing acceleration / deceleration control by varying the phase of the output timing signal to be generated, and performing a rotation speed correction of the rotation speed of the motor means, which is performed by the rotation excitation execution means, by the time corrected in the excitation cycle time correction step. It is characterized by doing.

In order to achieve the above object, the invention of claim 39 is directed to a recording medium, which is driven by a motor rotating at a predetermined speed set in the specification of the recording apparatus, and moves on a medium surface along a moving direction of the moving medium. Alternatively, on an auxiliary member corresponding to the medium surface, a pattern forming portion capable of detecting a minute unit distance amount of the moving medium surface and a discontinuous portion which cannot detect a minute unit distance amount of the moving medium surface are configured. The minute distance detecting pattern means is disposed at an arbitrary position adjacent to the minute distance detecting pattern means, and the state change state of the pattern forming section and the discontinuous portion for each minute unit distance amount is converted into an electric signal. In the control method of the motor rotation speed control device having a sensor detecting means, an interval of a predetermined time or more is detected based on a period time amount of an electric signal generated from the sensor detecting means. A position determining step discontinuity is determined that the discontinuity of the minute distance detection pattern means and,
A minute distance speed judging step of judging a unit speed for each minute unit distance amount by detecting an interval within the predetermined time based on a period time amount of an electric signal emitted from the sensor detecting unit; and a unit for each minute distance amount. A speed comparison step of comparing and judging a value of a speed with a preset value of the set speed of the moving medium surface; and when performing excitation at a preset motor excitation cycle time, Motor rotation speed correction step means for correcting the motor excitation cycle time based on a speed comparison result for each unit distance amount, on a medium surface of the moving medium, or on an auxiliary member corresponding to the medium surface Has at least two or more sets of said minute distance detecting pattern means and said sensor detecting means, and has a plurality of said minute distance detecting pattern means. The positional relationship is configured so that the positions of the discontinuities included in each of the minute distance detecting pattern means do not overlap each other along the moving direction of the moving medium, and the electric power generated from any one of the sensor detecting means is provided. A detection signal selection step of selecting a signal, wherein the motor rotation speed correction step is based on the electric signal selected in the detection signal selection step, and the motor excitation is performed based on a speed comparison result compared in the speed comparison step. It is characterized in that the cycle time is corrected.

In order to achieve the above object, the invention of claim 45 is directed to a recording medium driven by a motor means, on a medium surface along a moving direction of a moving medium built in a recording apparatus, or an auxiliary corresponding to the medium surface. On the member, a minute distance detecting pattern means that displays a distance pattern in units of a minute distance amount set in advance, and disposed at any vicinity of the minute distance detecting pattern means, and detects the distance pattern, A sensor detecting means for generating a detection pulse signal each time the moving amount of the moving medium moves by the minute distance amount, wherein the minute distance detecting pattern means comprises a pattern forming unit capable of detecting the minute distance amount. And a program for controlling a motor rotation speed control device constituted by a computer and a pattern break portion in which the minute distance amount cannot be detected by a computer. In the recording medium, the program instructs the computer to compare and determine the pulse period amount of the detection pulse signal generated by the sensor detection means with a predetermined time amount, or to determine the pulse period amount by a predetermined value such as a synchronization signal of a recording device. A periodic phase difference determination with a signal is performed, and a preset rotation speed value of the motor unit is corrected based on the determination result. At this time, a detection pulse signal from the sensor detection unit is longer than a predetermined time. If not detected, it is judged and recognized that the first passage of the pattern break portion has started, and at the same time, the number of detection pulse signals from the sensor detecting means is counted, and when the count value reaches a predetermined count value, the pattern break is stopped. After the start of the second and subsequent passes of the portion, and after determining the start of the pattern break portion, from the sensor detection means When the detection pulse signal is re-detected, it is determined that the passage of the pattern break is completed, and at least when the start of the second or subsequent passage of the pattern break is determined, the end of the pattern break is determined. During this time, the rotation speed correction of the motor means is interrupted, whereby the rotation speed value of the motor means is corrected each time the moving medium moves by the minute distance, and the moving speed of the moving medium is set at the set speed value. Convergence correction.

In order to achieve the above object, according to the invention of claim 46, the moving speed of a moving medium in which images are sequentially formed based on image information and which moves at a predetermined speed by a motor means is fixedly set in advance according to the specifications of the recording apparatus. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set in advance so that the movement set speed value is obtained, and the motor rotation excitation cycle time based on the movement set speed value of the moving medium is recognized. Next excitation instructing means for instructing the next excitation execution, and rotation excitation performing means for performing the next excitation of the motor means with an output timing signal of the next excitation instructing means, and on the medium surface of the moving medium, Alternatively, a pattern is provided on the auxiliary member corresponding to the medium surface so as to divide the entire length of the moving medium in the moving direction along the moving direction at equal intervals and change the state for each distance amount. A minute distance detecting pattern means in which the pattern is equally divided by an arbitrary constant value within a range of several tens to several hundreds of micrometers so that the minute moving distance can be detected; and A recording medium that records a program for controlling a motor rotation speed control device having a sensor detection unit that detects a state change for each pattern of the use pattern unit by a computer,
The program causes the computer to count the required time of the detection pulse period for each pattern detected by the sensor detecting means in accordance with the movement of the moving medium, and the minute detecting distance preset in the minute distance detecting pattern means. The pulse period speed obtained by the sensor detection unit is calculated from the amount and the period measurement time, and the pulse period speed value calculated for each pulse detected by the sensor detection unit and the previously fixed and set of the moving medium are set. A count to be compared with a set movement speed value, to count a motor rotation excitation cycle time based on the set movement speed value of the moving medium, and to set the excitation cycle time count according to a predetermined condition provided in advance according to the comparison result. The output timing signal of the next excitation instruction means with the corrected content. By transmitting the rotation to the motor excitation execution means, the rotation speed of the motor means is corrected for the motor rotation excitation cycle time based on the movement set speed value, the time is accelerated or decelerated. Features.

According to another aspect of the present invention, there is provided a recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein the moving speed of the moving medium on which an image is formed is reduced. The transfer coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to be a movement set speed value fixed and set in advance in the specification of the recording apparatus, and the moving medium is used as a rotation speed control system of the motor means. Next excitation instructing means for recognizing a motor rotation excitation cycle time based on the moving set speed value and instructing execution of next excitation, and performing next excitation of the motor means by an output timing signal from the next excitation instructing means. Rotation excitation execution means,
In order to detect a minute moving distance of the medium surface on a medium surface along the moving direction of the moving medium or on an auxiliary member surface corresponding to the medium surface, an image in the moving direction of the moving medium is detected. A pattern is sequentially formed with unit detection distance intervals each having a minute distance amount obtained by multiplying one dot distance amount of a row by an integer, and is equally divided by the unit detection distance intervals with respect to the entire length of the moving medium in the moving direction. A minute distance detection pattern means in which a pattern break is set with a distance interval amount equal to or greater than the unit detection distance interval amount for a surplus distance amount, and the minute distance detection pattern moving with movement of the moving medium A recording medium for recording a program for controlling a motor rotation speed control device having a sensor detection means for reading a change in the pattern state of the means by a computer, Program to the computer,
The image synchronization signal indicating the periodic phase of the detection pulse detected by the sensor detection means and the image writing timing generated for each dot of the image sequence along the moving direction of the moving medium when forming an image. The phase synchronization state is determined by comparing the cycle phase of the line synchronization pulse generated by the line synchronization pulse generation means that is an integral multiple of the one dot distance amount set by the unit detection distance interval amount, and the rotation excitation cycle time of the motor is determined. A predetermined standard excitation time count value for recognition is counted, the standard excitation time count value is corrected and corrected under predetermined conditions set in advance from the determination result, and the count timing of the excitation cycle time count is corrected. By changing the phase of the output timing signal issued from the next excitation instruction means, the rotation excitation execution means executes Time period to be the corrected rotational speed of over motor means and thereby deceleration control.

In order to achieve the above object, the invention according to claim 48 is directed to a recording medium, which is driven by a motor rotating at a predetermined speed set by the specification of the recording apparatus and moves on a medium surface along a moving direction of the moving medium. Alternatively, on an auxiliary member corresponding to the medium surface, a pattern forming portion capable of detecting a minute unit distance amount of the moving medium surface and a discontinuous portion which cannot detect a minute unit distance amount of the moving medium surface are configured. The minute distance detecting pattern means, and arranging it at an arbitrary position near the minute distance detecting pattern means, and converting the state change state of the pattern forming portion and the break portion for each minute unit distance amount into an electric signal. A sensor detecting means, on the medium surface of the moving medium, or on an auxiliary member corresponding to the medium surface, at least two or more sets of the minute distance detecting pattern means, And a plurality of the minute distance detecting pattern means having a plurality of the minute distance detecting pattern means, and the position of the discontinuity which each of the minute distance detecting pattern means has along the moving direction of the moving medium. In a recording medium which is configured in a positional relationship where they do not overlap with each other, and which stores a program for controlling a motor rotation speed control device having a detection signal selection step of selecting an electric signal generated from any one of the sensor detection means by a computer, The program causes the computer to determine that the interval is equal to or longer than a predetermined time based on the amount of periodic time of the electric signal emitted from the sensor detection means and determine that the gap is the discontinuity of the minute distance detection pattern means. Based on the amount of periodic time of the emitted electric signal,
The unit speed for each minute unit distance is determined by detecting the interval within the predetermined time, and the value of the unit speed for each minute unit distance is compared with a preset value of the set speed of the moving medium surface. When the excitation is performed at a preset motor excitation cycle time, the motor excitation cycle time is corrected based on the speed comparison result for each minute unit distance amount, and at that time, based on the selected electric signal. Further, the motor excitation cycle time is corrected based on the speed comparison result.

(Function 1) With the above configuration, in the first embodiment of the present invention, when the moving medium such as the photosensitive drum is started at a rotational speed set in advance by the motor means, the minute distance detecting pattern portion is used. A detection pulse signal is generated from the sensor detection means, and based on the cycle of the detection pulse signal, the rotation speed of the moving medium is determined for each minute distance, and at the same time, whether the detection pulse signal does not have a cycle time longer than a predetermined time or not. By recognizing the start point of the pattern break in the minute distance detection pattern section, and then determining the start position timing of the pattern forming section, the total number of detection pulse signals is counted, and at the same time, the detection pulse signal is detected. The rotation speed of the moving medium is determined for each minute distance amount based on the cycle of By correcting the positive value, the convergence correction is performed to a preset speed value, and when the count value reaches a predetermined number, the rotation speed correction of the motor means is interrupted, and this interruption is again performed by the pattern forming unit. Continue until the start position timing is recognized. That is, since the total number of detection pulse signals detected from the pattern forming unit is a fixed value for one configuration, the timing of the detection pulse signal at the head of the pattern forming unit is captured, and the sum is counted to reach a predetermined value. Is recognized, it can be determined which detection pulse signal is used to terminate the pattern forming unit. Therefore, it is possible to reliably determine the end of the pattern forming section, and to immediately execute an interruption operation for invalidating the rotation speed correction of the motor means. The final effect of preventing conspicuous deviation due to erroneous correction can be realized without configuring new sensor detection means and increasing the cost.

(Function 2) In the second embodiment of the present invention, the minute distance detection pattern portion is formed on the surface of the moving medium or on an auxiliary member corresponding to the surface of the medium, and the minute distance detection pattern portion is formed on the surface of the moving medium. Moving along with the movement, the sensor detecting means reads the state change for each minute distance amount of the minute distance detection pattern part, outputs a detection pulse, and measures and counts the period time amount of the output detection pulse for each detection pulse. Then, the measured cycle time is calculated based on a minute distance amount set in advance to calculate a pulse cycle speed value of the detection pulse, and the calculated pulse cycle speed value is determined based on a movement set speed value fixed and set in advance. As a result of the comparison, a moving speed value for each predetermined minute distance amount is calculated, a counting operation is performed using the calculated motor rotation cycle time as a count value, and a next excitation instruction is issued each time up. The output timing signal is transmitted to the stage, and the count value, which is the motor rotation cycle time based on the movement set speed value, is corrected and corrected in accordance with a predetermined condition provided in advance based on the comparison result by the movement speed determination and comparison means. The phase transmitted to the excitation instructing means is also corrected, and the phase of the timing signal output to the rotation excitation executing means is also corrected, and finally, the rotation speed of the motor means is accelerated by the corrected time, or After being decelerated, the convergence of the moving speed of the moving medium is corrected to the previously set moving speed value.

In the correction and correction of the count value according to the above-described predetermined condition, one of the following operations is performed.

If it is determined that the speed is slow, the count value of the excitation cycle time counting means is set at a value reduced by a predetermined ratio, the motor rotation excitation cycle time is shortened, and the rotational speed of the motor means is accelerated and corrected. . On the other hand, if it is determined to be earlier, the count value of the excitation cycle time counting means is set at a value increased by a predetermined ratio, the motor rotation excitation cycle time is delayed, and the rotation speed of the motor means is reduced. to correct.

A difference calculation means for executing a difference calculation between the set movement speed value and the pulse cycle speed value is provided.
A value obtained by subtracting the count value of the excitation cycle time counting means by the calculation result value of the difference calculation means is set, the motor rotation excitation cycle time is shortened, and the rotational speed of the motor means is accelerated and corrected. On the other hand, if it is determined to be earlier, a value obtained by adding the count value of the excitation cycle time counting means to the calculation result value of the difference calculation means is set, and the motor rotation excitation cycle time is delayed. The rotation speed of the motor means is decelerated and corrected.

A difference calculating means for executing a difference calculation between the set moving speed value and the pulse cycle speed value is provided. If the moving speed judgment comparing means determines that the speed is slow, the excitation cycle time count is performed. A value obtained by subtracting the count value of the means by a value obtained by subtracting the calculation result value of the difference calculation means by a predetermined ratio is set, the motor rotation excitation cycle time is shortened, and the rotation speed of the motor means is accelerated and corrected. . On the other hand, if it is determined that it is early, a value obtained by adding the count value of the excitation cycle time counting means by a value obtained by making the calculation result value of the difference calculation means a predetermined ratio is set, and the motor rotation is set. The excitation cycle time is delayed, and the rotational speed of the motor means is decelerated and corrected.

(Function 3) In the third embodiment of the present invention, the minute distance detection pattern portion is formed on the medium surface in the moving direction of the moving medium, or on the auxiliary member surface corresponding to the medium surface. Moving along with the movement of the moving medium, the minute moving distance on the surface of the moving medium is read by the sensor detecting means, and when the recording device forms an image,
A line synchronization pulse obtained by multiplying the period of the image synchronization signal by an integral number corresponding to a predetermined unit detection distance interval amount constituting the pattern interval of the minute distance detection pattern portion with respect to the image synchronization signal generated for each dot image line. Is output by the sensor detecting means, and the periodic phase of the detection pulse and the periodic phase of the line synchronization pulse are compared and determined to determine whether or not the moving speed accompanying the image formation of the moving medium is appropriate. The indicated value is updated for each minute movement distance that is the unit detection distance interval amount, and the standard excitation time count value for recognizing the motor rotation excitation cycle time based on the movement set speed value of the moving medium is counted, and the motor rotation is counted. While the time is up, the counting of the standard excitation time count value is continued and restarted each time the time is up, and the next excitation instructing means is touched every time the time is up. The next excitation instructing means transmits the output timing signal to the rotation excitation executing means, and the rotation excitation executing means immediately executes the next excitation of the motor means, and adjusts the moving speed of the moving medium. Since the data value of the standard excitation time count value is corrected and corrected under predetermined conditions according to the determination, the motor means that is motor-excited at a constant speed rotation with a period determined by the standard excitation time count value as a cycle. The motor rotation speed correction means corrects the standard excitation time count value under predetermined conditions in accordance with the moving speed of the moving medium, which is determined for each minute distance which is the unit detection distance interval amount of the moving medium. The motor excitation timing is changed by the time to be corrected, and the rotation speed of the motor means to be accelerated / decelerated is executed by the changed time.

Further, the moving medium speed judging means has either a first counting means or a second counting means. If the first counting means is provided, the sensor detecting means operates so as to count a required time for each detection pulse detected by the sensor detection means, and determines whether or not a predetermined detection pulse break determination time value has been exceeded. The interruption time determination means operates to make the determination. On the other hand, when the second counting means is provided, it operates so as to count the number of inputs of the image synchronization signal generated in one cycle for each of the detection pulses. Falcon,
The signal input number judging means operates to judge whether or not it is not. As a result, when the pattern break position determining means determines that the count value has exceeded the count value by either the break time determining means or the signal input determining means, the movement of the moving medium at present is detected by the minute distance. It is determined that a break has occurred in the pattern configuration provided by the use pattern break detection means. Then, the motor rotation speed correction means determines that the moving medium is currently moving at a break in the pattern configuration by the pattern break position determining means.
Until the correction and execution of the standard excitation time count value are interrupted immediately and the interruption of the pattern configuration ends, the rotation speed of the motor means is continuously executed at the fixed speed set by the standard excitation time count value. This prevents erroneous correction of the motor rotation speed at a break in the pattern configuration, which makes it impossible to determine the appropriate moving speed of the moving medium at present.

(Function 4) In the fourth embodiment of the present invention, the mounting of the plurality of minute distance detecting pattern portions is performed in such a manner that the positions of the discontinuous portions do not overlap with each other. The electric signals generated by the detecting means indicate break positions at different phase timings. On the other hand, the detection signal selection means executes an arbitrary selection means, and selects an electric signal emitted from any one of the sensor detection means among the electric signals emitted from the plurality of sensor detection means. As a result, the break position determination means
The start position of the break is determined by the electric signal from the currently selected sensor detection means. Further, the minute distance speed determining means determines a unit speed for each minute unit distance amount by an electric signal from the selected sensor detecting means until the start position of the break is determined, and the speed comparing means is set in advance. The determined speed value of the moving medium surface is compared with the value of the unit speed for each minute unit distance amount. Further, the motor excitation means corrects the motor excitation cycle time by the motor rotation speed correction means based on the comparison result of the motor excitation cycle time by the speed comparison means. By the operation described above, the moving speed of the moving medium is continuously corrected based on the selected electric signal until the start position of the break is determined by the electric signal from the selected sensor detecting means, and the moving medium is kept at a constant speed. Move with. Thereafter, when the start position of the break is determined in the electric signal selected by the break position determining means, the detection signal selecting means executes the detection signal switching means and outputs the electric signal generated by another sensor detection means. Switch to. The switched electric signal is similarly treated as an electric signal from the sensor detecting means currently selected by the break position determining means,
The determination for determining the start position of the break is continued again. Also, both the minute distance speed determination means and the speed comparison means,
The motor excitation means and the motor rotation speed correction means also treat the switched electric signal as an electric signal from the currently selected sensor detection means, and determine the start position of the break in the movement speed correction of the moving medium. Run until
Therefore, the movement speed correction of the moving medium is executed by an electric signal from one selected sensor detection unit until the start position of the break is determined, and when the start position of the break is determined, It is continued to be executed by being switched to an electric signal having a non-overlapping discontinuity from another sensor detecting means, and the motor excitation cycle time is corrected by the speed comparison from the speed comparing means. In other words, the motor rotation speed correction means of the motor excitation means can continuously perform correction without being affected by interruption of correction due to a break.

Alternatively, in the above configuration, since the plurality of minute distance detecting pattern means are configured in such a manner that the position of each break is relatively positioned at a predetermined angle set in advance, the plurality of minute distance detecting pattern means are provided. The electric signal generated by the sensor detecting means indicates a break position at a phase timing determined by the predetermined angle.

On the other hand, the detection signal selecting means similarly executes an optional selecting means, and selects an electric signal generated from any one of the plurality of sensor detecting means. Then, as described above, until the break position determining means determines the start position of the break by the currently selected electric signal, the minute distance speed determining means determines the unit speed for each minute unit distance amount by the selected electric signal. And the speed comparison means compares and determines the preset speed value of the moving medium surface with the unit speed value. Further, in the same manner as described above, the motor excitation cycle time is also determined by the motor rotation speed correction means based on the comparison result of the speed comparison means until the motor excitation means determines the start position of the interruption portion by the currently selected electric signal. Correct the time.

By the above operation, the moving speed of the moving medium is continuously corrected based on the selected electric signal until the start position of the break is determined by the electric signal from the selected sensor detecting means. Move at a constant speed. Thereafter, when the start position of the break is determined from the electric signal selected by the break position determining means, the detection signal selecting means executes the first detection signal switching means and performs an order based on the setting of the predetermined angle. In the same manner as described above, the minute distance speed determination means, the speed comparison means,
The motor exciting means and the motor rotational speed correcting means execute the same operation, and continuously execute the moving speed correction of the moving medium without being affected by the interruption. When the first detection signal switching means is executed, the subsequent switching is executed by the second detection signal switching means. That is,
For the total length in the moving direction of the moving medium, there is provided a counter means for counting a time value calculated based on the total length of the discontinuity formed by each minute distance detection pattern means. The electrical signals generated by the plurality of sensor detecting means are switched in an order determined by the positional relationship of the breaks of the minute distance detecting pattern means attached at a predetermined angle.

Therefore, first, when the start position of the break is recognized by the first detection signal switching means, the second detection signal switching means thereafter sets the predetermined position at predetermined time intervals based on the predetermined angle. By successively switching the electric signals generated by the sensor detecting means in accordance with the order in which they are performed, the input of the electric signals can be continued while avoiding the break. As a result, the first and second detection signal switching means can cause the speed comparison means to perform the speed comparison of the unit speed for each of the continued minute unit distance amounts. The motor excitation cycle time can be corrected based on the speed comparison result from, and the correction can be executed continuously without being affected by interruption of the correction due to a break. Further, the above-described configuration is provided by including a plurality of minute distance detection pattern units and a plurality of minute distance speed determination units corresponding to the plurality of sensor detection units on a one-to-one basis, a break position determination unit, and a speed comparison unit. The speed comparison can be performed with a plurality of electric signals generated by the plurality of sensor detection units without using the switching unit.
Then, the motor excitation means outputs an average value of the correction times of the plurality of motor excitation cycle times calculated from the results from the plurality of speed comparison means obtained from the plurality of valid electric signals by the average value calculation means. . As a result, even if one of the electric signals has an interruption due to a break in the electric signal, the correction of the motor excitation cycle time can be supplemented and continued by the other electric signals. Furthermore, since the speed comparison of the unit speeds for each of the plurality of unit distance amounts can be executed, and the motor excitation cycle time can be corrected based on the average value result, finer correction can be continuously executed.

[0071]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 shows a functional configuration of a motor rotation speed control device according to a first embodiment of the present invention. Reference numeral 1 denotes a photosensitive drum which is a moving medium, 2 denotes a gear arrangement which is a motor power transmission unit, and 3 denotes a motor unit which executes a rotating operation of the photosensitive drum 1. In this embodiment, a pulse motor is used. Reference numeral 7 denotes a motor driver IC for driving the pulse motor 3. Reference numeral 4 denotes a minute distance detection pattern portion. In this embodiment, a magnetic pattern is shown as an example installed on an auxiliary member that rotates coaxially and integrally with the photosensitive drum 1, and a pattern forming portion 4A having a magnetic pattern is shown.
And a pattern break 4B having no magnetic pattern. Reference numeral 5 denotes a magnetic sensor serving as a sensor detecting unit, specifically, an MR sensor which converts a change in the state of the S and N poles of the magnetic pattern into an electric signal and outputs a detection pulse signal. Is issued. Reference numeral 6 denotes an optical box unit (optical box), which is a light scanning unit that irradiates the photosensitive drum 1 with light by rotating a laser beam that blinks in accordance with an image signal with a polygon mirror having a mirror surface. A horizontal image synchronization signal (hereinafter abbreviated as BD signal) is generated for each head position. And
The image information is formed in the main scanning direction by synchronizing with the BD signal and executing the writing, and further, by repeatedly executing this image line, the image forming in the sub-scanning direction is executed and one image is formed. It becomes an image.

Reference numeral 10 denotes a CPU (Central Processing Unit) as a whole, which receives a detection pulse signal generated by the sensor detector 5 for each minute distance of the photosensitive drum 1 and instructs the minute distance moving speed judging unit 11. In this context, the motor rotation speed correction unit 18 is operated, and the motor excitation unit 19 outputs the execution of the corrected motor excitation to the motor driver IC 7. Further, the minute distance moving speed determination unit 11 executes the processes shown by the functional operation blocks 12 to 17 to control the instruction of the motor rotation speed correction unit 18. It should be noted that the block diagrams 12 to 19 shown in the CPU 10 are represented for easy understanding of the control internal processing, and specific operations will be described in detail in the program execution processing operation of the CPU 10 described later. I will.

The purpose of the present invention is not to maintain the rotational speed control of the motor unit 3 for executing the movement of the moving medium 1 at a preset number of rotations, but to set the speed on the moving medium surface.
Alternatively, the corresponding moving speed on the auxiliary member surface is measured for each minute distance using the minute distance detecting pattern unit 4, and the moving speed of the moving medium 1 is converged to the set speed. With respect to correcting the rotation speed of the motor unit 3,
An erroneous correction of the rotation speed of the motor unit 3 which may occur at a boundary point between the pattern forming unit 4A configured to detect the minute distance amount and the pattern break 4B where the minute distance amount cannot be detected is configured in the minute distance detection pattern unit. Is to prevent it.

Therefore, the rotation speed correction operation of the motor unit 3 performed by the motor rotation speed correction unit 18 is executed only from the time when the head position of the magnetic pattern forming unit 4A is recognized to the time when the final position is predicted and recognized. On the other hand, during the movement of the pattern break 4B, the rotation speed correction operation of the motor unit 3 is interrupted. For this reason, the leading position of the pattern forming unit 4A is determined from the movement of the pattern break 4B, and the detection pulse signal of the magnetic sensor 5 is detected by the detection pulse counting unit 14 until the total number of detection pulse signals that the pattern forming unit 4A has in advance is reached. By counting, the occurrence position of the final detection pulse at the end of the pattern forming section is predicted and recognized, whereby the position of the boundary point between the end of the pattern forming section and the pattern break 4B is reliably recognized, and the position of the boundary point is determined. At this time, the execution of the rotation speed correction of the motor unit 3 is interrupted.

As a result, it is possible to prevent erroneous correction of the execution of the rotational speed correction of the motor section 3 which may occur at the boundary point between the pattern forming section 4A and the pattern break section 4B. Since the rotation speed of the motor unit 3 is corrected, the moving speed of the moving medium 1 is corrected for convergence, and the pitch unevenness of the image lines is suppressed.

In the present embodiment, the moving medium 1 is used as a photosensitive drum in an electrophotographic apparatus, and the rotational movement speed correction control is specifically described as an example. The present invention relates to the correction of the rotational speed of the motor unit of the drive source for correcting the convergence to a uniform speed, and is not limited to the electrophotographic apparatus or the photosensitive drum described in the embodiment, but the moving speed of the moving medium. Is constant and
This is effective for executing movement control without speed unevenness. Further, the minute distance detection pattern unit 4 and the sensor unit 5
Similarly, the measurement and detection of minute movement distance speed information and the processing method thereof are not limited to the present embodiment. That is, it goes without saying that the motor rotation speed control device of the present invention can be used for controlling the moving speed of the photosensitive belt other than the photosensitive drum, or the transfer drum or the transfer belt of a recording apparatus for forming a color image. Further, the present invention is not limited to the electrophotographic apparatus, and can be used for controlling the moving speed of a moving medium over a wide range, such as controlling the moving speed of a moving medium that requires precision and controlling the conveying speed of an image recording material.

On the other hand, in the present embodiment, the moving medium 1 is moved with respect to the actual minute moving distance by using the magnetic pattern 4 and the magnetic sensor 5 in the minute distance detecting pattern section and the sensor detecting section of the moving medium. Although the speed information is configured to be fed back, an encoder unit (not shown) using an optical sensor (not shown) or the like may be used instead. In the present embodiment, the motor unit that controls the movement of the moving medium 1 is described using an example in which the pulse motor 3 is used. Similarly, the motor unit also controls the motor type and the motor rotation speed according to the motor type. However, the present invention is not particularly limited as long as the motor rotation speed control used is capable of correcting the rotation speed by feeding back the movement speed information for the current minute unit distance amount of the moving medium described above.

In FIG. 1, the magnetic pattern 4 is represented in black and white for easy understanding, but there are also those in which the entire surface is composed of black and those which are colorless and transparent and are directly printed on a medium. When printing on a medium with this colorless and transparent, for example,
If a magnetic sensor or the like is prepared in the transport path where the pattern is printed in advance on the printing paper that is the recording material, the transport speed such as oblique transport of the recording material, jam detection, and positioning of the recording material will be determined. The present invention can also be applied to print paper transport behavior control, which is a purpose other than the correction control.

Next, before describing the operation of the present embodiment,
The definition of the magnetic pattern configuration that is the basis of the present invention will be described. In the present embodiment, the magnetic pattern 4 is shown as being attached to an auxiliary member corresponding to the surface of the moving medium 1, but may be attached to the surface of the photosensitive drum 1. In the magnetic sensor 4 as well, non-contact or contact may be used as long as it is adjacent to the magnetic pattern. Further, the set distance amount of the minute distance amount which the pattern forming unit 4A has is:
In the present invention, in particular, even if it is constituted by one line of an image or several lines, or by the photosensitive drum movement amount for one motor excitation or the number of motor excitations,
In any case, the total length of the pattern forming portion is an integer multiple of a certain set distance amount. That is, the entire length of the pattern forming portion 4A formed in the moving direction of the photosensitive drum 1 is hardly equal to the circumferential length of the photosensitive drum 1, and a fraction is formed. The configuration is such that there is a break 4B. Here, the principle of the first pattern break start determining unit (cycle time upper limit comparing unit 13) corresponding to the conventional example for determining the pattern break 4B will be briefly described.

The detection pulse signal generated by the sensor detection unit 5 can be detected one after another during a predetermined range of time determined by the rotation speed (including the speed deviation) of the photosensitive drum 1 while moving the pattern formation unit 4A. Therefore, when the detection pulse signal is received within a sufficient time range set in advance, it can be determined that the pattern break has not been moved. Conversely, when the detection pulse signal is not received even when the time exceeds the predetermined range, it is determined that the pattern break 4B has already been started.

Subsequently, the overall operation in the present embodiment will be described using the functional block portion shown in the CPU 10 of FIG. 1, which is the first embodiment of the present invention. Although a motor unit serving as a drive source for the rotation operation of the photosensitive drum 1 in the electrophotographic apparatus may be configured to be used in common for transporting print paper, in the present embodiment, a drum motor is used for ease of explanation. Although the description will be made on the case where the pulse motor 3 is independently configured, the configuration of the motor unit and the gear arrangement are not particularly limited.

In FIG. 1, one of the detection pulse signals emitted from the sensor detecting section 4 is input to a period amount comparing section 12, and the period amount is determined by a timer function 20, which is a basic configuration of the CPU 10. You. In this embodiment,
Although the detection pulse signal is determined based on the cycle time, it is needless to say that the detection pulse signal may be compared with the cycle phase of the BD signal detectable from the optical box 6.

Then, when the period amount for each detection pulse signal is determined, the result is transmitted to the motor rotational speed correction unit 18 each time. The motor rotation speed correction unit 18 determines whether the correction execution is valid or invalid based on a signal from a correction interrupting unit 17 described later. If invalid, the motor excitation unit 19 is controlled according to a preset motor excitation cycle time. Next, a next excitation pattern signal is issued, and the rotation of the motor unit 3 is controlled.
On the other hand, when the correction execution from the correction interrupting unit 17 is valid, a predetermined amount of time based on the result of the period amount comparing unit 12 is corrected by a value obtained by adding or subtracting a predetermined motor excitation period amount, and By issuing a next excitation pattern signal to the motor excitation unit 19 for each elapsed time of the calculated value, the rotation speed correction control of the motor unit 3 is executed.

Next, the validity / invalidity result (signal) issued by the correction suspending unit 17 recognizes the head position of the pattern forming unit 4A with respect to the photosensitive drum 1 whose rotation starts from an arbitrary position first. For this purpose, the first pattern interruption start determination unit is executed. That is, the cycle time upper limit comparing unit 13 detects a timing at which the cycle time of the detected pulse signal is not detected for the predetermined range time or more, and thereby the pattern break 4B.
Is detected and determined from an arbitrary rotation start position.

Next, when it is determined that the pattern break section 4B has started, the pattern break end determining section 16 determines
The generation timing of the first detection pulse signal detected thereafter is determined. As a result, the pattern forming section 4
The timing of the leading end position of A is determined, and the home position of the minute distance detection pattern unit 4 of the photosensitive drum 1 whose rotation has been started from an arbitrary position is recognized.
Finally, when the tip position of the pattern forming unit 4A is known, the second pattern break start determining unit is executed, and the operation of the first pattern break start determining unit ends.

When the occurrence of the first detection pulse signal is determined by the pattern interruption end determination section 16, the detection pulse counting section 14 is operated, and the total number of the detection pulse signals is counted. Until the count is incremented to the value indicated by the predetermined count value data 15, the correction suspending unit 17 outputs the correction validity.
Outputs the correction invalidation. Further, when the counting is completed, the determination by the pattern interruption end determination unit 16 is executed again, and thereafter, the relay operation with the second pattern interruption start determination unit is repeated.

Once the tip position of the pattern forming section 4A is determined by the above control operation, the number of detection pulse signals based on the total number of patterns fixed in advance in the pattern forming section 4A is thereafter determined by the detection pulse counting section 14. By monitoring, the start position of the pattern break 4B can be determined without delay, and the tip position of the pattern forming unit 4A can also be determined without delay using the detection pulse signal. Therefore, the recognition of the boundary point between the pattern forming unit 4A and the pattern break 4B can be determined without delay, and the validity or invalidity of the execution of the rotation speed correction of the motor unit 18 can be accurately instructed according to the determination result. In addition, erroneous correction of the motor rotation speed can be prevented.

The rotation speed correction of the motor unit 3 until the start position of the pattern forming unit 4A is determined may be valid or invalid. However, it is assumed that the image forming operation is not permitted until the operation is performed by the second pattern interruption start determining unit (detection pulse counting unit 14).

Next, specific program processing executed by the CPU 10 will be described with reference to the flowcharts shown in FIGS. 2, 3, 4, and 5. The CPU 10 software processing method according to the present embodiment is a program processing in which parallel processing can be executed by having a task form.
While executing in small steps of each task as a unit,
Furthermore, it is based on a monitor program that periodically scans each task. Therefore, the program in the task according to the present embodiment is represented by a description along one flow. In other words, the description form for each task is
It can be expressed by closed loop processing within one task. Hereinafter, FIG.
Will be described in order.

FIG. 2 is a flowchart showing the program processing corresponding to the motor excitation section 19 for executing the rotation of the pulse motor 3 and called in the motor rotation execution routine 20. Normally, the motor excitation unit 19 of the pulse motor 3 sets the motor excitation cycle time set in advance as a fixed data value and executes the next excitation every time the time elapses. The feature is that the motor excitation cycle time is made flexible by executing the next excitation of the motor excitation with the contents of a memory (not shown) storing the excitation cycle time and rewriting the contents of the memory. Therefore, for the motor excitation unit other than the one that makes the motor excitation cycle time flexible,
An extremely general method is used, and there is no particular limitation.

When the motor rotation execution routine 20 is entered, initialization for executing motor rotation is executed in steps 21 and 22. An excitation cycle time memory indicating a flexible motor excitation cycle time, which is one of the features of the present embodiment, is a memory in which initialization data values are set in advance, and is called a set standard value calculated from the motor speed. The time data value is stored, and the excitation is executed at the time indicated by the set standard value until the correction control of the motor rotation is started.

Next, at step 23, a detection mode flag
And reset the image permission flag to zero,
Clears the count value of the detection pulse counter to zero. In step 24, an instruction to rotate the motor is determined. If there is no ON request, the process returns to step 21 to wait for the instruction to turn on the motor in a loop.

If there is an instruction to turn on the motor in step 24, slow-up excitation for executing rotation of the motor 3 is executed in step 25, and a detection mode flag operated in another task is checked in step 26. The detection mode flag detects the pattern break 4B coming first when the motor starts to rotate, and further detects the pattern break 4B.
It is set when the start position of A can be confirmed, and is not reset until the motor rotation ends. In other words, in the present embodiment, the detection mode flag is transferred to the second pattern break start determining unit (14) after the processing by the first pattern break start determining unit (13) described later is completed. When the flag is set, the execution of the rotation speed correction of the photosensitive drum 1 is started. Conversely, until the detection mode flag is set, the pattern forming section 4A of the photosensitive drum 1
In this case, since the synchronization is not established by the start position determination, the convergence correction of the rotational speed of the photosensitive drum 1 is not executed, and it means that image formation cannot be executed.

At step 26, the detection mode flag is determined. If this flag is set, at step 27, an image permission flag for permitting the execution of image formation is set.
If the detection mode flag is reset, the process proceeds to step 28 while the image permission flag is reset.

In step 28, a data value stored in an excitation cycle time memory (not shown) is set in an excitation counter as an excitation time at which the rotation of the motor should be executed. Then, it is determined in step 29 that the excitation counter has timed out, and if the time is up, the next excitation output is executed in step 30. As a result, the motor excitation unit 19 of the present embodiment can execute excitation with a flexible cycle time based on the contents of the excitation cycle time memory.
Can be operated according to predetermined conditions. The contents of the excitation cycle time memory are set in FIG.
Will be described in detail.

When the next excitation is executed, the execution request of the motor rotation is determined in step 31. If the rotation execution is continued, the process returns to step 26 again and the same processing as described above is repeated. On the other hand, if the end of the execution of the motor rotation has been requested, the process proceeds to step 32, where the rotation of the motor 3 is slowed down and the stop operation is started. Thereafter, the process returns to step 21 and the same processing as described above is repeated.

As described above, this motor rotation execution routine executes the motor rotation in accordance with the contents of the excitation cycle time memory set in another routine, and executes the motor rotation speed correction control described below. The motor rotation is executed with the data content of the excitation cycle time memory set by the result.

FIG. 3 is a flow chart showing a program process called in the motor excitation correction routine 30. In order to set the data content of the excitation cycle time memory for performing the motor rotation speed correction control of the pulse motor 3, a period amount is set. The comparison unit 12 compares the current minute distance speed with the set speed, and the motor rotation speed correction unit 18 determines the motor excitation time according to the comparison result.

When the motor excitation correction routine 35 is entered, it is checked in steps 36, 37 and 38 whether or not the motor rotation correction can be executed. If it loops, it waits.

In step 39, it is determined whether or not the correction suspension flag is set. If the correction suspension flag is reset, the process proceeds to step 40, in which the motor excitation time is corrected. On the other hand, if the correction suspension flag is set, the process skips to step 45 and cancels the execution of the correction of the motor excitation time amount. In other words, the correction interruption flag is determined by the first or second pattern interruption start determination unit judging the movement of the pattern interruption unit 4B and then judged by the pattern interruption end judgment unit 16 to determine the end of the movement of the pattern interruption unit 4B. This is a flag which is set until the correction is made, and during which the correction of the motor excitation time amount is interrupted.

Therefore, when the correction suspension flag is reset, the content of a memory called a unit speed time memory (not shown) storing the current measured speed data value is processed in another routine at step 40 and stored. , Is compared with a preset standard value. The detailed processing of the contents of the unit speed time memory will be described later in a CPU event timer interrupt routine of FIG. 4 and each port interrupt routine of FIG.

The motor excitation time amount is set based on the comparison result of the comparison processing in step 40. That is, if it is determined that the measured moving speed value based on the current photoconductor drum 1 is faster than the set standard value, the process proceeds to step 4.
In steps 1 and 42, the motor excitation time is set so that the motor rotates slowly by the amount of correction time set in advance. If it is determined that the current measured moving speed value based on the photosensitive drum 1 is slow rotation as compared with the set standard value, the rotation speed is increased by the amount of correction time set in advance in steps 43 and 44. Set the motor excitation time in.

Further, if it is determined that the current measured moving speed value based on the photosensitive drum 1 is the same as the set standard value, or if it is determined that the correction interruption flag in step 39 has been set. Then, a motor excitation time which is not corrected in step 45 and remains at the set standard value is set.
Then, step 42, step 44, step 4
In step 46, the value set in any one of the steps 5 is stored in an excitation cycle time memory (not shown).

As a result, the motor rotation is executed in accordance with FIG.
As described above, the motor is rotated according to the flexible set time. That is, since the next excitation time of the motor rotation is corrected by performing the comparison determination for each of the measured minute distance amounts, the surface speed of the photosensitive drum 1 is corrected while converging to the set standard value. become. In the present embodiment, the amount of excitation time to be corrected is just an example, and the calculation unit of the correction value and the correction value are not particularly limited.

Finally, referring to FIGS. 4 and 5, the first and second pattern break start judging sections (13, 14) and the pattern break end judging section 16, which are intended by the present invention, and correction A process for executing the suspending unit 17 will be described.

FIG. 4 shows a timer interrupt routine 50 for event timer processing of the CPU 10, which is a routine for processing time management required when executing various task programs, and mainly performs various timer interrupt processing. ing. Note that, in the present embodiment,
Only the necessary timer processing and the related flag processing will be described in detail. Further, the occurrence of the event timer interrupt is set at a predetermined interval time amount based on the operation clock source of the CPU 10, and the time measurement of the detection pulse signal and the like in the present invention is performed when the predetermined interrupt cycle time elapses. The calculation or the like may be considered with the corresponding count value for each time, and is not particularly limited to the interrupt cycle time.

When an event timer interrupt occurs, in step 51, execution processing for other necessary timers is performed. In step 52, a timer for measuring the period amount of the detection pulse signal called a unit speed timer is incremented. In step 53, the state of the detection mode flag is determined, and the first or second pattern It recognizes which of the interruption start determination units is being executed.

Since the detection mode flag is reset until the rotation of the motor is executed and the head position of the pattern forming unit is recognized, the first step is to execute the first pattern interruption start determining unit. The process proceeds to 54, where the value of the interruption detection timer is counted up. Then, it is determined in step 55 whether or not the value of the interruption detection timer has reached a predetermined value, thereby checking whether or not the pattern interruption portion has already been started. Until the movement of the first pattern break is confirmed, the first pattern break start determining unit shown in steps 53, 54 and 55 is executed.

When it is determined in step 55 that the value of the interruption detection timer has reached a predetermined value, step 56
Accordingly, it is determined that the pattern break is moving, and a correction stop flag is set, and the correction of the motor rotational speed in the first pattern break start determining unit is interrupted. That is,
A delayed determination is made based on the result that the detection pulse signal is not received for a predetermined time or more.

Then, in step 57, the value of the interruption detection timer for the first interruption start judging section is cleared, and the process ends.

Next, at step 53, the state of the detection mode flag is judged, and when the second pattern interruption start judging section is executed, the setting of the detection mode flag is set. Then, the process is skipped by the determination of the detection mode flag in step 53, and this routine ends. That is, in the present embodiment, the time is managed only by the first pattern break start determining unit, and thereafter, the process is executed in synchronization with the input detection pulse signal.

FIG. 5 shows a sensor detecting section (magnetic sensor) 5 utilizing a general port interrupt function of the CPU 10.
4 is a flowchart showing a procedure of a processing program for measuring a period of a detection pulse signal generated by the computer. Note that, in the present embodiment, a case is described in which an interrupt is generated every time a detection pulse signal is received, synchronization with the detection pulse signal is performed, and processing is executed. The method of synchronization is not particularly limited, and it is needless to say that synchronization without using an interrupt may be used.

First, when a port interrupt is generated by the detection pulse signal, the correction interruption flag is determined in step 61 to recognize whether or not the detection pulse signal is the first detection pulse signal of the pattern forming section 4A indicating the end of the pattern break section 4B. I do. The correction interruption flag is set when the first or second pattern interruption start determination unit determines the start of the pattern interruption, and is reset when the first detection pulse signal of the pattern formation unit is recognized. When the motor unit (pulse motor) 3 starts rotating, the process first proceeds to step 62 because the correction suspension flag has been reset, and
The data value of the unit speed timer counted by the timer interrupt is stored in the unit speed time memory in order to store and hold the time amount for one cycle of the detection pulse signal.

Then, the data value of the unit speed time memory is cleared in step 65, whereby the initialization of the timer for measuring the period time amount of the next detection pulse signal is executed. The data value stored in the unit speed time memory is compared and executed as the current measured speed for the aforementioned minute distance amount.

Next, in step 66, the detection mode flag is checked to determine whether the pattern break portion is used by the first or the second break start determining unit. .

When the first interruption start judging unit is used, the process proceeds to step 67, where the judgment of the pattern interruption part in is judged after a predetermined time or more, so that the data value of the interruption detection timer is cleared. Thereby, the interruption detection timer is initialized in order to determine whether or not the amount of the cycle time of the next detection pulse signal is over.

When the start of the motor is started and the first pattern interruption occurs, the value of the interruption detection timer indicates a predetermined time or more in the above-described timer interrupt processing, and it is recognized that the detection pulse signal is not received. The first pattern break start determination unit determines that the copy has started. As a result, the correction interruption flag is set, the execution of the correction of the motor rotation speed is interrupted, and the pattern interruption end determination unit 16 is operated.

Thereafter, when a detection pulse signal is generated, the process proceeds from step 61 to step 63, where it is determined that the pattern interruption section 4B has been completed and the first detection pulse signal of the pattern forming section 4A has been received. Therefore, the correction interruption flag is reset in step 63, and the detection mode flag is set in step 64, so that the subsequent pattern break start determination is sent from the first pattern break start determination unit to the second pattern break start determination unit. Switch.

Then, in step 65, the unit speed timer for measuring the amount of period time of the next detection pulse signal is initialized, and the process proceeds from step 66 to step 69 to operate the second pattern break start judging section. First, at step 69, the detection pulse counter is incremented to count the total number of detection pulse signals. Then, in a step 70, it is determined whether or not the detected pulse counter value has reached a predetermined value. This is because, as described above, since the total number of the detected pulse signals of the pattern forming unit 4A having the fixed entire length is invariable, the pattern forming unit 4A is synchronized with the detected pulse signal that determines that the pattern forming unit starts. By monitoring the count value, the starting point of the pattern break is determined.

Therefore, until the detected pulse counter value reaches the predetermined count value, the period time amount of the detected pulse signal in steps 61, 62 and 65 is measured. 7
At 0, 71, and 72, the determination by the second pattern break start determination unit is performed. Specifically, in step 71, a correction interruption flag is set, the execution of the rotation speed correction of the motor unit is interrupted, and in step 72, the second pattern interruption start determining unit is used to execute the next pattern interruption start determination. The value of the detection pulse counter is cleared and initialized.

The above is the description of the first embodiment of the present invention.
This is the content of the control operation of the CPU 10. By this control operation, even if the rotation operation of the pulse motor 3 for driving the photoconductor drum 1 is started from an arbitrary position of the minute distance detection pattern 4, the photoconductor drum 1 rotates at least once.
The first pattern break start determining unit 13 captures the start timing of the pattern break 4B from the cycle time of the detection pulse signal, and the pattern break end determining unit 16 detects the first detection pulse signal generated thereafter. The head position of the pattern forming section 4A can be recognized. That is, while at least one photosensitive drum 1 makes one rotation, synchronization with the leading position of the pattern forming unit 4A is executed by the first pattern break start determining unit 13 and the pattern break end determining unit 16.

Thereafter, the second pattern break start judging section 14 counts the total number of detection pulse signals generated, and compares the count value with the preset number of detection pulse signals set in the pattern forming section 4A. By doing so, the start position of the next pattern break 4B can be predicted, and immediately after receiving the last detection pulse signal from the pattern forming unit 4A, it is possible to interrupt the correction of the motor rotation speed without a time delay. switch.

That is, according to the present embodiment, once the first pattern break start determining unit 13 and the pattern break end determining unit 16 synchronize, after that, the second pattern break start determining unit 14 The pattern break end determining unit 16 can determine the pattern break 4B and the pattern forming unit 4A without delay, and can stop the operation of correcting the rotation speed of the motor unit 3. Therefore, the pattern break 4B and the pattern forming unit 4A. Motor part 3 at the boundary point of
Can prevent the occurrence of pitch unevenness due to erroneous correction of.

The first pattern break start judging section 13
The rotation speed correction of the motor unit 3 does not need to be executed until the synchronization with the pattern interruption end determination unit 16 is established.
Further, although not particularly limited, as to the start of the image formation, the motor unit which is guaranteed until the second pattern break start determining unit 14 and the pattern break end determining unit 16 are synchronized with the pattern forming unit 4A. Since the rotation speed of the motor unit 3 cannot be corrected, the rotation speed correction of the motor unit 3 waits until the image permission flag is set.

Therefore, when executing image formation, the correction of the rotational speed of the motor unit 3 is interrupted by the correction interrupting unit 17 at the position of the pattern break 4B, and the rotation of the motor unit 3 is stopped at the position of the pattern forming unit 4A. Speed correction is performed,
In addition, erroneous correction due to the boundary point is prevented. For this reason, the rotation speed of the photosensitive drum 1 is corrected for convergence to a preset speed, thereby reducing a pitch unevenness phenomenon in image formation.
Alternatively, it can be prevented.

(Second Embodiment) Next, a second embodiment of the present invention will be described. The second embodiment of the present invention is a modification of the above-described first embodiment of the present invention,
Its purpose is, similarly to the first embodiment, the second pattern break start judging section 14 and the pattern break end judging section 16.
Thus, the pattern break 4B and the pattern forming part 4A
Is determined without delay, and the operation of correcting the rotational speed of the motor unit 3 is interrupted, so that the motor unit 3 at the boundary between the pattern break 4B and the pattern forming unit 4A is determined.
This prevents the occurrence of pitch unevenness due to the erroneous correction of.

The difference between the second embodiment and the first embodiment is that, in the first embodiment, as described above, the detection pulse counter of the second Pattern forming unit 4 in which is set in advance
When a predetermined number determined by the total length of A is reached, it is configured to determine the start position of the pattern break 4B, but in the second embodiment, the second pattern break start determining unit 1
The comparison data value of the detection pulse counter included in 4 is obtained by counting the total number of detection pulse signals measured from the entire length of the pattern forming section 4A by rotating the photosensitive drum 1 once beforehand, and storing and holding the count value. The measurement data stored and held is compared with the counter value of the detection pulse counter to determine the start position of the pattern break 4B.

Accordingly, in the case of manufacturing an apparatus with the configuration of the first embodiment, the total length of the pattern forming section 4A of the minute distance detecting pattern section 4 is the same as the total number of detected pulse signals. It is necessary to perform strict control so that there is no difference in the total number of detected pulse signals between the devices. However, the second
In the case of the embodiment, the total number of the detected pulse signals with respect to the entire length of the pattern forming section 4A of each device can be actually calculated without strictly controlling the entire length of the pattern forming section 4A of the minute distance detecting pattern section 4. Since the operation is performed by measuring, there is an advantage that it is not necessary to strictly manage the entire length of the pattern forming section 4A. Further, the fact that the entire length of the pattern forming section 4A does not have to be absolutely guaranteed means that the same configuration can be used in different apparatuses even if the total length of the pattern forming section 4A is different. Therefore, the configuration described in the second embodiment is not only effective for one type of device, but also has the advantage that the same configuration can be used as it is for various types of devices.

Hereinafter, the second embodiment will be described with reference to the flowcharts of FIGS. 6, 7, and 8.
In the second embodiment, the description of the same parts as in the first embodiment is omitted, and FIGS. 1 and 2 described in the first embodiment are used as they are. Description is also omitted.

The flowchart of FIG. 6 is a motor rotation execution routine in the second embodiment, and is basically the same as the flow of FIG. 2 in the first embodiment. The difference is that step 33 inserted between step 23 and step 24
Here, the measurement flag is to be reset, and thereby the initialization executed when the rotation of the motor unit 3 is started is performed.

The measurement flag is set in the pattern forming section 4
This is set during the measurement of the total number of detection pulse signals included in A. The rotation of the motor 3 is started, and the first pattern break start determining unit 13 and the pattern break end determining unit 16 are started.
Then, the timing is set when synchronization with the head position of the pattern forming unit 4A is first achieved, and the total number of detection pulse signals is measured. Then, the determination by the first pattern break start determining unit 13 and the pattern break end determining unit 16 is further extended, and when the next pattern break 4B is detected, the measurement flag is reset and the measured detection pulse signal is reset. Is stored in a memory unit (not shown).

The flowchart of FIG. 7 is a timer interrupt routine in the second embodiment. Steps 50 to 57 are the same as those in FIG. 4 of the first embodiment.
Further, the flowchart of FIG. 8 is a port interrupt routine based on a detection pulse signal in the second embodiment. Steps 60 to 69 correspond to FIG. 5 of the first embodiment.
Is the same as

In the second embodiment, as in the first embodiment, when the movement of the minute distance detection pattern unit 4 is started from an arbitrary position, the first pattern interruption start determination unit 1
3 and the pattern break end determining unit 16 recognize the timing of the head position of the pattern forming unit 4A. Thereafter, the control for measuring the total number of detection pulse signals included in the pattern forming unit 4A is started. That is, the fact that the first pattern break start determining unit 13 has started the pattern break 4B is determined by the steps 55, 56, and 57 in FIG.
In step 75, a measurement flag is set, and the total number of detection pulse signals of the pattern forming unit 4A is measured.

When the measurement flag is set, the detection pulse signal generated from the head position of the next pattern forming section 4A is added to the detection pulse counter 14 every time an interrupt is generated in step 82 of FIG. Perform a count.

On the other hand, in the timer interrupt of FIG. 7, the first pattern interruption start judging section 13 monitors that the next pattern interruption section 4B is newly started. Until it is determined that has reached the predetermined value, the detection pulse counter 14 continues the counting operation. As a result, the detection pulse counter 14 measures the total number of detection pulse signals generated over the entire length of the pattern forming section 4A.

When the pattern interruption portion 4B is started again, the process proceeds to step 77 by the judgment processing in step 75 in FIG. 7, and stores the count value of the detection pulse counter 14 in the measurement memory, and stores the count value in the pattern forming portion 4A. The total number of detection pulse signals included in is stored and held. After that, the execution of the first pattern interruption start determination unit 13 is terminated,
As in the first embodiment, the second pattern break start determination unit is executed.

The basic operation of the second pattern break start judging section is the same as that of the first embodiment, except that the count value of the detection pulse counter 14 is compared with a set predetermined value to determine the pattern break section 4B. Instead of predicting the start position of the pattern, the data value (measured value) of the stored measurement memory is compared with the count value of the detection pulse counter to determine the start position of the pattern break 4B. There is a characteristic.

In FIG. 8, the detection mode flag is checked in step 66, and if the second pattern interruption start judging section has been executed, the process proceeds to step 69, where the count value of the detection pulse counter 14 for the current interrupt is counted. In the next step 80, it is determined whether or not the count value has reached the data value of the measurement memory.

When the count value of the detection pulse counter 14 reaches the data value of the measurement memory, it is determined that the pattern break 4B is started, and the correction is made in steps 71 and 72 as in the first embodiment. Set the suspend flag, clear the count value of the detection pulse counter 14,
The process returns to the pattern break end determination unit 16.

The above procedure is the procedure of the control operation of the second embodiment. By this control operation, similarly to the first embodiment, the second pattern break start determining unit (14) and the pattern break end determining unit 16 accurately determine the position of the next pattern break 4B without delay. , And even if the total number of detected pulse signals of the pattern forming unit 4A between the apparatuses is different, it is immediately switched to the suspension of the correction of the motor rotational speed by the common determination control.

As described above, in the second embodiment, when the first pattern break start determining section 13 and the pattern break end determining section 16 synchronize the head position of the pattern forming section 4A, the following is performed. After counting and storing the total number of detected pulse signals generated up to the pattern break 4B, the second pattern is used to count the number of detected pulse signals from the beginning of the pattern forming unit 4A and compare and judge with the measured value. The interruption start determination unit and the pattern interruption end determination unit can judge the distinction between the pattern interruption unit 4B and the pattern forming unit 4B without delay.
Can be interrupted, so that pitch unevenness due to erroneous correction of the motor unit 3 at the boundary between the pattern break 4B and the pattern forming unit 4B can be prevented.

Also in the second embodiment, the rotation speed correction of the motor unit is executed until the measurement data value is set in the measurement memory by the first pattern break start determining unit and the pattern break end determining unit. You don't have to.

(Third Embodiment) Next, a third embodiment of the present invention will be described. As will be described later, the motor rotation speed control device of the present embodiment always performs a fixed moving speed of the moving medium, which is set in advance, with high accuracy to reduce or eliminate rotation unevenness that causes a pitch unevenness image. For this purpose, the micro moving distance of the moving medium is detected, the moving speed for each micro moving distance is calculated from the detected micro moving distance, and the speed fluctuation for each micro moving distance is calculated from the calculated moving speed for each micro moving distance. And a motor rotation speed correction unit that corrects the rotation speed of the motor unit that executes the movement of the moving medium in accordance with the speed fluctuation for each minute movement distance.

In this embodiment, as a specific example, a motor rotation speed correction unit for correcting the rotation speed of a drum motor unit for controlling the rotation of a photosensitive drum in an electrophotographic apparatus will be described. The motor rotation speed correction unit according to the present invention is not limited to an electrophotographic apparatus, but can be used for controlling a moving speed of a moving medium in a recording apparatus in general. Further, similarly for the moving medium, not only the rotation speed control of the photosensitive drum but also the rotation speed control of the transfer drum and the transfer belt for full-color image formation,
The present invention can be used for motor rotation control that requires accuracy of the moving speed of a moving medium in a printing apparatus, such as controlling the conveying speed of an image recording material.

Hereinafter, the third embodiment of the present invention will be described.
This will be specifically described with reference to the block diagram of FIG. 9 and the flowcharts of FIG. 10 and FIG.

FIG. 9 is a block diagram showing a configuration example of a motor rotation speed control device according to the third embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a photosensitive drum which is one of moving media, 102 denotes a gear arrangement which is a motor power transmission unit,
Reference numeral 103 denotes a pulse motor which is one of motor units for rotating the photosensitive drum 101, 104 denotes a motor driver IC (integrated circuit) which executes rotation excitation driving of the pulse motor 103, and 105 denotes rotation of the pulse motor 103. It is a CPU (central processing unit) that controls speed.

The functional blocks indicated by reference numerals 110 to 119 in the figure represent the control processing executed by the CPU 105, and make it easier to understand the operation of the CPU 105 described later.

First, before describing the operation of the present embodiment, the configuration and definition of the minute moving distance amount, which is the basis of the present invention, will be described. Although the configuration for detecting the minute moving distance amount in the present embodiment is not particularly shown, a magnetic pattern which is a pattern portion for detecting a minute distance is provided on the surface of the photoreceptor drum 101, and a sensor detecting unit is provided at an adjacent position. 9 may be provided, and FIG.
An auxiliary member corresponding to the surface of the photosensitive drum 101 is provided as shown in FIG.
May be provided. However, in practice, since various high-voltage power supplies are applied to the photosensitive drum 101, if the magnetic pattern 106 is provided on the surface of the photosensitive drum 101, it is necessary to take noise countermeasures against the magnetic sensor 107. In the example, as shown in FIG. 9, a configuration is adopted in which a magnetic pattern 106 is provided on a corresponding auxiliary member on the surface of the photosensitive drum 101.

The specification of the magnetic pattern 106 is as follows.
In addition, since the image can be divided into minute distance amounts, the state change can be detected at intervals of several tens of micrometers to hundreds of micrometers, which is a distance of several dots from a distance equivalent to one dot for image formation. Is to be composed.
Second, the specifications of the magnetic pattern 106 are that the intervals of the state change are physically equal intervals (excluding the intersections). That is, since the magnetic pattern 106 is used for speed determination control in which arithmetic calculation is performed according to a certain rule with a certain required time and a certain minute distance, a stripe pattern at equal intervals is employed.

Third, the specifications of the magnetic pattern 106 are that the pattern is allocated such that the circumferential length of the moving medium surface becomes a state change interval that can be equally divided by an integral multiple. That is, if the magnetic pattern 106 is set at a state change interval at which the circumferential length of the photosensitive drum 101 surface, which is a moving medium, cannot be equally divided by an integral multiple, the magnetic pattern on the photosensitive drum 101 surface is necessarily interrupted somewhere. This is because, as a result, the minute distance speed correction is erroneously corrected at the position of the break.

Accordingly, the magnetic pattern 106 of the present embodiment is
In, the minute distance detection pattern unit for detecting the minute distance amount pre-configured on the moving medium surface, the surface circumference of the moving medium to be used can be equally divided by an integral multiple, several dots to several hundred dots The configuration is such that the detection can be performed with a minute distance amount, and is not directly related to the dot distance amount at which image formation is performed. Then, the motor rotation speed control device of the present embodiment basically calculates the speed for each minute unit distance determined by the minute distance detection pattern unit 106, and for each recording device, commonly called process speed. The rotation speed of the photoconductor drum 101 is compared with a preset rotation speed value of the photoconductor drum 101, and the rotation speed of the drum motor unit 103 that determines the rotation speed of the photoconductor drum 101 is minutely corrected.

Hereinafter, the motor unit 1 according to the third embodiment, including the functional blocks 110 to 119 in FIG.
The control operation of the CPU 105 for performing the above-described rotation speed correction of No. 03 will be described.

The photosensitive drum 101 forms an image by sequentially executing a well-known electrophotographic process. The cause of the pitch unevenness image is, in particular, a point in time when a latent image is formed in the electrophotographic process. Occurs in In the latent image process, a latent image is formed by irradiating a light beam that blinks based on image information onto the surface of the photosensitive drum 101 to generate a potential difference. Specifically, the photosensitive drum 1
The light irradiation according to the image information is executed by optical scanning at a predetermined timing based on the synchronization signal in the longitudinal direction of the image sensor 01 in the main scanning direction. By rotating the sub-scanning direction, which is the rotational movement direction, at a movement setting speed value called a process speed, an image in which one dot line row formed in the main scanning direction is arranged at a column interval distance amount at equal intervals is obtained. It is formed. At this time, if rotation unevenness occurs in the rotation speed of the photosensitive drum 101 rotating and rotating with respect to light irradiation scanned at equal intervals, a positional shift naturally occurs at intervals of one dot line row. If the amount of displacement exceeds a certain amount, the image becomes conspicuous as a pitch unevenness image.

For this reason, in this embodiment, the drive motor 1
03 is corrected and corrected for each minute distance amount, the rotational speed in the sub-scanning direction is corrected to converge to the set speed in units of minute distance amounts, and the rotational movement of the photosensitive drum 101 is always kept at a constant speed. The motor rotation speed correction unit is configured to perform this.

Photosensitive drum 101 in electrophotographic apparatus
In some embodiments, the pulse motor 103 called a drum motor is independently configured exclusively for the photosensitive drum 101 for ease of explanation. Will be described.
Therefore, in the actual machine, the configuration of the gear arrangement 102 and the like may be devised, and the motor unit may be configured to share the photosensitive drum 101 and print paper conveyance. The configuration of the motor is not particularly limited. Further, the type of the motor is not particularly limited as long as it is a motor capable of minutely correcting the rotation speed.

The photosensitive drum 101 includes a pulse motor 10
Gear arrangement 102 in which the rotational power of No. 3 is a motor power transmission unit
To perform the rotational motion according to the set transmission coefficient. The rotational movement speed for the rotational movement is controlled by a motor excitation cycle time determined by a movement set speed value which is a process speed and a transmission coefficient of the gear array 102. Hereinafter, the motor excitation with the same cycle time is basically referred to simply as “standard rotation value”. In the present invention, when the motor rotation speed correction is not performed, the motor rotation speed is calculated based on the standard rotation value. Is executed.

Further, in the present embodiment, in the motor rotation speed correction, processing is executed so as to correct and correct the cycle time of the standard rotation value. However, depending on the calculation result in the detection pulse speed calculation unit, the moving speed determination is performed. The correction of the motor rotation speed may be performed by the unit in the cycle time of the standard rotation value, that is, a determination process that no correction is made may be added.

In FIG. 9, portions indicated by 117 to 119 are motor rotation execution portions for directly executing the rotation speed control of the pulse motor 103, and portions indicated by 110 to 116 execute the excitation cycle time with the standard rotation value. This is a motor rotation correction control section for selecting whether to perform the operation with the excitation cycle time corrected based on the detection result of the detection section including the magnetic sensor 107.

In the motor rotation execution portions 117 to 119,
The rotation cycle time set in the count value load setting section 117 is set in the excitation cycle time counting section 118,
The elapsed time is executed (timed) by a timer unit (not shown) included in U105. Then, upon recognizing the elapse of the set time, the excitation cycle time counting section 118 transmits the next excitation execution to the next excitation instructing section 119 and is prepared again in the count value load setting section 117 for the next excitation. The CPU 105 reloads the current count value, and executes a new elapsed time in the timer unit of the CPU 105.

The next excitation instructing section 119 is a motor driver I
By outputting an A-phase signal and a B-phase signal to the pulse motor 103 as output timing signals to a C (rotation excitation execution unit) 104 in accordance with a preset combination order, the pulse motor 103 is rotated at a set rotation speed. Let it run.

In the motor rotation correction control sections 110 to 116, the cycle time of the detection pulse input from the magnetic sensor 107 is measured by the cycle time measuring section 110 using another timer section of the CPU 105. Then, based on the minute distance amount of the magnetic pattern 106, which is the minute distance detecting pattern portion, which has already been set, and the detected pulse cycle time measured by the cycle time measuring section 110, the detected pulse speed calculating section 11 is executed.
In step 1, the detected pulse speed value is calculated.

The moving speed judgment comparing section 113 judges and compares the detected pulse speed value calculated by the detected pulse speed calculating section 111 with a process speed value (fixed data value) which is a fixed speed of the moving medium set in advance. Then, according to the result, a correction count value for correcting and correcting the current rotational speed is selected in accordance with a predetermined condition described later in detail, and the selected motor excitation cycle time correction value setting unit 115 is set to the motor excitation cycle time correction value setting unit 115. A cycle time correction value (correction count value) is prepared.

Then, either the count value set in the motor excitation cycle time correction value setting unit 115 or the count value set in the standard rotation value setting unit 116 based on the process speed is selected. Then, the selected count value is set in the count value load setting unit 117 as the current rotation cycle time.

FIG. 1 shows the specific control contents of the motor rotation speed correction control executed by the CPU 105.
0 and a flowchart shown in FIG.

The flowchart of FIG. 10 shows the processing procedure of the motor rotation execution sections 117 to 119 described in FIG.
The control of the CPU 105 is executed by a motor rotation execution routine. The flowchart of FIG. 11 shows the processing procedure of the motor rotation correction control sections 110 to 116 described in FIG. 9, and the processing is executed by the motor rotation correction routine under the control of the CPU 105.

In the software processing method of the CPU 105 according to the present embodiment, parallel processing having a task form can be executed, and the program in the task may be described along one flow. That is, the form for each task can be represented by closed loop processing within the task, and parallel processing for each task can be performed. Hereinafter, description will be made from FIG. 10 along the flow.

In FIG. 10, when it becomes possible to execute the motor rotation execution routine, the process proceeds from step 120 to step 121, where the motor excitation pattern is initialized. That is, since the motor 103 must be stopped at this stage, the excitation output to the motor 103 is set to an all-off state.

Then, in the next step 122, a request to execute the rotation of the photosensitive drum 101 is confirmed. A rotation excitation is executed to execute a slow-up subroutine for setting the rotation of the drum motor 103 to a standard rotation value.

When the rotation of the drum motor rises, the set rotation speed memory value and the defined memory content are set in the excitation cycle time counting section 118 in step 124, and time processing for recognizing the lapse of the next excitation cycle time is performed. Start.

The counting process of the excitation cycle time counting section 118 is looped until it is determined in step 125 that the time is up.
To move to the next excitation pattern routine for accessing the next excitation pattern.

Although the processing of the next excitation pattern routine is not specifically shown, for example, when the drum motor 103 is a pulse motor, it follows a general excitation method such as 1-2 phase excitation or 2-2 phase excitation. An excitation pattern is prepared in advance, and a process of sequentially and repeatedly outputting these excitation patterns to the CPU port is executed. The excitation pattern output to the motor 103 is specified by an instruction from the excitation cycle time counting unit 118 at each time-up. The output is performed in a predetermined condition pattern for the elapse of the cycle time.

Then, in the next step 127, it is checked whether or not the rotation request of the drum motor 103 is continued. If it is instructed to stop the drum motor 103, in step 128, the rotation of the drum motor 103 is stopped. A slowdown subroutine process for executing a slowdown control to perform a slowdown control is performed, and the process returns to step 121 again to wait for a next rotation request instruction.

This motor rotation execution routine executes excitation control for motor rotation.
If the rotation request of No. 03 is continued, step 127
Then, the flow returns to step 124, and the rotation of the motor is continued by repeatedly executing the operation processing from step 124 to step 127. The time indicated by the data value stored in the set rotation speed memory (not shown) set for each excitation in step 124 is the excitation cycle time of the motor. Accordingly, since the rotation speed of the motor 103 changes depending on the contents of the data value, by correcting and correcting this data value, the rotation speed can be corrected for each minute distance of the motor.

Next, the execution of the processing of the motor rotation correction routine will be described with reference to the flowchart of FIG. The motor rotation correction routine is a routine for executing calculation and selection of a data value stored in the set rotation speed memory used in the motor rotation execution routine of FIG.

In FIG. 11A, in step 130
Is a port interrupt function that is generated when an output signal of the magnetic sensor 107 that captures a predetermined state change of the magnetic pattern 106 is transmitted to an interrupt port of the CPU 105. That is, every time the detection pulse signal of the magnetic sensor 107 is input under a predetermined condition, an interrupt is generated in step 130, and this interrupt cycle indicates the detection pulse cycle. In this embodiment, the detection pulse is monitored by the interrupt function as described above, but the normal port of the CPU may be used.

When the interrupt function of step 130 is executed, measurement of the period time of the detection pulse is executed. First, in step 131, C which is a timer P prepared in advance is used.
The time counting operation of the time counting unit based on the event timer of the PU 105 is stopped. Then, in step 132, the time data value counted by the timer P is stored and held in the memory allocated to the pulse period time, and in step 133, the count value of the timer P is reset to zero, and the time count by the timer P is newly performed. Is resumed, and this interrupt function process ends. That is, the interrupt routine process measures the detection pulse cycle time generated from the magnetic sensor 107, and the cycle time for each detection pulse cycle is constantly updated and stored in the memory.

Next, when the motor rotation correction routine 140 shown in FIG. 11B is executed, in step 141, the data value of the set rotation speed memory is set to the standard rotation value, thereby setting the motor rotation speed in advance. Initialize the rotation speed based on the set process speed. Then, in steps 142 and 143, it is determined whether or not to perform correction on the execution of the motor rotation, and it is determined whether or not to perform a loop. That is, unless the drum motor rotation control is being performed and the slow-up or the slow-down is not being performed, it is determined that the motor rotation is to be corrected. If it is determined that the motor rotation is to be corrected, a data value (pulse cycle time) is loaded from the memory in which the count value of the timer P is stored in step 144, and the pulse cycle time and the preset magnetic pattern 106 are loaded. Then, the current moving speed of the detected pulse is calculated and calculated based on the minute distance amount obtained in step (1).

Then, at step 145, the data value of the set rotation speed memory indicating the motor excitation cycle time is cleared, and at step 146, the process speed value set in advance and the moving speed of the detection pulse are compared and determined. And
If it is determined in step 147 that the cycle time of the detection pulse is short, the process proceeds to step 149, and in accordance with the determination that the photosensitive drum 101 is rotating rapidly, a predetermined ratio of the standard rotation value prepared in advance is obtained. The data value to be extended with time is set in the set rotation speed memory. on the other hand,
If it is determined that the detection pulse cycle time is late, step 1
In step 48, according to the determination that the photosensitive drum 101 is rotating at a slow speed, the data value, which is shortened by a predetermined percentage of the standard rotation value prepared in advance, is set in the set rotation speed memory. I do.

As described above, the moving speed is calculated from the detected pulse cycle time for each detected pulse cycle time, and the data value (motor excitation cycle time) of the set rotation speed memory is updated for each execution cycle of this routine. As a result, the rotation speed of the motor is corrected and corrected for each minute distance amount, and the rotation of the photosensitive drum is corrected so as to converge to the set process speed.

As a result, the rotation speed of the photosensitive drum 101 is made uniform, and the so-called piramula image is reduced or removed.

In this embodiment, the magnetic sensor 107 and the magnetic pattern 106 are used for detecting the minute distance of the moving medium 101. However, an optical sensor and a light and shade pattern may be used. Needless to say.

Although the motor section in this embodiment has been described using the pulse motor 103, the motor type and the motor rotation speed control according to the motor type are not particularly limited. In other words, the correction control intended by the present invention can be performed as long as the configuration allows the minute speed correction in the motor rotation speed control.

Further, in FIG. 9, the magnetic pattern is expressed in black and white for easy understanding, but there are also those in which the magnetic pattern is entirely black and those which are colorless and transparent and can be directly printed on a medium. In the case of printing on a colorless and transparent medium, for example, if a magnetic sensor is prepared in advance in a portion of the conveyance path where printing is performed on printing paper as a recording material in advance, for example, oblique conveyance of the recording material or jam detection Further, the present invention can be applied to a modified example in which print paper conveyance behavior control other than conveyance speed correction control such as positioning is possible.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. The fourth embodiment of the present invention is a modification of the above-described third embodiment of the present invention,
As in the third embodiment, a minute movement distance of the photosensitive drum can be recognized in order to execute the process accurately at a preset process speed and to reduce or eliminate rotation unevenness that causes a piramula image. The moving speed of each minute distance is calculated and calculated using the detection sensor unit, and the speed fluctuation of each minute moving distance is recognized, and the rotational speed of the drum motor unit that rotates the photosensitive drum is calculated for each minute moving distance. Control for correcting and correcting according to the speed fluctuation is performed.

The fourth embodiment is different from the third embodiment in that a predetermined condition for recognizing the speed fluctuation of the photosensitive drum for each minute movement distance and correcting and correcting the rotation speed of the drum motor unit. In the method of calculating the correction value according to FIG. Specifically, in the third embodiment, the rotation speed of the drum motor unit is reduced by reducing or extending the time corresponding to a predetermined ratio of the rotation speed of the motor unit defined in advance based on the process speed. By correcting and correcting the moving speed of the photoreceptor drum surface at the process speed by correcting and correcting for each moving distance, it is corrected so that the moving speed is always stable at a constant speed, and the rotation unevenness that is the cause of the piramula image. In the fourth embodiment, a difference calculation unit that performs a difference calculation between a process speed value and a speed value for each minute movement distance amount is provided. By shortening or extending the minute time, the rotation speed of the photosensitive drum is corrected by correcting the rotation speed of the motor unit defined in advance based on the process speed for each minute movement distance. It has converged corrected.

Accordingly, the motor rotation execution routine according to the fourth embodiment is the same as that of the third embodiment shown in FIG. 10, and a description thereof will be omitted. Further, the hardware configuration such as the magnetic pattern shown in FIG. 9 and the configuration of the task format for controlling the execution of the program of the CPU 105 are the same as those of the third embodiment, and therefore the description thereof is omitted.

Hereinafter, the fourth embodiment will be described with reference to the flowchart in FIG. In the fourth embodiment, description of the same parts as in the third embodiment will be omitted.

In FIG. 12A, step 130
Since the port interrupt shown in step 134 to step 134 is the same as that of the third embodiment, the description is omitted. However, by this interrupt function, the memory contents allocated to the pulse cycle time are the same as those of the third embodiment. The measurement cycle time for each cycle is constantly updated and stored in the memory.

On the other hand, in FIG. 12B, when the motor rotation correction routine 140 is executed, the execution of the motor rotation correction is confirmed in steps 141, 142, and 143 as in the third embodiment. Then, the speed of the detection pulse is calculated from the count time of the timer P and the minute distance amount. Then, in step 145, the data value of the set rotation speed memory indicating the motor excitation cycle time is cleared, and
In step 46, the process speed value set in advance is compared with the moving speed of the detection pulse.

Further, at step 150, a speed difference calculation between the process speed value and the moving speed of the detected pulse, which is a feature of the fourth embodiment, is executed to calculate a difference time from the minute distance amount. In step 147, when it is recognized that the current rotation speed of the photosensitive drum is faster than the process speed, the process proceeds to step 152.
The data value for extending the difference time calculated in step 150 from the data value for the standard rotation value is set in the set rotation speed memory, and as a result, the motor rotation speed is reduced, so that the light exposure at the current minute distance amount is performed. The action of slowing down the movement speed of the body drum works.

On the other hand, if it is recognized in step 147 that the current rotation speed of the photosensitive drum is low, the flow shifts to step 151 where the data value with respect to the standard rotation value is used to determine in step 15
By setting the data value in the set rotation speed memory and shortening the motor rotation speed as a result of shortening the difference time calculated and calculated at 0, the effect of increasing the moving speed of the photosensitive drum at the current minute distance is obtained. work.

With the above processing, the data value of the set rotation speed memory for determining the motor rotation speed is calculated for each detection pulse cycle time, and the data value of the set rotation speed memory is updated for each execution cycle of this routine. Is done. As a result, similarly to the third embodiment, the motor rotation speed is corrected and corrected for each minute distance amount, and the photosensitive drum rotation is executed with convergence corrected to the set process speed. As a result, the rotation speed of the photosensitive drum is made uniform, and the so-called piramula image is reduced or eliminated.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described. The fifth embodiment of the present invention is another modified example of the above-described third embodiment of the present invention. Similar to the third embodiment, the fifth embodiment is executed with high accuracy at a preset process speed. In order to reduce or eliminate the rotation unevenness that causes the image, the movement speed for each minute distance is calculated and calculated using the detection sensor unit that can recognize the minute movement distance of the photosensitive drum, and the minute movement distance is calculated. Each time the speed fluctuation is recognized, the rotation speed of the drum motor unit that rotates the photosensitive drum is corrected and corrected according to the speed fluctuation for each minute movement distance.

The fifth embodiment is different from the third embodiment in that a predetermined condition for recognizing the speed fluctuation of the photosensitive drum for each minute moving distance and correcting and correcting the rotation speed of the drum motor unit is different. Is different in the calculation method of the correction value according to the above.
Specifically, in the third embodiment, the rotation speed of the drum motor unit is reduced by reducing or extending the time corresponding to a predetermined ratio of the rotation speed of the motor unit defined in advance based on the process speed. By correcting and correcting the moving speed of the photoreceptor drum surface at the process speed by correcting and correcting for each moving distance, it is corrected so that the moving speed is always stable at a constant speed, and the rotation unevenness that causes the piramula image. In the fifth embodiment, a difference operation unit that executes a difference operation between a process speed value and a speed value for each minute movement distance amount is provided, and the difference operation calculation is performed. The time for the value is shortened or extended by the time of a predetermined ratio, and the rotation speed of the motor unit defined in advance based on the process speed is supplemented for each minute movement distance. By modifying, converges corrects the rotational speed of the photosensitive drum.

Accordingly, the motor rotation execution routine according to the third embodiment is the same as that of the third embodiment shown in FIG. 10, and a description thereof will be omitted. Also, the hardware configuration such as the magnetic pattern shown in FIG. 9 and the configuration of the task format for controlling the execution of the program of the CPU 105 are the same as those of the third embodiment, and thus the description thereof is omitted.

Hereinafter, the fifth embodiment will be described with reference to the flowchart in FIG. Here, the third
The description of the same parts as those of the embodiment is omitted.

In FIG. 13A, in step 130
Since the port interrupt shown in step 134 to step 134 is the same as that of the third embodiment, the description is omitted. However, by this interrupt function, the memory contents allocated to the pulse cycle time are the same as those of the third embodiment. The measurement cycle time for each cycle is constantly updated and stored in the memory.

On the other hand, when the motor rotation correction routine 140 shown in FIG. 13B is executed, the execution of the motor rotation correction is confirmed in steps 141, 142 and 143 as in the third embodiment. At 144, the speed of the detection pulse is calculated from the count time of the timer P and the minute distance amount. Then, in step 145, the data value of the set rotation speed memory indicating the motor excitation cycle time is cleared, and
In step 46, the process speed value set in advance is compared with the moving speed of the detection pulse.

Further, at step 150, as in the fourth embodiment, a speed difference between the process speed value and the moving speed of the detection pulse is executed, and a difference time is calculated from the minute distance. In step 147, if it is recognized that the current rotational speed of the photosensitive drum 101 is faster than the process speed in step 147, the process proceeds to step 155.
By setting a data value to extend the difference time calculated in the above by a predetermined amount of time in the preset rotation speed memory, and consequently delaying the motor rotation speed, the current minute distance amount is reduced. The action of slowing down the moving speed of the photosensitive drum 101 works.

On the other hand, if it is recognized in step 147 that the current rotation speed of the photosensitive drum 101 is low, the flow proceeds to step 154, in which the difference time calculated in step 150 from the data value for the standard rotation value is set in advance. A data value to be shortened by a predetermined percentage of time is set in the set rotation speed memory, and as a result, the motor rotation speed is increased, and the movement speed of the photosensitive drum 101 at the current minute distance amount is increased. .

With the above processing, the data value of the set rotation speed memory for determining the motor rotation speed is calculated for each detection pulse cycle time, and the data value of the set rotation speed memory is updated for each execution cycle of this routine. Is done. As a result, similarly to the third embodiment, the motor rotation speed is corrected and corrected for each minute distance amount, and the photosensitive drum rotation is executed with convergence corrected to the set process speed. As a result, the rotation speed of the photosensitive drum 101 is made uniform, and a so-called piramula image is reduced or eliminated.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described. The intention of the sixth embodiment of the present invention is to execute the movement of the moving medium of the printing apparatus at a set moving speed value which is fixedly set in advance and without moving speed unevenness, and to perform an image output by the printing apparatus. In order to reduce or eliminate the appearance of piramula image output,
For the rotation speed control of the motor that controls the movement of the moving medium,
A configuration in which the moving speed information corresponding to the actual minute moving distance of the moving medium is fed back, and the preset number of rotations of the motor is corrected and corrected for each minute moving distance based on the predetermined condition in accordance with the contents of the moving speed information. By doing so, the movement of the moving medium is converged and corrected at a uniform moving speed and a moving set speed value.

Hereinafter, in the sixth embodiment, the general configuration of the motor rotation speed control device will be described with reference to a functional block diagram shown in FIG. 15 will be described with reference to the flowchart of the motor rotation correction routine shown in FIG.

In FIG. 14, reference numeral 101 denotes a photosensitive drum which is one of moving media, 102 is a gear arrangement which is a motor power transmission unit, and 103 is one of motor units for rotating the photosensitive drum 101. A certain pulse motor, 104
Reference numeral 205 denotes a motor driver IC for executing rotation excitation driving of the pulse motor 103, and reference numeral 205 denotes a CPU for controlling the rotation speed of the pulse motor 103. Also, in the figure, from 211 to 2
19 is a block diagram showing the functional operation represented by CP.
This represents control internal processing executed by the U205, and expresses a program execution operation of the CPU 205 described later in an easily understandable manner.

Reference numeral 125 denotes a scanning light source box unit for scanning the photosensitive drum 101 of the electrophotographic apparatus with an optical signal of image information in order to execute image formation. Is reflected and scanned by the polygon mirror 129 which performs the scanning, and is irradiated onto the photosensitive drum 101 by scanning.

Further, when the optical scanning of one line is started by the polygon mirror 129, when the scanning is started around the starting point,
Although not particularly designated, the reflection mirror captures the light of the one-dot image line before the photosensitive drum 101 is scanned, and the light is transmitted to the image synchronization signal generation sensor unit 130 as an image synchronization signal. This image synchronization signal is commonly called a BD signal, and indicates a writing position timing of a one-dot image line described in the present embodiment.
Occurs every line.

In this embodiment, the minute distance detecting pattern portion for detecting the minute distance amount pre-configured on the surface of the moving medium has a unit detection distance interval according to an integral multiple of the one dot distance amount of the recording apparatus. It has a pattern configuration capable of detecting the change state of the magnetic pattern by the amount, and a detection pulse is obtained from this magnetic pattern. On the other hand, the configuration is such that a line synchronization pulse for detecting the image synchronization signal output for each dot distance amount at the same integral multiple as described above is obtained, and both detected pulses are captured as current speed information. As a result, in order to obtain the phase synchronization of both pulses, in order to correct the moving speed of the moving medium for each minute distance, the correction is corrected by the rotation speed of the motor unit. By maintaining the rotation speed on the surface of the photoconductor drum corresponding to the image synchronization signal period, it becomes possible to execute the moving motion of the moving medium at a constant and constant speed, thereby reducing or eliminating the piramula image. A minute distance speed correction of the rotation speed of the motor unit is realized.

Photosensitive drum 101 in electrophotographic apparatus
In some embodiments, the pulse motor 103 called a drum motor is independently configured exclusively for the photosensitive drum 101 for ease of explanation. Will be described.
Therefore, the configuration of the gear arrangement 102 and the like may be modified to include a motor unit that shares the photosensitive drum and print paper conveyance, and the configuration of the motor is not particularly limited. Further, the type of the motor is not particularly limited as long as it is a motor capable of minutely correcting the rotation speed.

Next, a description will be given of functional block portions 211 to 219 in FIG. 14 according to the sixth embodiment.

In FIG. 14, a portion indicated by 217 to 219 is a motor rotation execution portion for directly executing the rotation speed control of the pulse motor 103, and a portion indicated by 211 to 216 is a portion for executing the excitation cycle time with the standard rotation value. And a motor rotation correction control section for selecting whether to execute the excitation cycle time corrected based on the result of the detection section. The motor rotation execution portion sets the rotation cycle time set in the count value load setting section 217 in the excitation cycle time counting section 218, and executes the elapse of time by the timer section of the CPU 205.

When the set time elapses, the excitation cycle time counting section 218 transmits the next excitation execution to the next excitation instructing section 219, and sends the next excitation to the count value load setting section 217 again for the next excitation. The prepared count value is reloaded, and the timer unit of the CPU 205 executes a new elapsed time.

The next excitation instructing section 219 includes a motor driver I
A pulse motor 10 which is an output timing signal
By outputting the A-phase signal and the B-phase signal to No. 3 in accordance with a preset combination order, the pulse motor 103 is rotated at a set rotation speed.

The motor rotation correction control section measures the cycle time of the detection pulse input from the magnetic sensor 107 by the periodic phase measuring section 212 using another timer section of the CPU 205. On the other hand, the BD signal, which is an image synchronization signal,
The image synchronization signal generation sensor unit 130 performs photoelectric conversion, waveform shaping, and measures the cycle time of the line synchronization pulse generation unit 211 using another timer unit of the CPU 205.

Thereafter, the moving speed determination / comparison section 213 determines the phase condition between the periodic phase of the detected pulse and the periodic phase of the line synchronization pulse, and the rotation setting section 214 sets a predetermined condition based on the determination result. Select

Then, the motor excitation cycle time correction value section 21
In step 5, the motor excitation cycle time correction value is calculated according to the predetermined time, and the count value for the rotation cycle time set in the count value load setting section 217 is set in the motor excitation cycle time correction value setting section 215, or By selecting whether or not to set a standard excitation time count value preset in the standard excitation time count value memory 216 and setting it in the excitation cycle time counting section 217, the current rotation excitation cycle time of the motor unit is determined. Correct so that the speed is appropriate.

Next, the control operation of the motor rotation speed correction unit executed by the CPU 205 will be specifically described.

The flowchart of FIG. 10 is the same as that of the third embodiment of the present invention, and the description is omitted. By executing the motor rotation execution routine of FIG. 10, control is performed so that the time indicated by the data value stored in the memory called the set rotation speed memory value becomes the excitation cycle time of the motor. Therefore, if this data value is corrected and changed, the rotation speed of the motor also changes.

With reference to the flowchart of FIG. 15, the processing of the motor rotation correction routine will be described. still,
This motor rotation correction routine performs a process of instructing a data value to be stored in the set rotation speed memory value used in the motor rotation execution routine of FIG.

In FIG. 15A, in step 230
Is a port interrupt function in which an output signal of the magnetic sensor 107 is transmitted each time a predetermined state change of the magnetic pattern 106 is detected, and an interrupt occurs when this output signal is transmitted to an interrupt port of the CPU 205. That is, every time the detection pulse signal of the magnetic sensor 107 is input under a predetermined condition, an interruption occurs, and the interruption cycle indicates the detection pulse cycle.

In FIG. 15B, in step 237, the CPU 205 outputs an image synchronization signal (BD signal) generated from the image synchronization signal generation sensor unit 130 of the scanning optical box unit 125 for each dot image line. This interrupt function is a port interrupt function in which an interrupt occurs when the signal is transmitted to an interrupt port of this type, and the interrupt cycle indicates the image synchronization signal cycle. In this embodiment, the detection pulse and the image synchronization signal processed by the above-described interrupt function may be processed and executed by the normal port of the CPU 205.

Interrupt function 2 generated by image synchronization signal IN
When 37 is executed, the process proceeds to step 238, in which the value of the count A is incremented, and the counter A for confirming the number of image synchronization signals generated within one cycle of the detection pulse is counted and executed. Then, the process ends in the interrupt processing 239.

On the other hand, when the interrupt function 230 generated by the detection pulse-in is executed, the process proceeds to step 231 and the value of the counter A is stored in the memory A value with the current value. In the process of the counter A, the value of the counter A is cleared in the subsequent step 235, so that the counter A stores and holds the number of image synchronization signals generated during one cycle of the detection pulse as a count in the memory A value. . In other words, by this operation, it is necessary to move by an integer number N of the image synchronization signal.
Information for comparing the periodic phase condition between the detection pulse constituted by the minute movement amount and the line synchronization pulse constituted by an integer number N of the image synchronization signal is stored in the memory A value.

If the current rotation speed of the photosensitive drum 101 is moving as set in advance, the information of the memory A value for storing the number of image synchronization signals generated during the detection pulse cycle is set in advance. If the memory A value is smaller than the integral multiple N, the moving speed of the photosensitive drum 101 is fast and the memory A If the value is larger than the integer multiple N, the moving speed of the photosensitive drum 101 becomes slow. Therefore, the detection pulse-in interrupt and the BD signal-in interrupt detect information for comparing the cycle phase of the line synchronization pulse by the line synchronization pulse generator with the cycle phase of the detection pulse.

Although the flag processing executed in steps 232 to 234 is not for the present invention, the home position of one rotation unit of the photosensitive drum 101 using the minute distance detection pattern interruption detecting unit 106B. In this process, the cue timing, which is the position, is determined, and when the break position start flag is set in step 234, this flag indicates that the current position is in the break position. Therefore, the time when the flag state is shifted from the set state to the reset state may be set as a cueing position and processed according to the application.

Next, when the motor rotation correction routine 240 shown in FIG. 15C is executed, in step 241 the motor rotation speed is set in advance by setting the standard excitation time count value in the set rotation speed memory value. Initialize the rotation speed based on the process speed to be performed. Then, in Steps 242 and 243, it is determined whether or not a correction is to be made for the execution of the motor rotation, and it is determined whether or not to perform a loop.

If it is determined that the correction of the motor rotation is to be executed, it is determined in step 244 whether or not the number of image synchronization signals within the detection pulse cycle at the present stage exceeds an integer multiple N of a preset image synchronization signal. Thus, it is determined whether or not the pattern break portion 106B is moving. Although the value for determining the value of the counter A is not particularly limited, in the case of this example, the determination is made based on N + 2. That is, by inputting the image synchronization signal two lines more than the set number N within the detection pulse period, it is determined that the interval is equal to or more than the unit detection distance interval constituting the pattern interval of the magnetic pattern 106, and the other than the break portion This is because it can be distinguished from the moving state of 106A.

As a result of the determination in step 244, if the interrupted portion 106B is determined, the process proceeds to step 249, where the rotational speed correction of the photosensitive drum 101 cannot be executed, and the standard excitation time count is stored in the set rotation speed memory. A value is set, and processing is performed so as to instruct the set rotation in the appropriate rotation determination.
The processes after the second are continuously executed. Thus, the rotation speed of the motor 103 is controlled to rotate at the standard excitation time count value set in advance in the motor rotation execution routine of FIG.

On the other hand, in step 244, the interrupted portion 106
If it is not B, the moving medium moving speed comparison / determination unit 213 for comparing and comparing the detection pulse, the line synchronization pulse, and the pulse phase synchronization in steps 245 and 246 is executed. In the present embodiment, an example is described in which the moving medium speed is determined by checking the number of image synchronization signals generated during the detection pulse period. That is, by comparing the number N of integer multiples of the image synchronization signal constituting the line synchronization pulse with the value of the memory A storing the number of image synchronization signals generated within the period of the detection pulse, the number is set in advance within the period of the detection pulse. The periodic phase of the line synchronization pulse is determined.

If the value of the memory A is equal to the set integer multiple N, it is determined that the speed of the detection pulse period is appropriate, and the flow shifts to step 249 to execute the same execution process as during the interruption. Done.

If it is determined that the value of the memory A is larger than the set integer multiple N, the process proceeds to step 247 to indicate that the number of image synchronization signals generated within the detection pulse cycle time is large. Therefore, the rotation speed of the photosensitive drum 101 is determined to be slow rotation, and a value obtained by shortening a predetermined ratio of the standard excitation time count value, which is a predetermined predetermined condition, is set in the set rotation speed memory. . As a result, the rotation speed of the motor 103 is controlled to be faster by the time shortened in the motor rotation execution routine of FIG.

Further, if it is determined that the value of the memory A is smaller than the set integer multiple N, step 248 is executed.
To indicate that the number of image synchronization signals generated within the detection pulse cycle time is small, so that the rotation speed of the photosensitive drum is determined to be fast rotation, and the standard excitation time count value, which is a predetermined condition set in advance, is used. A value obtained by extending a predetermined ratio of time in the above is set in the set rotation speed memory. As a result, the rotation speed of the motor 103 is controlled to be slower by the time extended in the motor rotation execution routine of FIG.

In steps 247 and 248, similarly to the case of step 249, when the count value is set under the preset condition of the set rotation speed memory value, the process returns to step 242 again, and while the motor rotation is continued. Always repeats the above operation.

By the above operation, the data value of the set rotation speed memory for determining the motor rotation speed is obtained by detecting the number of image synchronization signals stored and held for each detection pulse cycle time, and determining the data value based on the detected number of image synchronization signals. It is updated every routine execution cycle. As a result, the rotation speed of the motor is corrected and corrected for each minute distance amount of the motor rotation speed, and the rotation of the photosensitive drum is corrected so that the convergence correction is performed to a preset movement setting speed value. As a result, the rotation speed of the photosensitive drum is made uniform, and the pitch unevenness image, commonly called, is reduced or eliminated.

(Seventh Embodiment) Next, a seventh embodiment of the present invention will be described. The seventh embodiment of the present invention is a modification of the above-described sixth embodiment of the present invention,
As in the sixth embodiment, it is an object of the present invention to precisely move a moving medium at a preset moving set speed value to reduce or eliminate rotation unevenness that causes a pitch unevenness image.

Accordingly, in the seventh embodiment, similarly to the sixth embodiment, the speed fluctuation for each minute movement distance is recognized by using the detection sensor unit 107 which can recognize the minute movement distance of the photosensitive drum 101. By doing so, the rotational speed of the drum motor 103 that rotates the photosensitive drum 101 is corrected and corrected under predetermined conditions in accordance with the speed fluctuation detected for each minute movement distance.

The seventh embodiment is different from the sixth embodiment in that the seventh embodiment has a counting section for counting the number of image synchronization signals generated within a detection pulse period, and the number of image synchronization signals is used to detect the number of image synchronization signals. A counting unit that counts the period time of the detection pulse, instead of the moving medium speed determination unit that determines the degree of phase synchronization by comparing the period phase and the period phase of the line synchronization pulse, and an integer multiple N of the image synchronization signal A counting unit that counts the period time of the configured line synchronization pulse, and a moving medium speed determination unit that determines a phase synchronization state of each pulse period with a required time value calculated by each counting unit. Furthermore, a predetermined condition for recognizing a speed variation of the photosensitive drum 101 for each minute movement distance amount and correcting and correcting the rotation speed of the drum motor 103 is set. It is different.

Specifically, in the sixth embodiment, a value obtained by adding or subtracting a predetermined ratio based on the standard excitation time count value is set in a set rotation speed memory for determining the rotation speed of the motor unit, and the drum motor Is corrected and corrected for each minute movement distance. However, in the seventh embodiment, the absolute value obtained by calculating the difference between the measured detection pulse cycle time and the measured line cycle pulse cycle time by the difference time calculation unit is used. Is set in a set rotation speed memory that determines the rotation speed of the motor unit, and the rotation speed of the drum motor 103 is corrected and corrected for each minute movement distance.

Therefore, the motor rotation execution routine according to the seventh embodiment is the same as the third embodiment and the sixth embodiment shown in FIG. 10, and a description thereof will be omitted. Further, the hardware configuration such as the magnetic pattern shown in FIG. 14 and the configuration of the task format for controlling the execution of the program in the CPU 204 are the same as those in the sixth embodiment, and the description thereof will be omitted.

Hereinafter, the seventh embodiment of the present invention will be described with reference to the flowchart in FIG. still,
In the seventh embodiment, description of the same parts as in the sixth embodiment will be omitted.

In FIG. 16A, the port interrupt indicated by the detected pulse in 230 is different from that of the sixth embodiment in steps 261 and 262 and step 263.
Then, the counter unit that measures one cycle time of the detection pulse using the timer P is controlled. Specifically, step 2
At 61, the timer P operating at the detection pulse in is stopped, and
In step 262, the value at that time is stored and held in a memory called a memory P value. Then, in step 263, the value of the timer P is cleared, and the counting of the time of the timer P is started until the interruption of the detection pulse-in occurs again. As a result, one cycle time for each detection pulse is constantly updated and stored in the memory P value.

Next, in FIG. 16B, the port interrupt indicated by the BD signal IN at step 237 is also different from the sixth embodiment, and the image synchronization signal which is the BD signal is detected by the detection pulse. A control process is performed by a line synchronization pulse generator for detecting a line synchronization pulse, which is a unit of a predetermined integral multiple N, corresponding to a cycle, and a counter for measuring one cycle time of the line synchronization pulse. Execute Specifically, the number N of integer multiples of the BD signal is calculated in step 23
In step 271, a line synchronization pulse generation unit that counts by the increment operation of the counter A of FIG. 8 and determines whether or not it becomes one line synchronization pulse is configured. And an integer multiple N
If the number has not been reached, the interrupt processing ends in step 239.

On the other hand, if it is determined in step 271 that the number is an integral multiple N, the process proceeds to step 272, where the same processing as the detection pulse-in is executed using timer B.
3, 274, one cycle time of the line synchronization pulse is measured, and the measured value is stored in a memory called a memory B value.

Thereafter, in step 235, the counter A is cleared, and the counting operation of the integral multiple N is continued for detecting the next line synchronization pulse. As a result, one cycle time for each line synchronization pulse based on the BD signal is constantly updated and stored in the memory B value.

Finally, when the motor rotation correction routine 240 shown in FIG. 16C is executed, the execution of the motor rotation correction is confirmed in steps 241, 242 and 243 as in the sixth embodiment. Step 251 if the correction is executed
Move on to In step 251, it is determined whether or not the interrupted portion 106 </ b> B of the minute distance detection pattern unit 106 is moving the magnetic sensor 107 that outputs the detection pulse. Specifically, with respect to the time for moving the preset unit detection distance interval amount in which the minute distance detection pattern unit 106 is configured,
When it is determined that the predetermined time is exceeded, it is recognized that the movement of the interrupted portion 106B is in progress. This recognition is performed by determining whether the memory P value measured at any time by the detection pulse-in interrupt is equal to or more than the predetermined value. Just do it.

As a result of the determination in step 251, the interruption is 1
If it is determined to be 06B, the process proceeds to step 249,
Since the rotational movement speed correction of the photosensitive drum 101 cannot be executed, the standard excitation time count value is set in the set rotation speed memory and the set rotation speed in the appropriate rotation determination is determined in the same manner as in the sixth embodiment. The process is performed as instructed, the process returns to step 242 again, and the processes after step 242 are continuously executed. As a result, the rotation speed of the motor is reduced as shown in FIG.
As indicated by 0, the motor is controlled to rotate at a standard excitation time count value preset in a motor rotation execution routine.

On the other hand, if it is determined in step 251 that it is 106A that is not a break, the process proceeds to step 252 to perform a process of comparing and determining the periodic phase of the detected pulse and the line synchronization pulse. Specifically, by comparing a memory P value indicating one cycle time of the detected pulse measured for each port interrupt with a memory B value indicating one cycle time of the line synchronization pulse, the periodic phase state is determined. I do.

That is, if it is determined in step 252 that the memory P value is larger than the memory B value, the moving speed of the photosensitive drum 101 actually measured by the detection pulse is slower than the set speed, so that the image BD which is a synchronization signal
Recognizing that the signal is larger than the set integer multiple N, the difference time calculation unit that calculates the difference time between the detection pulse cycle time and the line synchronization pulse cycle time in step 253. Subtract the value. The absolute value of the calculation result is set as a difference time, and further subtracted from the standard excitation time count value, and a reduced value is set in the set rotation speed memory. This set instructs the operation of switching to the fast rotation under predetermined conditions in accordance with the determination that the moving speed of the photosensitive drum 101 with respect to the unit detection distance interval amount is the slow rotation at present.

If it is determined in step 252 that the memory P value is smaller than the memory B value, the moving speed of the photosensitive drum 101 actually measured by the detection pulse is faster than the set speed. Recognizing that the BD signal, which is a signal, becomes smaller than the set integer multiple N, the difference time calculation unit that calculates the difference time between the detection pulse cycle time and the line synchronization pulse cycle time in step 254. Subtract the B value. The absolute value of the calculation result is defined as the difference time, and further added to the standard excitation time count value.
Set the extended value to the set rotation speed memory value. In this set, an operation of switching to the slow rotation under a predetermined condition is instructed in accordance with the determination that the moving speed of the photosensitive drum 101 with respect to the unit detection distance interval amount is the current rotation at present.

After step 253 or step 254 has been processed, the process returns to step 242 in the same manner as after step 249, and the motor excitation is continuously corrected for each minute distance which is the unit detection distance interval. .

As described above, in the seventh embodiment, the phase synchronization between the detection pulse cycle time indicating the current moving speed and the line synchronization pulse cycle time to be moved by the image synchronization signal is determined. Then, the speed condition of the moving medium is determined, and the data of the set rotation speed memory value for determining the motor rotation speed is corrected by adding / subtracting the standard excitation time count value with the difference time of one cycle between the detection pulse and the line synchronization pulse Fix it. Therefore, the set rotation speed memory value for determining the motor rotation speed is updated every execution cycle of this routine. As in the sixth embodiment, the motor rotation speed is set to the motor excitation cycle time for each minute distance. The correction is corrected and the convergence is corrected to the set rotation speed of the photosensitive drum. As a result, the rotation speed of the photosensitive drum is made uniform, and the so-called pitch unevenness image is reduced or eliminated.

(Eighth Embodiment) Next, an eighth embodiment of the present invention will be described. The eighth embodiment of the present invention is a modified example of the seventh embodiment of the present invention. Similar to the sixth and seventh embodiments, a moving medium with a predetermined moving set speed value is accurately determined. An object of the present invention is to reduce or eliminate rotation unevenness that causes a pitch unevenness image by executing movement.

Therefore, in the eighth embodiment, similarly to the sixth and seventh embodiments, the speed for each minute movement distance is determined by using the detection sensor 107 capable of recognizing the minute movement distance of the photosensitive drum 101. By recognizing the fluctuation, the rotation speed of the drum motor 103 that rotates the photosensitive drum 101 is corrected and corrected under predetermined conditions set in advance according to the speed fluctuation detected for each minute movement distance.

The eighth embodiment is different from the seventh embodiment in that the setting content of a set rotation speed memory value, which is a predetermined condition for correcting and correcting the motor rotation speed, is different. That is, in the eighth embodiment, similarly to the seventh embodiment, a moving medium that compares the measured detection pulse cycle time with the measured line cycle pulse cycle time to determine the phase synchronization of each pulse. Although it has a speed determination unit, it differs in that predetermined conditions for subsequent correction of the motor rotation speed are different. Specifically, when the difference time of each pulse is calculated by the difference time calculation unit, a time value corresponding to a predetermined ratio of a preset absolute value is added to or subtracted from the standard excitation time count value.
This is the point to be set to the set rotation speed memory value. As a result, the rotation speed of the motor unit is corrected and corrected by a minute distance for each unit detection distance interval amount, and the rotation speed of the photosensitive drum is corrected for convergence.

Accordingly, the motor rotation execution routine according to the eighth embodiment is the same as that of the sixth embodiment shown in FIG. 10, and a description thereof will be omitted. Further, the hardware configuration such as the magnetic pattern shown in FIG. 14 and the configuration of the task format for controlling the execution of the program in the CPU 204 are the same as those in the sixth embodiment, and therefore the description thereof will be omitted.

Hereinafter, the eighth embodiment will be described with reference to the flowchart in FIG. In the eighth embodiment, the description of the same parts as those in the sixth and seventh embodiments will be omitted.

In FIG. 17A, the port interrupt indicated by the detection pulse in 230 is the same as in the seventh embodiment, but uses the minute distance detection pattern interruption detection unit described in the sixth embodiment. This is an example in which the cueing recognition with respect to the circumferential length of the photosensitive drum 101 is processed based on the count value of the counting unit that measures the time of one cycle of the detection pulse. That is, in the interruption processing of the detection pulse in this embodiment, the period of the detection pulse is measured in steps 261, 262, and 263 as in the seventh embodiment, and stored in the memory P value.

On the other hand, when the memory P value is determined to be longer than one cycle time of the preset detection pulse at step 265, the interruption position start flag is set at step 234. Set it,
The flag is operated so that the cue timing can be recognized. As described in the sixth embodiment, the cueing section for the circumference is a processing which is not related to the present invention, but is not particularly limited as described by applying the configuration of the present embodiment. It is.

Next, the BD of 237 shown in FIG.
This is a port interrupt indicated by signal-in, which detects a line synchronization pulse composed of an integral multiple N of the BD signal and measures one cycle time thereof, which is equivalent to the seventh embodiment. Then, the cycle time of the line synchronization pulse is stored and updated in the memory as the memory B value as in the seventh embodiment.

Finally, when the motor rotation correction routine 240 shown in FIG. 17C is executed, the execution of the motor rotation correction is recognized in steps 241, 242, and 243 as in the seventh embodiment. In step 251, it is determined whether or not the interrupted portion 106 </ b> B of the minute distance detection pattern unit 106 is moving the magnetic sensor 107 that outputs the detection pulse. If it is interrupted, the process proceeds to step 249 as in the seventh embodiment, sets the standard excitation time count value in the set rotation speed memory, and instructs the motor to execute rotation at a preset cycle time. .

On the other hand, in step 251,
If it is not B, the process proceeds to step 252, and the seventh
In the same manner as in the first embodiment, the moving medium speed determination processing for comparing and determining the degree of the periodic phase between the detection pulse and the line synchronization pulse is executed. When the memory P value is larger than the memory B value, the moving speed of the photosensitive drum 101 measured by the detection pulse of the magnetic sensor 107 is slower than the set speed, so that the BD signal as the image synchronization signal is Integer multiple N of setting
Recognizing that the number is larger than the number, the difference time between the detection pulse cycle time and the line synchronization pulse cycle time is calculated in step 256, and the difference time calculation is performed to make the calculation result a predetermined ratio. . That is, the memory B value is subtracted from the memory P value, and a difference time calculation is performed such that the difference value is multiplied by, for example, 30% of a predetermined ratio.
Then, the absolute value of the calculation result is set as a difference time, and further subtracted from the standard excitation time count value, and the reduced value is set in the set rotation speed memory. As a result, an operation to switch to the fast rotation within a predetermined time is instructed according to the determination that the moving speed of the photosensitive drum 101 with respect to the unit detection distance interval amount is the slow rotation at present.

On the other hand, if it is determined in step 252 that the memory P value is smaller than the memory B value, the BD signal is output because the moving speed of the photosensitive drum 101 actually measured by the detection pulse is higher than the set speed. Recognizing that it becomes smaller than the integer multiple N of the setting, the difference time between the detection pulse cycle time and the line synchronization pulse cycle time is calculated in step 257 in the same manner as described above. Then, the absolute value of the calculation result is added as a difference time to the standard excitation time count value, and the extended value is set in the set rotation speed memory. As a result, an operation to switch to the slow rotation under a predetermined condition is instructed in accordance with the determination that the moving speed of the photosensitive drum 101 with respect to the unit detection distance interval amount is the early rotation at present.

Then, after processing in step 256 or step 257, the process returns to step 242 in the same manner as after the processing in step 249, and the motor excitation is continuously corrected for each minute distance which is the unit detection distance interval. I do.

As described above, in the eighth embodiment, the phase synchronization between the detection pulse cycle time indicating the current moving speed and the line synchronization pulse cycle time to be moved by the image synchronization signal is determined. Determines the moving speed of the moving medium and determines the motor rotation speed. The data of the set rotation speed memory is counted as the standard excitation time, and the calculated value for a predetermined ratio of one cycle difference time between the detection pulse and the line synchronization pulse is counted. Correction and correction are performed by adding and subtracting values. This allows
The set rotation speed memory value that determines the motor rotation speed is updated every execution cycle of this routine. As in the sixth embodiment, the motor rotation speed corrects the motor excitation cycle time for each minute distance. By doing so, the convergence correction is made to the set rotation speed of the photosensitive drum 101. As a result, the rotation speed of the photosensitive drum 101 is made uniform, and the pitch unevenness image commonly known is reduced or eliminated.

(Ninth Embodiment) Next, a ninth embodiment of the present invention will be described. The ninth embodiment intends that the rotation speed control of the motor unit for executing the movement of the moving medium is not performed by maintaining the set speed of the motor alone, but on the surface of the moving medium or equivalently. Measures the moving speed on the auxiliary member surface for each minute unit distance amount, compares the measured moving speed with the set speed, recognizes the current moving speed, and sets the target speed value to the set speed value. The motor rotation speed correction processing for correcting the excitation cycle time of the rotation speed control of the motor unit so that the motor unit speed can be maintained. Eliminating interruption of the motor rotation speed correction process caused by a discontinuity in the minute distance detection pattern portion when configuring with a movement unit distance setting amount that is easy to perform and that can accurately perform speed correction. Rukoto is possible to realize a selection switching control of the detection signals by the arrangement and the sensor detecting portion of the minute distance detection pattern unit.

According to the characteristic structure of the ninth embodiment, the motor rotation speed correction control system of the motor unit for executing the movement of the moving medium can be realized at lower cost, and the motor speed can be reduced by the interruption of the minute distance detection pattern unit. It is possible to eliminate the interruption of the correction of the speed of the motor rotation, etc., thereby realizing a high-precision constant moving speed of the moving medium on the surface.

Hereinafter, the ninth embodiment will be described with reference to FIGS.

FIG. 18 is a functional block diagram showing the configuration of the motor speed control device according to the ninth embodiment. Here, reference numeral 101 denotes a photosensitive drum, which is one of moving media, and 10
Reference numeral 2 denotes a gear arrangement as a motor power transmission unit; 103, a pulse motor as one of the motor units for rotating the photosensitive drum 101; 104, a motor driver IC for driving the pulse motor 103;

Reference numerals 304 and 306 denote magnetic patterns which are pattern portions for detecting minute distances.
A pair of disks (auxiliary members) coaxially attached to one end of a disk
Are formed on the peripheral surface of the
B and 306B are configured in a positional relationship where they are attached at different angles as shown in FIG. Further, a magnetic pattern forming portion 304A of each magnetic pattern,
306A, as shown in the figure, is configured so that at least two of them can be continuously detected for one round of the photosensitive drum 101 to detect a minute unit distance amount. Numerals 105 and 107 denote magnetic sensors serving as sensor detectors, which are arranged so as to correspond to the magnetic patterns 304 and 306 on a one-to-one basis. The magnetic sensors 105 and 107 are, specifically, magnetic sensors called MR sensors, which capture a change in the state of the S pole and the N pole of the magnetic patterns 304A and 306A and convert them into electric signals.

Reference numeral 125 denotes an optical box unit, which is an optical scanning unit that irradiates the photosensitive drum 101 with light by rotating a laser beam that blinks in accordance with an image signal emitted from the semiconductor laser 128 by a polygon mirror 129 having a mirror surface. Unit.

Reference numeral 310 denotes a CPU, which is a photosensitive drum 1
The detection signals indicating the current speed of No. 01 are supplied to the magnetic sensors 305 and 3.
07, the processing of the distance operation block indicated by 311 to 316 is executed, and the corrected motor excitation is output to the motor driver 104. The function block 31
Parts 1 to 316 are expressed to make the control internal processing easier to understand, and will be described in detail by the execution operation of a program of the CPU 310 described later.

Next, before describing the operation of the present embodiment,
The configuration of the magnetic pattern which is the basis of the present invention will be described. Magnetic patterns 304 and 30 in the present embodiment
Reference numeral 6 represents an example in which it is attached to an auxiliary member corresponding to the moving medium surface 101, but it may be directly attached to the surface of the photosensitive drum 101. Also, the magnetic sensor 305,
Regarding 307, non-contact or contact may be used as long as it is adjacent to the magnetic patterns 304 and 306. However, the discontinuous portion 304 of each of the magnetic patterns 304 and 306
B and 306B are attached at an arbitrary angle difference without overlapping. Further, the magnetic patterns 304, 30
The magnetic pattern forming portions 304A and 306A of No. 6 may be overlapped, but are attached so that any one of the magnetic pattern forming portions exists in the circumference of one circumference of the photosensitive drum 101.

The magnetic pattern forming sections 304A and 306
The set distance amount of the minute unit distance amount included in A may be constituted by a distance amount of one line of an image or several lines, or may be constituted by a distance amount of one excitation of a motor or several excitations. Although not particularly limited in the present embodiment, in any case, the fact that a distance amount that is an integral multiple of a certain set distance amount becomes equal to the circumferential length of the photosensitive drum 101 in the moving direction is equal to the intersection of the set distance amounts. Is impossible if you include
Since a fraction is generated, the magnetic patterns 304 and 306
Have breaks 304B and 306B.

A method for determining the breaks 304B and 306B from the magnetic pattern will now be described. If the detection signals generated from the magnetic sensors 305 and 307 are used, the magnetic pattern forming unit 3
When the photoconductors 04A and 306A are moving, it is possible to read the state change of the photoconductor drum 101 based on a predetermined cycle time determined by the rotation speed (including the deviation) of the photoconductor drum 101. That is, when the detection signal changes in a predetermined cycle time determined from the speed of the photoconductor drum 101 and the set distance amount of the magnetic pattern forming units 304A and 306A, the photoconductor drum 101 moves to the positions of the interruption portions 304B and 306B. It can be determined that it has not been done. Conversely, if there is no change in the detection signal even after the predetermined cycle time (including the deviation) or more, it can be determined that it is the start position of the breaks 304B and 306B.

As described above, in this embodiment, the pattern portions 304 and 306 for detecting minute distances with breaks are provided.
And two sensor detectors 305 and 307, and each of the discontinuous portions 304B, 3B of the minute distance detection pattern portion.
The positions of the attachment positions are configured so that the positions of 06B do not overlap. Then, as will be described later, the rotational speed of the motor unit 103 is corrected based on the electric signal generated by one sensor detection unit arbitrarily selected in this configuration, and the start of the discontinuity is selected in the selected electric signal. As soon as the position is determined, it is switched to the electric signal generated by the other sensor detecting section, thereby obtaining a continuous electric signal and continuously correcting the rotation of the motor section.

Subsequently, the function block portions 311 to 316 in FIG. 18 will be described.

Photosensitive drum 101 in electrophotographic apparatus
In some cases, the rotation of the pulse motor 103 may be shared with the conveyance of the print paper. However, in the present embodiment, a pulse motor 103 called a drum motor is independently configured exclusively for the photosensitive drum 101 for ease of explanation. I will explain in the case of
By devising the configuration of the gear arrangement 102 and the like, a configuration may be used in which the photosensitive drum and the print paper are shared, and the configuration of the motor is not particularly limited. Further, the type of the motor is not limited as long as the rotation speed can be corrected at a small speed.

In FIG. 18, detection signal selection section 311
First, an arbitrary selection unit selects one detection signal generated from the magnetic sensor 305 or the magnetic sensor 307, and transmits the selected detection signal to the break position determination unit 312 and the minute distance / speed determination unit 313. Very small distance speed determination unit 313
Measures a predetermined period of time for each minute unit distance in the selected detection signal. The measured cycle time is compared with a preset cycle time value of the photosensitive drum 101 by the speed comparator 314.

On the basis of the comparison result, the motor rotation correction section 315 executes a calculation determined under predetermined conditions from a set standard value which is a preset excitation cycle time of the photosensitive drum 101, and executes the motor rotation. The next excitation cycle time for correcting the speed is calculated. The motor excitation unit 316 transmits the next excitation output signal of the motor to the motor driver 104 based on the calculated next excitation cycle time. This allows
The pulse motor 103 rotates at a rotational speed corrected according to the current speed of the minute unit distance, and the photosensitive drum 1
The rotation speed of 01 is converged and corrected to the set constant speed.

On the other hand, the break position determining unit 312 determines the break position (304B, 306) based on the selected detection signal.
When the start position of B) is determined, the detection signal switching unit of the detection signal selection unit 311 is operated to immediately switch to the detection signal generated by the other magnetic sensor. Accordingly, the minute distance speed determination unit 313 can continuously receive the detection signal without interruption, so that the rotation speed correction of the pulse motor 103 can be similarly continuously executed without interruption.

Further, the interruption position determination section 312 repeats the operation of switching to the other detection signal every time the start position of the interruption section is determined based on the selected detection signal, so that the photosensitive drum 101 rotates. In such a case, it is possible to execute the rotational speed correction which is always continued.

Next, the processing of a specific program executed by the CPU 310 will be described with reference to the flowcharts of FIGS. 19, 20, 21, and 22.

FIG. 19 is a flowchart showing a program process which is a motor rotation execution portion and is called a motor rotation execution routine 320 in a program process corresponding to the motor excitation unit 316. FIG. 20 shows a motor excitation correction part, in which a motor rotation correction part 315 and a speed comparison part 31 are shown.
9 is a flowchart showing a program process corresponding to step No. 4 and called in a motor excitation correction routine 330. FIG. 21 shows an event timer routine 350 which the CPU 310 manages by itself, which is a routine for processing time management required when executing various task programs, and mainly performs various timer interrupt processing. In this embodiment, for the sake of explanation, only the necessary timer processing and the flag processing relating to the timer processing will be described in detail.

FIG. 22 is a processing program for capturing the cycle of the detection signal generated by the magnetic sensors 305 and 307 using the port interrupt function of the CPU 310, using a very common port interrupt. .
In the present embodiment, the condition under which a port interrupt occurs is not limited. For example, the present embodiment is used in a configuration in which an interrupt occurs at the rise of a detection signal. That is, the detection signal generated by each magnetic sensor generates an interrupt as soon as the signal state changes, and each time an interrupt is generated indicates the cycle time of the detection signal.

Hereinafter, description will be made with reference to the flowchart in FIG. The software processing method of the CPU 310 according to the present embodiment is a program processing in which parallel processing can be executed by having a task form. Depending on the monitor program that scans. Therefore, the program in the task according to the present embodiment is represented by a description along one flow. That is, the description form for each task can be represented by closed loop processing within one task.

The flowchart of FIG. 19 is a motor rotation execution routine, and shows the contents of the motor excitation unit 316 for executing the rotation of the pulse motor 103. Pulse motor 1
The motor excitation unit 316 of 03 normally executes the next excitation every time the motor excitation cycle time is set as a fixed data value, but in the case of the present embodiment, it is set in advance. The next excitation of the motor excitation is executed by the contents of the memory storing the motor excitation cycle time. The feature is that the motor excitation cycle time is made flexible by rewriting the contents of this memory. Therefore, the functions of the motor excitation unit other than the function of making the motor excitation cycle time flexible are not particularly limited since an extremely general method and method are used.

When the motor rotation execution routine 320 is entered, initialization is executed in steps 321 and 322 to execute motor rotation. Note that the excitation cycle time memory, which is a memory unit that indicates a flexible motor excitation cycle time, which is one of the features of the present embodiment, has a set standard value calculated from a preset motor rotation speed as an initialization data value. The excitation is executed at the time indicated by the set standard value until a time data value called "sound data" is stored and the motor rotation correction control is started.

Then, in step 323, an instruction to rotate the motor is determined.
At 24, a slow-up excitation for starting motor rotation is executed. On the other hand, if there is no motor rotation instruction, step 32
The process loops until a motor rotation instruction is issued in step 3.

When the slow-up excitation is completed, the process proceeds to step 325, where the data value of the excitation cycle time memory is set in the excitation counter. Then, it is determined in step 326 that the time is up. If the time is up, the next excitation output is executed in step 327. As a result, the motor excitation unit of the present embodiment can execute excitation with a flexible cycle time based on the contents of the excitation cycle time memory,
The number of rotations of the motor unit 103 can be operated. The details of the setting of the excitation cycle time memory will be described later with reference to FIG.

When the next excitation is executed, it is determined in step 328 that the execution of the motor rotation has been completed. If the motor rotation is to be continued, the process returns to step 325 again, and the same processing as described above is repeated. When the execution of the motor rotation is completed, slow down excitation is executed in step 329, and
Thereafter, the process returns to step 321 to repeat the same processing as described above.

As described above, this motor rotation execution routine executes the motor rotation according to the contents of the excitation cycle time memory set in another routine, and is based on the execution result of the motor rotation speed correction control described below. The motor rotation is executed according to the data content of the set excitation cycle time memory.

The flowchart of FIG. 20 is a motor excitation correction routine. In order to set the data content of the excitation cycle time memory for the motor rotation speed correction control of the pulse motor 103, the speed comparison unit 314 uses the current minute unit. The following describes a processing procedure in which the speed is compared with the set speed, and the motor rotation speed correction unit 315 calculates and calculates the excitation cycle time based on the comparison result.

When the motor excitation correction routine 330 is entered, it is checked in step 331, step 332, or step 333 whether or not motor rotation correction can be executed. If possible, the process proceeds to step 334. If there is, loop and wait. Thereafter, when the process proceeds to step 334, the speed comparison unit 314 compares a memory data value called a unit speed time memory processed by another routine with a preset standard value.

The contents of the unit speed time memory indicate the minute unit distance other than the interruption from the magnetic sensor 305 or 307 to be received in the CPU event timer interrupt routine and each port interrupt routine to be described later.
This is a period time amount based on the detection pulse, and indicates a current minute moving speed on the surface of the photosensitive drum 101.

From the comparison result of step 334, when the content of the unit speed time memory is smaller than the set standard time, it is determined that the current rotational speed is high, and step 33
Then, the process proceeds to 6 to add a predetermined time for setting the motor rotation speed to the slow rotation setting, thereby calculating and calculating the next excitation setting time of the motor 103.

On the other hand, when the content of the unit speed time memory is larger than the set standard time from the comparison result in step 334, it is determined that the current rotational speed is low, and in step 338, the motor rotational speed is set to the fast rotational setting. By performing subtraction of a predetermined time for performing the operation, the next excitation set time of the motor 103 is calculated and calculated.

Further, if it is determined from the comparison result in step 334 that the contents of the unit speed time memory are substantially equal to the set standard time within a certain predetermined range, step 33 is executed.
In step 9, the time of the set standard value is held as it is.

Then, Step 336, Step 33
8. In step 340, the motor excitation cycle time corrected in any of step 339 and step 339 is stored as the content data value of the excitation cycle time memory. As a result, the corrected motor excitation cycle time is always updated with the latest calculation and calculation contents each time the next excitation for motor rotation is performed in the motor rotation execution routine of FIG. Photoconductor drum 10 for each minute unit distance on the surface
1 is corrected and the convergence is corrected to the set speed value.

The above steps 336 and 33
8. The calculation unit of the content of the periodic time to be corrected described in step 339 is merely an example, and is not intended by the present invention. Therefore, the calculation unit of the correction value is particularly limited. is not.

Finally, with reference to the flow charts of FIG. 21 and FIG. 22, the processing procedure of the break position determining section 312, the detection signal switching section 311 and the minute distance / speed determining section 313 will be described.

The flowchart of FIG.
Is an interrupt processing routine 350 for executing event timer processing, which is necessary for executing its own control operation, and is mainly for executing timer processing and its flag processing. Therefore, in this embodiment, only the unit speed timer and the interruption detection timer related to the control and the flag operation thereof will be described. In this event timer interrupt, an interrupt is generated every time a predetermined minute time elapses based on a CPU operation clock source (not shown). In the present invention, a count value corresponding to the interrupt cycle time is calculated. The interrupt cycle time is not particularly limited and may be considered.

When an event timer interrupt occurs, execution of other various timers is performed in step 351, and the flow proceeds to steps 352 and 353.
The counting for each minute time elapse interrupt is executed by the unit speed timer and the interruption detection timer, and it is determined in step 354 whether or not only the interruption detection timer value is equal to or more than a predetermined value. This determination corresponds to the determination of the break position determination unit 312, and determines whether or not the start positions of the break portions 304B and 306B have been reached based on the value of the break detection timer counted up earlier. Will be described later.

If the value of the interruption detection timer is equal to or greater than the predetermined value in step 354, the interruption sections 304B and 30
It is determined that it is the start position of 6B, the state of the selection flag is inverted at step 355, and this routine ends at step 356.

Next, the flowchart of FIG. 22 is a port interrupt processing routine 360, 362 which receives a detection pulse generated by each of the magnetic sensors 305, 307 as an input. Has functions. When an interrupt is generated by the detection signal, a corresponding interrupt process is started. Then, step 361
Alternatively, in step 363, the selection flag is determined, and only when the detection signal is the currently selected detection signal, step 365 is performed.
Otherwise, in step 364, the present interrupt processing ends. That is, the detection signal which is not currently selected is shaken off and ignored here.

In the case of proceeding to step 365, the value of the interruption detection timer is cleared as an interruption for each cycle of the selected detection signal, and in step 366, the unit speed timer value of the minute distance speed determination unit 313 is compared with the speed comparison value. The data is stored in the unit speed time memory used by the unit 314. Then, in step 367, the unit speed timer value is cleared, and in step 368, the present routine ends.

With the above processing, the interruption position determination unit 3
12 measures the elapsed time in the event timer processing of the interruption detection timer, and resets the elapsed time in the detection interruption processing of the detection signal that is made valid, so that the interruption section 3
It is determined that the start position has been reached at 04B and 306B.

That is, when the valid detection signal is moving through the pattern forming units 304A and 306A for detecting the minute unit distance amount, the interruption detection timer is switched every time the valid detection signal is port interrupted. Since the count value is cleared, it does not correspond to the determination of step 354 for a predetermined time or more.

On the other hand, if the valid detection signal is
04B and 306B, the port interrupt processing of the valid detection signal is not executed, so that the count value of the interruption detection timer counts up to the elapsed time of the event timer processing, and eventually reaches a predetermined time or more. 3
It is determined at 54 that the start position of the breaks 304B and 306B has been reached. Then, by inverting the content of the selection flag at step 355, which is a detection signal switching unit, the other detection signal is made valid and the currently selected detection signal is made invalid.

Therefore, the value of the predetermined time described in step 354 is a time that can be clearly distinguished, including the deviation of the cycle time generated by the pattern forming units 304A and 306A that detect the minute unit distance, and the like. In addition, a time setting is set such that an unnecessary delay time is not added to the start positions of the breaks 304B and 306B.

On the other hand, the minute distance speed judging section 313 stores the value of the unit speed timer in the unit speed time memory every time the port interrupt processing of the detection signal validated in step 366 is executed, and also executes step 367. Clears the value of the unit speed timer counted by. Further, in the event timer interrupt processing in step 351, the elapsed time of each occurrence of the port interrupt of the detection signal validated by the unit speed timer is counted, so that the pattern forming units 304 A and 306 A have each minute unit distance. The elapsed time will be measured.

[0311] Further, a continuous detection signal can be obtained by the interruption position determination unit 312 and the detection signal switching unit 311.
The unit speed of the present minute unit distance updated with the latest information without interruption is stored every time a port interrupt occurs due to a valid detection signal.

The above is the processing content in the ninth embodiment. Accordingly, the rotation speed control of the pulse motor 103 for driving the photosensitive drum 101 is performed without interruption, and the magnetic patterns 304 and 306 have continuous detection signals for each minute unit distance from the photosensitive drum 101. Irrespective of the magnitude of the distance between the sections 304B and 306B, it can be obtained stably at all times. Therefore, the convergence correction of the motor rotation speed correction unit 315 that corrects the motor excitation cycle time is always executed based on the cycle time of the detection signal.

(Tenth Embodiment) Next, a tenth embodiment of the present invention will be described.
Embodiment 0 will be described. The tenth embodiment of the present invention is a modification of the ninth embodiment of the present invention. As in the ninth embodiment, the rotation speed control of the motor unit that executes the movement of the moving medium is controlled by a single motor. It is not due to the maintenance of the set speed in the above, but the movement speed on the moving medium surface or the equivalent auxiliary member surface is measured for each minute unit distance, and the measured movement speed is compared with the set speed. Then, by recognizing the current moving speed, a motor rotation speed correction process for correcting the excitation cycle time of the rotation speed control of the motor unit is executed so that the target speed value can maintain the set speed value. In particular, when the minute unit distance amount on the surface of the moving medium or the like is configured with the moving unit distance setting amount that makes it easy to correct the speed of the motor unit and that the speed can be corrected accurately, Pattern part has Discontinuation of the motor rotation speed correction process caused by the cutout is eliminated, and the arrangement configuration of the micro-distance detection pattern section that can maintain the continuous rotation speed correction of the motor section and the selection switching control of the detection signal by the sensor detection section. The intention is to make it happen.

The difference from the ninth embodiment is as follows. That is, in the ninth embodiment, when a plurality of magnetic patterns are attached so as not to overlap the respective positional relationships of the interrupted portions having the respective magnetic patterns, and when the interrupted portion is determined based on the detection signal from the selected magnetic pattern, another The control is performed to switch to the detection signal generated by the magnetic pattern. That is, in the ninth embodiment, the interrupted portions 304B,
Each time the start position of 306B is determined, the detection signal is switched to another detection signal, and the selection switching control for relaying ensures that the detection signal for the motor rotational speed correction control can always be continued.

On the other hand, in the tenth embodiment, each positional relationship of the discontinuous portions of each of the plurality of magnetic patterns is attached at a predetermined angle, and initially, the detecting signal from the arbitrarily selected magnetic pattern is interrupted. When the part is determined, the detection signal is switched to the detection signal from the next magnetic pattern in accordance with the order positioned at the predetermined angle, and the detection signal of the next magnetic pattern is used to determine the predetermined angle and the predetermined angle. In accordance with a predetermined set time calculated from the moving speed of the photoconductor drum, every time the predetermined set time elapses, the detection signal is switched to the detection signal from the next magnetic pattern positioned in the order positioned at the predetermined angle.
In other words, once the start position timing of the interruption part is captured, the motor is controlled by switching to another detection signal located next to the next detection signal in the order of being positioned at the predetermined angle for each predetermined time period from then on. The detection signal for the rotational speed correction control is ensured in a state where it can be continued at all times.

The functional blocks of the motor speed control device of the tenth embodiment are the same as those of the ninth embodiment shown in FIG. However, in the case of the ninth embodiment, an example in which a plurality of magnetic patterns and a plurality of magnetic sensors are configured has been described.
In the tenth embodiment, an example in which three sets of a plurality of magnetic patterns and magnetic sensors are configured will be described. Therefore, the detection signal selection unit 311 in FIG. 18 is configured to receive three detection signals. Further, in the ninth embodiment, as shown in FIG. 18, each magnetic pattern is attached so that the positional relationship of the breaks does not overlap, whereas in the tenth embodiment, The positional relationship between the discontinuities (not shown) of the three magnetic patterns is configured such that a predetermined angle set in advance is attached at 120 degrees.

Note that, similarly to the ninth embodiment, the tenth embodiment is not limited to the electrophotographic apparatus, the photosensitive drum, and the like described in the embodiment, but a sensor for detecting a minute unit distance of a moving medium. The type of the detection unit, the motor unit, and the like, and the calculation / calculation unit of the minute moving distance / speed information are not similarly limited. In addition, the motor rotation execution routine and the motor excitation correction routine in the tenth embodiment are the same as those in the ninth embodiment, and a description thereof will not be repeated.

Hereinafter, the tenth embodiment will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. here,
In the tenth embodiment, description of the same portions as in the ninth embodiment will be omitted.

The flowcharts of FIG. 23 and FIG.
Break position determination unit 31 representing the features of the tenth embodiment.
2 shows the processing procedure of the detection signal switching unit 311 and the minute distance / speed determining unit 313. The flowchart in FIG. 23 is an event timer interrupt routine 350 for executing time management, which is necessary for the CPU 310 to execute its own control operation. The event timer interrupt routine 350 mainly processes timer management as in the ninth embodiment. ing. The flowchart of FIG. 24 is a port interrupt routine 380, 383, and 386 for generating an interrupt every cycle of the detection signal generated by the magnetic sensor. In the present embodiment, the port interrupt routine has three detection signals. Similarly, three interrupt executions are provided.

In FIG. 24, steps 381, 38
The selection counter checked at 4,387 is one for each magnetic sensor corresponding to each break of three magnetic patterns attached at a predetermined angle (120 degrees) set in advance.
The values corresponding to one-to-one are assigned without duplication. Therefore, the value indicated by the selection counter indicates the selected detection signal.

Further, this selection counter is executed as an optional selecting section for setting the initial set value to an arbitrary value by initializing the memory of the CPU 310 when the power is turned on. When the power is turned on, the selection counter set to an arbitrary value first selects a detection signal arbitrarily selected by the start of motor rotation. On the other hand, each detection signal causes each port interrupt to be generated at the start of motor rotation, but only the detection signal selected by the selection counter moves to step 366.
In steps 385 and 388, the port interrupt processing ends.

If a port interrupt has occurred due to the selected detection signal, the flow shifts to step 366, where the unit speed timer value is stored in the unit speed time memory as in the ninth embodiment. Clear the value and end the port interrupt processing.

On the other hand, in the event timer interrupt processing shown in the flowchart of FIG. 23, when an interrupt occurs at every set timer interrupt time, as in the ninth embodiment,
In step 351, execution processing of other various timers is performed. Thereafter, the process proceeds to step 352, where the unit speed timer is incremented and the unit speed time is counted.

In the case of the present embodiment, the break position judging section 312 uses the break detection timer to determine the position of the break portion only for the detection signal selected first, as in the ninth embodiment. However, once the position of the interrupted portion can be confirmed, a predetermined selection time based on the time required to move the predetermined movement amount at the predetermined angle that has been confirmed is recognized each time, and the detection signal of the currently selected detection signal is subsequently recognized. Skip the position of the break. As a result, the detection signals are switched in accordance with the predetermined order of the magnetic patterns attached at the predetermined angle in the cycle of the predetermined selection time, and the continuous detection signal is continuously given to the motor rotation correction control.

The switching section based on the predetermined selection time period is
A switching unit, which is a second detection signal switching unit that performs switching based on the determination of the former break position determination unit 312, is a first detection signal switching unit.
Is a detection signal switching unit. The second detection signal switching unit checks in step 370 whether the selection timer is valid, thereby determining whether the first or second switching unit is currently used, and determines whether the first or second switching unit is in use. When the switching unit is used, the process proceeds from step 370 to step 372, where it is checked whether or not the position of the break of the detection signal selected by the optional selecting unit has been recognized.

At first, since the interruption recognition flag has not been set, the flow shifts to step 353 to execute the counting of the interruption detection timer in the same manner as in the ninth embodiment. Is determined, and if it is not longer than the predetermined time, the processing routine ends in step 356.

On the other hand, if it is determined in step 354 that the time is equal to or longer than the predetermined time, the first switching unit is executed, and the subsequent execution of the switching is passed on to the second switching unit. Specifically, the execution of the first switching unit is passed to the second switching unit by setting the interruption recognition flag in step 373, and the interruption detection timer value is cleared in step 374, and the interruption position determination unit The operation of 312 ends. Further, at step 375, the selection counter is advanced by one, the detection signal is switched to the detection signal located in the next order, and at step 376, an operation of effectively setting the selection time timer is executed, and step 356 is executed.
By ending this process once, the execution of the first switching unit is ended.

The second switching unit, which has taken over the execution of the switching of the detection signal for selecting the second switching unit from the first switching unit, shifts from step 370 to step 371 to recognize the set selection time period. The selection time timer is incremented, and the routine goes from step 372 to step 377. Then, in step 377, it is determined whether or not the selection time timer has expired, thereby determining whether or not to switch to the next sequential detection signal. If the selection time timer has not reached the set selection time, step 35
When the selected time timer has reached the set selection time, the selected time timer is cleared in step 378, and the next switching timing time is counted up, and then the selection is made in step 379. The counter is incremented, and switching to the next detection signal is executed. Thus, also in the tenth embodiment, similarly to the ninth embodiment, it is possible to prevent the detection signal from being interrupted due to the break, and to receive the detection signal that is always continued.

As described above, the selected detection signal is sent from the first switching section to the second switching section and further to the second switching section.
The switching unit performs the switching every set selection time period, so that the current photosensitive drum speed can be measured by the relay of the continuous and continuous detection signal. For this reason, the motor rotation speed correction control is also continued, and
Correction is performed to converge the rotation of the photosensitive drum 101 to the set speed. That is, the rotation speed control of the pulse motor 103 for driving the photoconductor drum 101 is such that the continuous detection signal without interruption is always stable regardless of the magnitude of the interval distance of the interruption portion of the magnetic pattern. Therefore, the motor rotation speed correction for convergence correction of the motor excitation cycle time based on the cycle time of the detection signal is always executed.

(Eleventh Embodiment) Next, the first embodiment of the present invention will be described.
One embodiment will be described.

[0331] The eleventh embodiment of the present invention is a modification of the ninth embodiment of the present invention. The intention of the eleventh embodiment is to move the moving medium in the same manner as in the ninth embodiment. Regarding the rotation speed control of the motor unit to be executed, it is not based on maintaining the set speed of the motor alone, but measuring the movement speed on the moving medium surface etc. for each minute unit distance amount, and comparing the measured value and the set speed By recognizing the current traveling speed by comparison,
In executing the motor rotation speed correction processing for correcting the excitation cycle time of the rotation speed control of the motor unit so that the target speed value can maintain the set speed value, a minute unit distance amount on a moving medium surface or the like. The minute distance detection pattern section that can maintain the rotation speed correction of the motor section without the correction state of the rotation speed correction of the motor section caused by the interruption of the detection etc. due to the interruption of the magnetic pattern that can detect the An object of the present invention is to realize control of selection switching of a detection signal by an arrangement configuration and a sensor detection unit.

The difference between the eleventh embodiment and the ninth embodiment is as follows. That is, in the ninth embodiment,
A plurality of magnetic patterns are mounted such that the respective positional relationships of the breaks are not overlapped, and if a break is determined in the detection signal from the selected magnetic pattern, control is performed to switch to a detection signal generated by another magnetic pattern. I have.
In other words, each time the start position of the break is determined, the detection signal for the correction control of the motor rotational speed is secured in a state that can be continued by selection switching control in which the detection signal is switched to another detection signal and relayed. .

On the other hand, in the eleventh embodiment, the respective positional relationships of the interruption portions of the plurality of magnetic patterns are not particularly set, and the switching section of the detection signal and the interruption position judging section are not provided. Without having, to capture detection signals from all received magnetic patterns, having a plurality of magnetic patterns, and a minute distance speed determination unit and a speed comparison unit that can correspond to the magnetic sensor on a one-to-one basis, Further, an average value calculation unit is newly provided, an average value of the results from the plurality of speed comparison units is calculated, and the excitation cycle time of the motor rotation is corrected from the average value. However, it must be configured so as to be able to receive a detection signal by at least one magnetic pattern by attaching so as to avoid that all the interrupted portions of the plurality of magnetic patterns are all overlapped at the same position.

That is, in the eleventh embodiment, a magnetic signal that moves along a discontinuous portion so that the current speed information of the photosensitive drum can be taken in with a detection signal generated by at least one of the plurality of magnetic patterns. Except for the detection signal generated by the pattern, all the valid detection signals are taken in, and the calculation result is averaged from the speed comparison unit, and the results from the detection signals are integrated. Later, the correction control of the motor rotation speed is executed.

Therefore, in the eleventh embodiment, similarly to the ninth embodiment, it is possible to ensure that the detection signal for the motor rotational speed correction control can always be continued. still,
Similarly to the ninth embodiment, the eleventh embodiment is not limited to the electrophotographic apparatus, the photosensitive drum, and the like described in the embodiment, and also includes a sensor detection unit that detects a minute unit distance amount of a moving medium. Similarly, the types of the motor and the motor unit and the like and the calculation and calculation unit of the minute moving distance / speed information are not limited in the same manner.

Hereinafter, the eleventh embodiment will be described with reference to FIGS. 25 to 27. In the eleventh embodiment, the same parts as those in the ninth embodiment will not be described.

FIG. 25 is a functional block diagram showing the configuration of the motor speed control device according to the eleventh embodiment. FIG.
The difference from the configuration of the ninth embodiment shown in FIG. 8 is that the detection signal selection unit 311 and the break position determination unit 312 are deleted, and instead, the minute distance speed determination units 313 and 317 and the speed comparison units 314 and 318 The difference is that a combination of N magnetic patterns and magnetic sensors is added, and further, an average value calculation unit 319 that combines results from a plurality of speed comparison units into one is added. Note that the minute distance / speed determination units 313, 317
18 has the same function as the minute distance speed determination unit 313 in FIG. 18, and the speed comparison units 314 and 318 are the same as the speed comparison unit 3 in FIG.
It has the same function as 14.

With this configuration, motor rotation correction section 315
Is different from the ninth embodiment in that the motor excitation cycle time is not corrected based on a speed comparison result from one selected detection signal, but is based on a plurality of speed comparison results from a detection signal that is not a break position. The motor excitation cycle time can be corrected. However, also in the eleventh embodiment, the mounting positional relationship of each magnetic pattern is such that all the break portions are
Any configuration that does not overlap in one place is sufficient, and other configurations are not particularly limited.

The flowchart of FIG. 26 shows a motor excitation correction routine in the eleventh embodiment. The eleventh
Since the motor rotation execution routine in this embodiment is the same as that in FIG. 19 of the ninth embodiment, the description thereof is omitted. The motor excitation correction routine of the eleventh embodiment is basically the same as that of the ninth embodiment, but differs in that all correction values are calculated.

When it is determined that the execution of the motor rotation correction can be performed by the determination processing from step 331 to step 333 as in the ninth embodiment, the flow proceeds to step 343.
From each of the first to Nth unit speed time memories measured by detection signals from a plurality (two or more) of magnetic sensors,
An operation for subtracting the set standard value is executed, and the sum of the respective subtraction results is calculated.

In the next step 344, a value obtained by dividing the total value of the respective subtraction results by the total number of valid unit speed time memories, that is, the average value of the time to be corrected with respect to the set standard value is calculated. . Step 343 is the processing of the plurality of speed comparison units 314 and 318, and step 344 is the processing of the average value calculation unit 319.

Although the determination of the valid unit speed time memory is not particularly shown, the value of the unit speed time memory for storing the measurement cycle time of the detection signal moving in the discontinuous portion is as follows. 27, the set standard value is set in the unit speed time memory by the port interrupt processing shown in FIG. Accordingly, the unit speed time memory in which the result of the subtraction in step 343 becomes zero is regarded as invalid, and is not counted in the effective total number of valid unit speed time memories. Needless to say, adding zero has no effect on the sum.

Subsequently, the motor rotation speed correction unit 315
In step 345, the set standard value is added to the correction value calculated by the average value calculation unit 319 to calculate a correction value.
Here, when the value calculated in step 344 of the average value calculation unit 319 is plus, it is determined that the rotation is slow, and the value subtracted from the set standard value is the correction value. Conversely, when the value is minus,
The value added to the set standard value upon judging that the rotation is fast is the correction value. When ± 0, the set standard value is directly used as the correction value. Then, the process proceeds to step 340, where the correction value is stored in the excitation cycle time memory, and the process ends.

Finally, the event timer interrupt and the port interrupt shown in the flowchart of FIG. 27 will be described.
Since the eleventh embodiment does not have the break position determination unit as described above, the detection of each break portion of the received detection signal is performed by the unit for executing the current speed time measurement. It is configured so that the speed timer is also used.

In FIG. 27A, when an event timer interrupt occurs, various timer interrupt processes are executed in step 351, and in step 390, the unit speed timer for each of a plurality of detection signals received is incremented, and each speed time is incremented. After counting, the process of the event timer interrupt is terminated in step 356.

On the other hand, as shown in FIGS. 27B and 27C, a port interrupt which occurs independently for each detection signal is provided for each detection signal and executes the same processing. However, the unit speed timer memory and the unit speed time memory are independently provided for each detection signal, and the unit speed time memory is used for the calculation in the speed comparison units 314 and 318 as described above.

If a port interrupt occurs due to the first detection signal, in this embodiment having no detection signal selection unit, processing is performed to accept all detection signals.
That is, at step 396, it is checked whether or not the first unit speed timer value has reached a predetermined value or more, and when it has reached, at step 400, the set standard value is stored in the first unit speed time memory. Then, the port interrupt processing by the first detection signal ends. That is, the above step 396
When the first unit speed timer value is slightly longer than the cycle time for moving the minute unit distance, the determination is made in the same manner as the interruption detection timer described in the ninth embodiment. Judge that you entered the department. Therefore, the detection signal in this case is determined to be invalid, and as described in the motor excitation correction routine of FIG.
At 0, the set standard value is stored in the first unit speed time memory, and as a result, the detection signal at this time is invalidated.

On the other hand, if it is determined in step 396 that the first unit speed timer value has not reached the predetermined value or more, the value in step 397 is set as an effective unit speed time memory value.
To store the first unit speed timer value in the first unit speed time memory, clear the first unit speed timer value in step 398, and allow the next cycle time to be counted. The port interrupt processing based on the first detection signal ends.

The above is the port interrupt processing for the first detection signal. The other plurality of detection signals are different from the operation of the unit speed timer and the unit speed time memory, as shown in FIG. Are configured to execute a port interrupt process for a similar detection signal.

In the expressions shown in FIGS. 25 to 27, a plurality of items are referred to as first to N-th. However, this is a collective notation of processes to be executed independently. It is assumed that what is present is the Nth one.

As described above, in the eleventh embodiment, as in the ninth and tenth embodiments, a continuous and continuous detection signal can be obtained. In the eleventh embodiment, the current photosensitive drum 10
In the measurement of the speed 1, the unit speed values of the respective minute distances are obtained based on a large number of detection signals, and the average value of the unit speed values is calculated. Measurement becomes possible. As a result, the correction control of the motor rotation speed is also continued, and the correction is executed so that the rotation of the photosensitive drum 101 converges to the set speed.

As described above, according to the eleventh embodiment, the pulse motor 103 for driving the photosensitive drum 101
Regarding the rotation speed control, a continuous detection signal without interruption is constantly and stably obtained irrespective of the magnitude of the interval distance of the interruption portion of the magnetic pattern. Thus, the motor rotation speed correction processing for correcting the convergence of the motor excitation cycle time can be always executed.

(Other Embodiments) In each of the above-described embodiments of the present invention, the correction control of the rotational movement speed of the photosensitive drum in the electrophotographic apparatus is described as an example. It is intended to realize a motor rotation speed control that corrects the moving speed of the medium to a set moving speed value, and executes a moving control in which the moving speed of the moving medium in the apparatus or the like is constant and the speed is not uneven. Effective for things. Therefore, the present invention is not limited to the electrophotographic apparatus and the photosensitive drum, and is similarly limited to a sensor unit for detecting a minute unit distance amount of the moving medium, a minute moving distance detecting method, and the like. Not something.

That is, in each embodiment of the present invention, as a specific example for easily understanding the intention of the present invention, the configuration of a motor rotation speed correction unit relating to rotation control of a photosensitive drum in an electrophotographic apparatus will be described. However, the motor rotation speed correction unit of the present invention is not limited to the movement speed correction control of the photosensitive drum, and may be, for example, a case of controlling the movement speed of a photosensitive belt instead of the photosensitive drum, or a full color Needless to say, it can be used for controlling the moving speed of a transfer drum or a transfer belt for image formation.
Further, the present invention can be used for controlling the moving speed of a moving medium over a wide range, such as a moving speed control that requires accuracy in the moving speed of a moving medium in a recording apparatus as a whole, not only an electrophotographic apparatus, and a conveying speed control of an image recording material. .

In each embodiment of the present invention described above,
Although a magnetic pattern and a magnetic sensor are used in the sensor detecting section and the pattern section for detecting a minute distance of the moving medium, the moving speed information for the actual minute moving distance of the moving medium is fed back. An encoder using a sensor or the like may be used, and is not particularly limited. Although the motor unit in the present embodiment is described using an example using a pulse motor, the motor unit that controls the movement of the moving medium has the same motor type,
The corresponding motor rotation speed control is not particularly limited either, and the motor rotation speed control used is capable of correcting the minute rotation speed by feeding back the movement speed information with respect to the actual minute movement distance of the moving medium. What is necessary is just a suitable control configuration.

In each of the embodiments of the present invention described above,
For ease of understanding, the magnetic patterns are represented in black and white in the accompanying drawings. However, in actuality, there are magnetic patterns composed entirely of black and those that are colorless and transparent and can be directly printed on a medium. When printing on a colorless and transparent medium, for example, if a magnetic sensor is prepared in advance in a portion of the conveyance path that is pre-printed on printing paper as a recording material, oblique conveyance of the recording material, jam detection, Furthermore, the present invention can be applied to control of print paper conveyance behavior other than conveyance speed correction control such as positioning of a recording material.

The present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, and a printer).
The present invention may be applied to a device including two devices (for example, a copying machine, a facsimile device, and the like).

An object of the present invention is to provide a recording medium (storage medium) recording software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and to provide a computer for the system or apparatus. Needless to say, the present invention is also achieved when the CPU (or CPU or MPU) reads out and executes the program code stored in the recording medium.

In this case, the program code itself read from the recording medium realizes the function of the above-described embodiment, and the recording medium on which the program code is recorded constitutes the present invention.

As a recording medium for recording the program code and variable data such as a table, for example, a floppy disk (FD), hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, A nonvolatile memory card (IC memory card), a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instruction of the program code. It goes without saying that an operating system) may perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

[0362]

As described above, according to the first embodiment of the present invention, the rotation of the motor means (for example, a pulse motor) for driving a moving medium (for example, a photosensitive drum) is performed by detecting a minute distance. Even if it is started from an arbitrary position of the pattern for use, at least during the round of the moving medium, the first pattern break start determining means determines the predetermined period time amount of the detection pulse signal and captures the start timing of the pattern break, The first detection pulse signal generated thereafter is detected by the pattern break end determining means, and the start position of the pattern forming portion of the minute distance detection pattern is determined by this detection, and synchronization with the start position of the pattern forming portion is determined. After that, the start position of the pattern break is counted by counting the number of detection pulse signals generated from the top position of the pattern formation section. When the count value reaches a predetermined total number, the second pattern break start determining means for predicting and determining that the next pattern break is started, and the pattern forming section and the pattern forming section in cooperation with the pattern break end determining section. Since it is configured to execute the determination for distinguishing the discontinuity, the time delay of the start determination of the pattern discontinuity is prevented, and the pitch unevenness due to the erroneous correction of the motor means at the boundary point between the pattern formation part and the pattern discontinuity is prevented. Can be prevented beforehand, whereby the rotational speed of the moving medium is corrected convergence to a preset speed without being erroneously corrected, thereby reducing pitch unevenness in image formation.
Alternatively, an effect that can be prevented is exerted.

Further, according to the second embodiment of the present invention, in the rotation speed control of the motor means for controlling the movement of the moving medium of the recording apparatus, the moving set speed value which is a preset moving medium speed is used. The pulse cycle time detected by the sensor detecting means using the minute distance detection pattern having the actual speed of the moving medium on the surface of the moving medium is calculated and calculated with a predetermined minute distance amount of the minute distance detection pattern. The actual moving speed of the moving medium is constantly monitored for each minute distance, and when the actual moving speed is lower than a predetermined moving set speed value, the rotational speed of the motor means is accelerated by a predetermined amount, or On the contrary, when the speed is fast, the variable speed correction of the motor rotation speed such that the rotation speed of the motor means is reduced by a predetermined amount is executed for each minute distance, so that the actual moving speed of the moving medium is changed for each minute distance. And varying the adjustment, since the structure to converge correcting the preset moving set speed value, reducing the pitch unevenness image in the image formation, or an effect that can be removed.

Further, according to the third embodiment of the present invention, in the rotation speed control of the motor section for controlling the movement of the moving medium of the recording apparatus, the current speed of the moving medium is controlled by the minute distance having the current speed on the surface of the moving medium. By detecting the detection pattern and the sensor means for each predetermined minute distance that is a unit detection distance interval amount, and comparing and detecting the detection value with a line synchronization pulse set by an integer multiple N of the image synchronization signal, With respect to the preset speed value of the moving medium, the current moving speed of the moving medium is constantly monitored for each minute distance, and when it is determined that the moving speed value fed back is low, the rotational speed of the motor means is reduced. The motor rotational speed is variably adjusted and corrected under predetermined conditions such that the motor is accelerated by a predetermined amount, or conversely, if it is determined to be fast, the rotational speed of the motor is reduced by a predetermined amount. Since it is configured to be executed for each distance, the current moving speed of the moving medium is variably adjusted for each minute distance, converged and corrected to a predetermined moving set speed value, and the moving speed unevenness of the moving medium is adjusted. It is possible to execute the movement at the set speed without any problem, and to reduce or eliminate the pitch unevenness image in the image formation.

Further, according to the fourth embodiment of the present invention, the rotation speed control of the motor means for executing the movement of the moving medium is not performed by maintaining the set speed of the motor alone, but by moving on the surface of the moving medium. Speed is measured by a detection signal that measures the speed for each minute unit distance amount, and the current speed of the moving medium is recognized by comparing the measured speed result with a preset speed, and the target speed In executing the motor rotation speed correction for correcting the excitation cycle time of the rotation speed control of the motor means so that the value can maintain the set speed, the minute distance detection pattern portion for detecting the minute unit distance amount has a A plurality of minute distance detection pattern sections are prepared so that breaks may occur due to reasons such as control and control. Mounted in non configuration, a detection signal for measuring the current speed of the moving medium with multiple receiving, by switching with the relay detection signal portion to be valid,
Since the detection signal can be continued without being affected by the interruption due to the interruption, the rotation speed correction unit of the motor means can always be continued, and the moving speed of the moving medium is set in advance. There is an effect that convergence correction can be continuously performed at a constant speed and without speed unevenness. Further, according to the fourth embodiment of the present invention, in manufacturing the minute distance detecting pattern portion for detecting the minute unit distance amount, the degree of freedom for the distance amount of the discontinuous portion can be provided, so that the cost is significantly superior. The effect that it becomes becomes.

[Brief description of the drawings]

FIG. 1 is a functional block diagram illustrating a configuration of a motor rotation speed control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a processing procedure of a motor rotation execution processing unit according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating a processing procedure of a motor excitation correction processing unit according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a procedure of an event timer process according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure of a port interrupt processing in the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating a processing procedure of a motor rotation execution processing unit according to the second embodiment of the present invention.

FIG. 7 is a flowchart illustrating a procedure of an event timer process according to the second embodiment of the present invention.

FIG. 8 is a flowchart illustrating a procedure of a port interrupt process according to the second embodiment of this invention.

FIG. 9 is a functional block diagram illustrating a configuration of a motor rotation speed control device according to a third embodiment of the present invention.

FIG. 10 is a flowchart illustrating a processing procedure of a motor rotation execution portion of the motor rotation speed control device according to the third embodiment of the present invention.

FIG. 11 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the third embodiment of the present invention.

FIG. 12 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the fourth embodiment of the present invention.

FIG. 13 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the fifth embodiment of the present invention.

FIG. 14 is a functional block diagram illustrating a configuration of a motor rotation speed control device according to a sixth embodiment of the present invention.

FIG. 15 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the sixth embodiment of the present invention.

FIG. 16 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the seventh embodiment of the present invention.

FIG. 17 is a flowchart illustrating a processing procedure of a motor rotation correction portion of the motor rotation speed control device according to the eighth embodiment of the present invention.

FIG. 18 is a functional block diagram illustrating a configuration of a motor rotation speed control device according to a ninth embodiment of the present invention.

FIG. 19 is a flowchart illustrating a processing procedure of a motor rotation execution processing unit according to a ninth embodiment of the present invention.

FIG. 20 is a flowchart illustrating a processing procedure of a motor excitation correction processing unit according to a ninth embodiment of the present invention.

FIG. 21 is a flowchart illustrating a procedure of an event timer process according to a ninth embodiment of the present invention.

FIG. 22 is a flowchart illustrating a procedure of a port interrupt process according to the ninth embodiment of the present invention.

FIG. 23 is a flowchart illustrating a procedure of an event timer process according to the tenth embodiment of the present invention.

FIG. 24 is a flowchart illustrating port interrupt processing according to the tenth embodiment of the present invention.

FIG. 25 is a functional block diagram illustrating a configuration of a motor rotation speed control device according to a tenth embodiment of the present invention.

FIG. 26 is a flowchart illustrating a processing procedure of a motor excitation correction processing unit according to an eleventh embodiment of the present invention.

FIG. 27 is a flowchart showing a procedure of an event timer process and a port interrupt process in the eleventh embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 photosensitive drum 2 motor gear arrangement 3 pulse motor 4 magnetic pattern 5 magnetic sensor 6 scanning optical box 7 motor driver IC 10 CPU 101 photosensitive drum 102 motor gear arrangement 103 pulse motor 104 pulse motor driver IC 105 CPU 106 magnetic pattern 107 magnetic sensor 125 Scanning optical box unit 128 Laser unit 129 Polygon mirror 130 Image synchronization signal generation sensor unit 205 CPU 304, 306 Magnetic pattern 305, 307 Magnetic sensor 310 CPU

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 1/06 H02P 8/00 304A F-term (Reference) 2H027 DA17 DA38 DA41 DE04 DE07 ED02 EE03 EE04 EE06 ZA07 5C072 AA03 MB08 NA06 UA14 5H550 AA14 AA15 BB10 DD01 DD07 GG01 GG03 JJ03 JJ12 JJ17 JJ25 KK06 LL09 PP02 5H580 AA04 AA05 BB09 FA03 FA04 FA14 FA24 FC09 GG04 HH09

Claims (48)

[Claims] A minute distance set in advance on a medium surface along a moving direction of a moving medium built in a recording device driven by a motor means or on an auxiliary member corresponding to the medium surface. A minute distance detection pattern means that displays a distance pattern, and is disposed at an arbitrary vicinity of the minute distance detection pattern means, detects the distance pattern, and moves the moving medium by the minute distance. A sensor detection means for generating a detection pulse signal each time the operation is performed, and a pulse signal of the detection signal generated by the sensor detection means is compared with a predetermined time amount, or a synchronization signal provided in a recording device is provided. A small distance moving speed determining means for performing a periodic phase difference determination with a predetermined signal such as a predetermined signal; Motor rotation speed correction means for correcting a set rotation speed value, and correcting the rotation speed value of the motor means each time the moving medium moves the minute distance, thereby moving the moving medium. A motor rotation speed control device for correcting convergence of a speed to a set speed value, wherein the minute distance detection pattern means is a pattern forming unit capable of detecting the minute distance amount and cannot detect the minute distance amount. And a minute distance moving speed determining means for determining that the passage of the pattern break has started unless a detection pulse signal from the sensor detecting means is detected for a predetermined time or more. Pattern break start determining means, detection pulse counting means for counting the number of detection pulse signals from the sensor detection means, and counting of the detection pulse counting means. A second pattern break start determining means for determining that the passage of the pattern break portion is started when the value reaches a predetermined count value, and the pattern break is determined by the first or second pattern break start determining means; After determining the start of the section, when the detection pulse signal from the sensor detection means is re-detected, the pattern rotation end correction means to determine that the passage of the pattern break section has ended, and the motor rotation speed correction means , At least the second
When the start of the passage of the pattern break is determined by the pattern break start determining means, the correction of the rotation speed of the motor means is suspended until the pattern break end determining means determines the end of the passage of the pattern break. A motor rotation speed control device comprising a suspension means. 2. The method according to claim 1, wherein the predetermined count value of the detection pulse counting means is a constant determined by a set number of the minute distance amounts existing in the entire length of the pattern forming portion provided in advance. 2. The motor rotation speed control device according to 1. 3. A predetermined count value of the detection pulse counting means is stored in a total number storage means for storing a total number of the detection pulse signals with respect to a total length of the pattern forming portion counted by moving the moving medium in advance. The motor rotation speed control device according to claim 1, wherein the number of measurements is determined based on a value. 4. The recording device is an electrophotographic device,
The moving medium is driven by the motor unit that rotates at a predetermined speed and moves, and corresponds to a photosensitive drum or a photosensitive belt in an electrophotographic apparatus. The sensor detecting unit is a magnetic sensor, The S-pole and the N-pole arranged in the pattern forming portion of the minute distance detection pattern means are configured to read a change in the magnetic material arrangement and emit the detection pulse signal. 2. The motor rotation speed control device according to claim 1, wherein the amount of movement is a minute distance and is set in advance so as to correspond to an amount of movement of an integral multiple of the amount of image lines formed on the photosensitive drum. 5. The motor rotation speed correction unit controls a predetermined moving speed of a transfer medium for temporarily recording and holding an image formed on the moving medium, and conveys a recording material output by the recording apparatus. Such as a predetermined moving speed control of the transport means,
The motor rotation speed control device according to any one of claims 1 to 4, wherein the motor rotation speed control device is effective for controlling the rotation speed of various motor units included in the electrophotographic device serving as the recording device. 6. The motor power so that the moving speed of the moving medium, which is sequentially formed based on the image information and moves at a predetermined speed by the motor means, becomes the moving set speed value fixed and set in advance in the specification of the recording apparatus. A transfer coefficient of a transfer unit and a rotation speed of the motor unit are preset, and a next excitation instruction unit for recognizing a motor rotation excitation cycle time based on the movement set speed value of the moving medium and instructing the next excitation execution; ,
A motor excitation speed control device for performing a next excitation of the motor device by an output timing signal of the next excitation instruction device, the motor rotation speed control device comprising: a medium surface of the moving medium; A pattern is provided on the auxiliary member to divide the entire length of the moving medium in the moving direction along the moving direction at equal intervals and change the state for each distance amount, so that the minute moving distance amount can be detected. A minute distance detection pattern means in which the pattern is equally divided by an arbitrary constant value within a distance amount within a range of tens to hundreds of micrometers, and a state change for each pattern of the minute distance detection pattern means. A sensor detecting means for detecting; a cycle time measuring means for counting a required time of a detection pulse cycle for each pattern detected by the sensor detecting means with the movement of the moving medium; Detection pulse speed calculation means for calculating a pulse cycle speed obtained by the sensor detection means from a minute detection distance amount preset in the small distance detection pattern means and a cycle measurement time by the cycle time measurement means; Moving speed determination comparing means for comparing the pulse cycle speed value calculated by the detected pulse speed calculating means with the previously set moving set speed value of the moving medium for each pulse detected by the means; An exciting cycle time counting means for recognizing a motor rotation exciting cycle time based on the movement set speed value of the medium; and an exciting cycle time counting means based on a predetermined condition provided in advance according to a comparison result of the moving speed determination comparing means. Excitation cycle time correction means for correcting and correcting the count value to be set to: When the output timing signal of the next excitation instructing means is transmitted to the rotation excitation executing means, the rotation speed of the motor means is increased relative to the motor rotation excitation cycle time based on the set movement speed value. A motor rotation speed control device comprising: a motor rotation speed correction unit that accelerates or decelerates the time corrected by the cycle time correction unit. 7. The predetermined condition in the excitation cycle time correction means includes a predetermined fixed movement value set as a reference of the moving medium and the pulse calculated by the detected pulse speed calculation means. As a result of comparing and determining the periodic speed value with the moving speed determination comparing means, when it is determined that the pulse periodic speed value is slower, a value obtained by reducing the count value of the excitation cycle time counting means at a predetermined rate. In this case, the rotation speed of the motor means is accelerated and corrected by accelerating the motor rotation excitation cycle time, and conversely, when it is determined that the pulse cycle speed value is faster,
The count value of the excitation cycle time counting means is set at a value increased by a predetermined ratio, whereby the motor rotation excitation cycle time is delayed to reduce the rotation speed of the motor means. The motor rotation speed control device according to claim 6. 8. The predetermined condition in the excitation cycle time correction means includes the pulse cycle speed value calculated by the detection pulse speed calculation means and the movement set speed value of the moving medium fixed in advance. The moving speed determination is performed by using a difference calculating means for performing a difference calculation between the moving speed and the pulse cycle speed value calculated by the detected pulse speed calculating means, which is fixed in advance as a reference of the moving medium. As a result of the comparison by the comparing means, when it is determined that the pulse cycle speed value is slower, the count value of the excitation cycle time counting means is subtracted from the count value by the calculation result value of the difference calculating means. The rotation speed of the motor means is accelerated and corrected by accelerating the motor rotation excitation cycle time. Conversely, it is determined that the pulse cycle speed value is faster. If set, the count value in the excitation cycle time counting means is set to a value obtained by adding the count value to the result of the calculation in the difference calculation means, thereby delaying the motor rotation excitation cycle time and setting the 7. The motor rotation speed control device according to claim 6, wherein the rotation speed of the motor means is corrected by deceleration. 9. The predetermined predetermined condition in the excitation cycle time correction means includes the pulse cycle speed value calculated by the detected pulse speed calculation means and the movement set speed value of the moving medium fixed in advance. The moving speed determination is performed by using a difference calculating means for performing a difference calculation between the moving speed and the pulse cycle speed value calculated by the detected pulse speed calculating means, which is fixed in advance as a reference of the moving medium. As a result of the comparison by the comparing means, when it is determined that the pulse cycle speed value is slower, the count value of the excitation cycle time counting means is calculated from the count value by the difference calculation means by a predetermined value. Set by a value subtracted by the ratio value, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time,
Conversely, if it is determined that the pulse cycle speed value is earlier, the count value of the excitation cycle time counting means is added to the count value by a value obtained by making the calculation result value of the difference calculation means a predetermined ratio from the count value. 7. The motor rotation speed control device according to claim 6, wherein the motor rotation speed control device sets the rotation speed of the motor unit by decelerating the rotation speed of the motor means by delaying the motor rotation excitation cycle time. 10. The recording apparatus is an electrophotographic apparatus for sequentially forming images based on image information, and the moving medium moves at a predetermined speed in the electrophotographic apparatus to form an image on a photosensitive drum or a photosensitive belt. Wherein the motor means is a motor means for driving the photosensitive drum or the photosensitive belt, the motor power transmission means is a gear arrangement, and the sensor detecting means is magnetic. A state change of a magnetic pattern for detecting a minute distance composed of an S pole and an N pole formed on a surface of a sensor corresponding to the photosensitive drum or the photosensitive belt or on an auxiliary member corresponding to the surface. It is characterized in that reading and detecting the amount of rotational movement corresponding to the photosensitive drum or the photosensitive belt in units of minute distance amounts. Motor speed control device according to claim 6,. 11. A rotation speed correcting means of the motor means controls a predetermined moving speed of a transfer medium for temporarily recording and holding an image formed on the moving medium, and controls a conveyance of a recording material outputted by the recording apparatus. 12. The method according to claim 6, which is effective for controlling the rotational speed of various motor means included in the electrophotographic apparatus serving as the recording apparatus, such as controlling a predetermined moving speed of a transporting means. Motor rotation speed control device. 12. A recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein the moving speed of the moving medium on which an image is formed is fixed and set in advance according to the specifications of the recording apparatus. The transmission coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to become the set speed value, and the motor rotation excitation based on the movement set speed value of the moving medium is performed as a rotation speed control system of the motor means. A motor rotation speed control device comprising: a next excitation instructing unit for recognizing a cycle time and instructing the next excitation to be executed; and a rotation excitation executing unit for executing the next excitation of the motor unit by an output timing signal from the next excitation instructing unit. In the medium surface along the moving direction of the moving medium, or
On the auxiliary member surface corresponding to the medium surface, a minute distance amount obtained by multiplying the distance of one dot of the image row with respect to the moving direction of the moving medium by one integer is used to detect the minute movement distance amount of the medium surface. A pattern is sequentially formed with the unit detection distance interval amounts, and the unit detection distance interval amount is equal to or larger than the remaining distance amount that cannot be equally divided by the unit detection distance interval amount with respect to the entire length of the moving medium in the moving direction. A minute distance detection pattern unit in which a pattern break is set by a distance interval amount; a sensor detection unit that reads a state change of a pattern of the minute distance detection pattern unit that moves with movement of the moving medium; Means for detecting a periodic phase of a detection pulse detected by the means, and an image writing timer generated for each dot of an image sequence along a moving direction of the moving medium when forming an image. The phase synchronization state is determined by comparing the image synchronization signal for instructing the synchronization with the cycle phase of the line synchronization pulse generated by the line synchronization pulse generation means which is an integral multiple of the one dot distance amount set by the unit detection distance interval amount. Moving medium speed determination means, excitation cycle time counting means for counting a preset standard excitation time count value for recognizing the rotation excitation cycle time of the motor, An excitation cycle time correction unit that corrects and corrects the standard excitation time count value under predetermined conditions, and corrects the count timing of the excitation cycle time count unit to change the phase of the output timing signal issued from the next excitation instruction unit. Variably correcting the rotation speed of the motor means executed by the rotation excitation execution means by the excitation cycle time correction means. A motor rotation speed control device, comprising: a motor rotation speed correction unit that performs acceleration / deceleration control for an interval. 13. The moving medium speed judging means, wherein each time the sensor detecting means detects, the first counting means counts a detection pulse time, and the count value of the first counting means is set in advance. A break time determining means for determining that the detection pulse break determination time value has been exceeded. A pattern break position judging means for judging that the moving medium is moving at a break in the pattern configuration by the pattern break position judging means. As one of the predetermined conditions, the standard excitation time count value is set in the excitation cycle time counting means, and the motor 13. The motor rotation speed control device according to claim 12, wherein the rotation speed correction unit temporarily suspends execution of the rotation speed correction control of the motor unit. 14. The moving medium speed judging means includes: a second counting means for counting the number of image synchronization signals generated within a detection pulse period of the sensor detecting means; and a count value of the second counting means. Signal input number determining means for determining that the number of image synchronization signals generated within a certain detection pulse period exceeds a preset image synchronization signal input number, and wherein the signal input number determining means exceeds a predetermined count value. And a pattern break position determining means for determining that the movement of the moving medium in the current state has entered a break portion of the pattern configuration, wherein the pattern break position determining device moves the break portion of the pattern configuration. When it is determined that the medium is moving, the excitation cycle time correction means sets the excitation cycle time count as one of predetermined conditions. 13. The motor rotation speed control device according to claim 12, wherein the standard excitation time count value is set in a unit, and the motor rotation speed correction unit temporarily suspends execution of the rotation speed correction control of the motor unit. . 15. In the state where the pattern break position determining means determines that the moving medium is not moving a break in the pattern configuration, one of the predetermined conditions executed by the excitation cycle time correction means is as follows. With respect to the synchronization phase of the detection pulse detected by the sensor detection unit, the moving medium speed determination unit compares and determines the periodic phase of the line synchronization pulse in the line synchronization pulse generation unit based on the image synchronization signal, When the moving medium speed determining means determines that the cycle phase of the detection pulse is later than the cycle phase of the line synchronization pulse, the excitation cycle time correction means adds the standard excitation time count value to the excitation cycle time counting means. A calculated value subtracted by a predetermined ratio is set, thereby shortening the motor rotation excitation cycle time, and When the moving medium speed determining means determines that the periodic phase of the detection pulse is earlier than the periodic phase of the line synchronization pulse, the exciting cycle time correcting means corrects the exciting cycle time. Setting a calculated value obtained by adding the standard excitation time count value to the counting means at a predetermined ratio, thereby delaying the motor rotation excitation cycle time and decelerating and correcting the rotation speed of the motor means. Thus, the rotation speed of the motor means is changed by the excitation cycle time correction means for each detection pulse detected by the sensor detection means with respect to the motor rotation excitation cycle time based on the preset standard excitation time count value. 15. The motor rotation speed control device according to claim 13, wherein the motor rotation speed is accelerated or decelerated by the time corrected. 16. A method according to claim 1, wherein said pattern break position determining means determines that said moving medium is not moving at a break in the pattern configuration, wherein said excitation cycle time correcting means executes one of said predetermined conditions. The moving medium speed determination unit compares and determines the periodic phase of the line synchronization pulse in the line synchronization pulse generation unit based on the image synchronization signal with respect to the period phase of the detection pulse detected by the sensor detection unit, The time required for the detection pulse and the line synchronization pulse is measured, and the difference time is calculated and calculated by the difference time calculation means.When the moving medium speed determination means determines that the detection pulse is later than the line synchronization pulse, The excitation cycle time correction means causes the excitation cycle time count means to calculate the difference time from the standard excitation time count value. A count value obtained by subtracting the difference calculation time value calculated in the step is set, thereby shortening the motor rotation excitation cycle time,
When the rotational speed of the motor means is accelerated and corrected, and conversely, when the moving medium speed determining means determines that the detection pulse is earlier than the line synchronization pulse, the exciting cycle time correcting means sets the exciting cycle time counting means. Is set to a count value obtained by adding the difference calculation time value calculated by the difference time calculation means from the standard excitation time count value, thereby delaying the motor rotation excitation cycle time and reducing the rotation speed of the motor means. This means that deceleration correction is performed, whereby the rotation speed of the motor means is changed by the detection pulse detected by the sensor detection means with respect to the motor rotation excitation cycle time based on the preset standard excitation time count value. 15. The motor according to claim 13, wherein the motor is accelerated or decelerated by a time corrected by the excitation cycle time correcting means. Rotation speed control device. 17. In the state where the pattern break position determining means determines that the moving medium is not moving a break in the pattern configuration, one of the predetermined conditions executed by the excitation cycle time correcting means is as follows. The moving medium speed determination unit compares and determines the periodic phase of the line synchronization pulse in the line synchronization pulse generation unit based on the image synchronization signal with respect to the period phase of the detection pulse detected by the sensor detection unit, The time required for the detection pulse and the line synchronization pulse is measured, and the difference time is calculated and calculated by the difference time calculation means.When the moving medium speed determination means determines that the detection pulse is later than the line synchronization pulse, The excitation cycle time correction means causes the excitation cycle time count means to calculate the difference time from the standard excitation time count value. A count value obtained by subtracting a value corresponding to a predetermined ratio of the difference operation time value calculated in the step is set, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time, and conversely, When the moving medium speed determining unit determines that the detection pulse is earlier than the line synchronization pulse, the exciting cycle time correcting unit sends the exciting cycle time counting unit the standard exciting time count value using the difference time calculating unit. A count value obtained by adding a value corresponding to a predetermined ratio of the calculated difference calculation time value is set, thereby delaying the motor rotation excitation cycle time and decelerating and correcting the rotation speed of the motor means. By the above, the rotation speed of the motor means, the sensor rotation excitation cycle time based on the preset standard excitation time count value, the sensor rotation Motor speed control device according to claim 13 or 14 out means time period to be corrected by the excitation period time correction means for each detection pulse for detecting, characterized in that to acceleration or deceleration. 18. The recording apparatus is an electrophotographic apparatus for sequentially forming images based on image information, and the moving medium moves at a predetermined speed in the electrophotographic apparatus to form an image on a photosensitive drum or a photosensitive belt. Wherein the motor means is a motor means for driving the photosensitive drum or the photosensitive belt, the motor power transmission means is a gear arrangement, and the sensor detecting means is magnetic. A state change of a magnetic pattern for detecting a minute distance composed of an S pole and an N pole formed on a surface of a sensor corresponding to the photosensitive drum or the photosensitive belt or on an auxiliary member corresponding to the surface. It is for reading and detecting the amount of rotational movement corresponding to the photosensitive drum or the photosensitive belt in units of unit detection distance intervals. Motor speed control device according to claim 12, wherein the door. 19. The motor rotation speed correction unit controls a predetermined movement speed of a transfer medium for temporarily recording and holding an image formed on the moving medium, and conveys a recording material output by the recording apparatus. 18. The motor rotation speed according to claim 12, which is effective for controlling the rotation speed of various motor units included in the electrophotographic apparatus serving as the recording device, such as controlling a predetermined moving speed of a conveyance unit. Control device. 20. On a medium surface along a moving direction of a moving medium driven and moved by a motor means rotating at a predetermined speed set in the specification of the recording apparatus, or on an auxiliary member corresponding to the medium surface A pattern forming section capable of detecting a minute unit distance amount of the moving medium surface; and a minute distance detecting pattern means including a break portion that cannot detect a minute unit distance amount of the moving medium surface; A sensor detecting unit that is disposed at an arbitrary position near the detecting pattern unit and converts a state change state of the pattern forming unit and the state of the discontinuous portion for each minute unit distance amount into an electric signal; and an electric signal generated from the sensor detecting unit. A break position determining means for determining the break portion of the minute distance detecting pattern means when detecting an interval of a predetermined time or more based on a period time amount of the signal; A minute distance speed judging unit for judging a unit speed for each minute unit distance amount by detecting an interval within the predetermined time based on a period time amount of an electric signal emitted from the unit detecting unit; and a unit speed for each minute distance amount. Speed comparing means for comparing and judging a value of the moving medium surface with a preset value of the moving medium surface; and when the excitation is performed in a preset motor excitation cycle time, the minute unit in the speed comparing means is used. A motor rotation speed control device that has a motor rotation speed correction unit that corrects the motor excitation cycle time based on a speed comparison result for each distance amount; On the auxiliary member, at least two or more sets of the minute distance detecting pattern means and the sensor detecting means are provided. The attachment positional relationship is constituted by a positional relationship in which the positions of the discontinuities included in each of the minute distance detecting pattern means do not overlap each other along the moving direction of the moving medium, and from any one of the sensor detecting means. The motor rotation speed correction unit includes a detection signal selection unit that selects an electric signal to be emitted. A motor rotation speed control device, wherein the motor excitation cycle time is corrected. 21. The detection signal selection means has optional selection means for selecting any one electrical signal from the plurality of sensor detection means when the motor means is started, and the interruption position determination means comprises: The position of the break is determined based on the electric signal selected by the arbitrary selecting means, and when the start position of the break is determined, the electric signal of another sensor detecting means of the plurality of sensor detecting means is immediately determined. The detection signal switching means, and the switching of the detection signal switching means enables the speed comparison means to perform a speed comparison of unit speeds for each of the minute unit distance amounts, whereby the motor rotation speed correction means 21. The motor excitation cycle time is corrected based on the speed comparison result from the speed comparison unit that is continued. Motor rotation speed control device. 22. A plurality of the minute distance detecting pattern means having a plurality of the minute distance detecting pattern means, each of which has a positional relationship in which the position of each of the discontinuous parts is relatively positioned at a predetermined angle set in advance. When the motor means is activated, the motor means has optional selecting means for selecting any one electric signal from the plurality of sensor detecting means, and the break position determining means is based on the electric signal selected by the optional selecting means. Determining the position of the break, and immediately determining the start position of the break, first detection signal switching means for immediately switching to an electric signal of a sensor detection means located in the next order based on the predetermined angle; A time value calculated based on the entire length of the break formed by each minute distance detecting pattern means is counted with respect to the entire length of the moving medium in the moving direction. When the counter unit and the first detection signal switching unit perform switching to the sensor detection unit positioned in the next order, the subsequent switching execution is determined at the predetermined angle according to the passage of time of the counter unit. Second detection signal switching means for switching to the electric signal of the next sensor detection means in order, and the speed comparison means is continued by the first and second detection signal switching means. By being able to perform the speed comparison of the unit speed for each minute unit distance amount, the motor rotation speed correction unit corrects the motor excitation cycle time based on the speed comparison result from the speed comparison unit that is continued. 21. The motor rotation speed control device according to claim 20, wherein: 23. On the medium surface of the moving medium, or
A plurality of minute distance speed determination means and a plurality of sets of the minute distance speed determination means and the break position determination which can correspond one-to-one with a plurality of sets of the minute distance detection pattern means and the sensor detection means provided on an auxiliary member corresponding to the medium surface; Means and the speed comparing means, wherein the motor exciting means averages each correction time of the motor exciting cycle time calculated from the comparison result from the plurality of the speed comparing means. 23. The method according to claim 20, wherein the motor rotation speed correction unit performs correction by using a result of the average value calculation unit as a correction time value of the motor excitation cycle time. Motor rotation speed control device. 24. The recording apparatus is an electrophotographic apparatus for sequentially forming images based on image information, and the moving medium moves at a predetermined speed in the electrophotographic apparatus to form an image on a photosensitive drum or a photosensitive belt. Wherein the motor means is a motor means for driving an element corresponding to the photosensitive drum or the photosensitive belt; the sensor detecting means is a magnetic sensor; and the minute distance detecting pattern means is: A magnetic pattern for detecting a minute distance comprising an S pole and an N pole, wherein the magnetic sensor reads a state change of the magnetic pattern as the magnetic pattern moves, and corresponds to the photosensitive drum or the photosensitive belt. The motor rotation speed correction means detects the rotation speed as a rotation amount, and based on the detected minute rotation amount, determines the rotation speed of the motor means. 21. The motor rotation speed control device according to claim 20, wherein the degree control is corrected. 25. The motor rotation speed correction unit controls a predetermined moving speed of a transfer medium for temporarily recording and holding an image formed on the moving medium, and conveys a recording material output by the recording apparatus. 25. The motor rotation speed according to claim 20, which is effective for controlling the rotation speed of various motor units included in the electrophotographic apparatus serving as the recording device, such as controlling a predetermined movement speed of a conveyance unit. Control device. 26. A predetermined minute distance unit on a medium surface along a moving direction of a moving medium built in a recording apparatus driven by a motor means or on an auxiliary member corresponding to the medium surface. A minute distance detection pattern means that displays a distance pattern as a distance pattern, and the distance means is disposed at an arbitrary vicinity of the minute distance detection pattern means, detects the distance pattern, and moves the moving medium by the minute distance amount. A motor rotation speed control method for a motor rotation speed control device having a sensor detection means for generating a detection pulse signal each time the operation is performed, wherein a pulse period amount of the detection pulse signal generated by the sensor detection means is compared with a predetermined time amount. Or a minute distance moving speed determining step of performing a periodic phase difference determination between the pulse period amount and a predetermined signal such as a synchronization signal included in the recording device. A motor rotation speed correction step of correcting a preset rotation speed value of the motor means based on a result of the determination in the minute distance moving speed determination step, wherein the minute distance detection pattern means comprises: The minute distance moving speed determination step comprises the step of determining whether the detection pulse signal from the sensor detecting means has a predetermined time. A first pattern break start determining step for determining that the passage of the pattern break has begun if not detected, a detection pulse counting step of counting the number of detection pulse signals from the sensor detection means; When the count value in the step reaches a predetermined count value, the passage start of the pattern break portion and After determining the start of the pattern break in the second pattern break start determining step and the first or second pattern break start determining step, the detection pulse signal from the sensor detecting unit is determined. A pattern break end determining step of determining that the passage of the pattern break portion has ended when re-detected, wherein the motor rotation speed correction step includes at least the second pattern break start determining step of the pattern break portion. When judging the start of passage, the method further comprises a correction interruption step of interrupting the rotation speed correction of the motor means until the end of the passage of the pattern interruption part is determined in the pattern interruption end determination step; Each time the distance is moved, the rotation speed value of the motor means is corrected, and Motor rotation speed control method characterized by converging correcting the moving speed of the body set speed value. 27. The method according to claim 27, wherein the predetermined count value in the detection pulse counting step is a constant determined by a set number of the minute distance amounts existing in the entire length of the pattern forming unit. Item 28. The motor rotation speed control method according to Item 26. 28. A predetermined count value in the detection pulse counting step is stored in total number storage means for storing a total number of the detection pulse signals with respect to a total length of the pattern forming portion counted by moving the moving medium in advance. 3. The number of measurements determined by a value to be obtained.
7. The motor rotation speed control method according to 6. 29. A motor power so that an image is sequentially formed based on image information and a moving speed of a moving medium moving at a predetermined speed by a motor means becomes a moving set speed value fixed and set in advance in the specification of the recording apparatus. A transfer coefficient of a transfer unit and a rotation speed of the motor unit are preset, and a next excitation instruction unit for recognizing a motor rotation excitation cycle time based on the movement set speed value of the moving medium and instructing the next excitation execution; Rotation excitation execution means for executing the next excitation of the motor means with an output timing signal of the next excitation instruction means,
In addition, on the medium surface of the moving medium or on an auxiliary member corresponding to the medium surface, the entire length of the moving medium in the moving direction is divided at regular intervals along the moving direction, and the state changes for each distance amount. Pattern means for detecting a minute distance, wherein the pattern is equally divided by an arbitrary constant value of distance amounts within a range of several tens to several hundreds of micrometers so that the minute movement distance can be detected. A motor rotation speed control method for a motor rotation speed control device, comprising: a sensor detection unit for detecting a state change of each pattern of the minute distance detection pattern unit; and the sensor detection unit accompanying movement of the moving medium. A period time measuring step of counting a required time of a detection pulse period for each pattern detected by the method; and a minute detection distance amount preset in the minute distance detection pattern unit. A detection pulse speed calculation step for calculating a pulse cycle speed obtained by the sensor detection means from a cycle measurement time by the cycle time measurement means; and a detection pulse speed calculation step for each pulse detected by the sensor detection means. A moving speed determination comparing step of comparing the pulse cycle speed value with the previously set moving set speed value of the moving medium; and recognizing a motor rotation excitation cycle time based on the moving set speed value of the moving medium. An exciting cycle time counting step for performing, and an exciting cycle time correcting step of correcting and correcting a count value set in the exciting cycle time counting step according to a predetermined condition provided in advance according to the comparison result in the moving speed determination comparing step. The output of the next excitation instructing means with the content corrected in the excitation cycle time correction step The time at which the rotation speed of the motor means is corrected in the excitation cycle time correction step with respect to the motor rotation excitation cycle time based on the movement set speed value by transmitting the imming signal to the rotation excitation execution means. A motor rotation speed correction step of accelerating or decelerating the minute. 30. The predetermined condition in the excitation cycle time correction step, wherein the predetermined fixed movement value as a reference of the moving medium and the pulse calculated in the detection pulse speed calculation step As a result of comparing and determining the periodic speed value with the moving speed determination comparing step, when it is determined that the pulse periodic speed value is slower, a value obtained by reducing the count value in the excitation cycle time counting step by a predetermined ratio. In this manner, the motor rotation excitation cycle time is accelerated to accelerate and correct the rotation speed of the motor means. Conversely, if it is determined that the pulse cycle speed value is faster, the excitation cycle time count step is performed. Is set to a value increased by a predetermined ratio, thereby delaying the motor rotation excitation cycle time to reduce the rotation speed of the motor means. 30. The motor rotation speed control method according to claim 29, wherein the motor speed is reduced. 31. The predetermined condition provided in the excitation cycle time correction step includes the pulse cycle speed value calculated in the detection pulse speed calculation step and the movement setting speed value fixed in advance of the moving medium. The moving speed determination is performed by using a difference calculating step of performing a difference calculation between the moving medium and the pulse periodic speed value calculated in the detected pulse speed calculating step, the moving set speed value fixed as a reference of the moving medium. As a result of the comparison determination in the comparison step, when it is determined that the pulse cycle speed value is slower, the count value in the excitation cycle time count step is subtracted from the count value by the calculation result value in the difference calculation step. The rotation speed of the motor is accelerated and corrected by accelerating the motor rotation excitation cycle time. If it is determined that the pulse cycle speed value is earlier, the count value in the excitation cycle time counting step is set to a value obtained by adding the count value to the calculation result value in the difference calculation step from the count value. 3. The method according to claim 2, wherein the rotational excitation cycle time is delayed to correct the rotational speed of the motor means.
10. The motor rotation speed control method according to claim 9. 32. The predetermined condition provided in the excitation cycle time correction step includes the pulse cycle speed value calculated in the detection pulse speed calculation step and the movement set speed value fixed in advance of the moving medium. The moving speed determination is performed by using a difference calculating step of performing a difference calculation between the moving medium and the pulse periodic speed value calculated in the detected pulse speed calculating step, the moving set speed value fixed as a reference of the moving medium. As a result of the comparison determination in the comparison step, when it is determined that the pulse cycle speed value is slower, the count value in the excitation cycle time count step is calculated from the count value in the difference calculation step by a predetermined value. It is set with a value subtracted by the value obtained by the ratio, whereby the motor rotation excitation cycle time is advanced to reduce the rotation speed of the motor means. Acceleration correction is performed, and conversely, if it is determined that the pulse cycle speed value is earlier, the count value in the excitation cycle time counting step is calculated from the count value in the difference calculation step to a predetermined ratio. 30. The motor rotation speed control according to claim 29, wherein the motor rotation speed control is performed by decelerating and correcting the rotation speed of the motor means by delaying the motor rotation excitation cycle time. Method. 33. A recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein a moving speed of the moving medium on which an image is formed is fixed and set in advance according to the specifications of the recording apparatus. The transmission coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to become the set speed value, and the motor rotation excitation based on the movement set speed value of the moving medium is performed as a rotation speed control system of the motor means. A second excitation instructing means for recognizing a cycle time and instructing the next excitation to be executed, and a rotation excitation executing means for executing the next excitation of the motor means by an output timing signal from the next excitation instructing means; On the medium surface along the moving direction of the medium, or on the auxiliary member surface corresponding to the medium surface, in order to detect the minute moving distance of the medium surface, in the moving direction of the moving medium, A pattern is sequentially formed of unit detection distance intervals each having a minute distance amount obtained by multiplying the one dot distance amount of the corresponding image row by an integer as one unit, and the unit detection distance interval amount with respect to the entire length of the moving medium in the moving direction. Pattern means for detecting a minute distance in which a pattern break portion is set with a distance interval amount equal to or greater than the unit detection distance interval amount for a surplus distance amount that cannot be equally divided; and the minute distance detection moving with movement of the moving medium A motor rotation speed control method for a motor rotation speed control device, comprising: a sensor detection unit that reads a change in the state of a pattern of a use pattern unit, wherein a period of a detection pulse detected by the sensor detection unit and an image are formed. At this time, an image synchronizing signal indicating an image writing timing generated for each dot of an image sequence along the moving direction of the moving medium is transmitted to the unit detection distance. A moving medium speed judging step of comparing a periodic phase of a line synchronizing pulse generated by a line synchronizing pulse generating means which is an integral multiple of the one dot distance amount set by the separation distance to judge the degree of phase synchronization; An excitation cycle time counting step of counting a preset standard excitation time count value for recognizing the excitation cycle time; and a standard excitation time count under predetermined conditions preset from the result of the moving medium speed determination step. An excitation cycle time correction step for correcting and correcting the value, and by correcting the count timing in the excitation cycle time count step, the phase of an output timing signal generated from the next excitation instruction means is varied, and the rotation excitation execution means The rotation speed of the motor means executed by the acceleration / deceleration control is corrected by the time corrected in the excitation cycle time correction step. Motor rotation speed control method characterized by the motor speed correction step for. 34. The moving medium speed judging step includes a first counting step of counting a detection pulse time every time the sensor detecting means detects, and a count value in the first counting step is set in advance. And a break time determining step for determining that the detected pulse break time has exceeded a predetermined count value in the break time determining step. And a pattern break position determining step of determining that the moving medium is moving.If the moving medium determines that the moving medium is moving in the pattern break position in the pattern break position determining step, the excitation cycle time correction step is set in advance. As one of the predetermined conditions, at the time of the standard excitation in the excitation cycle time counting step, 4. The method according to claim 3, wherein an interval count value is set, and in the motor rotation speed correction step, execution of the rotation speed correction control of the motor is temporarily stopped.
4. The motor rotation speed control method according to 3. 35. The moving medium speed determining step includes: a second counting step of counting the number of the image synchronization signals generated within a detection pulse period of the sensor detecting means; and a count value in the second counting step. A signal input number judging step of judging that the number of the image synchronizing signals generated within the detection pulse period exceeds a preset image synchronizing signal input number, and a predetermined count value in the signal input number judging step. Determining that the movement of the moving medium has entered the interrupted portion of the pattern configuration when determining that the current position has exceeded the interrupted portion, and determining the interrupted portion of the pattern configuration in the pattern interrupted position determining step. When it is determined that the moving medium is moving, the excitation cycle time correction step is performed under a predetermined condition set in advance. As One, claim 3, wherein the set the standard excitation time count value by the excitation cycle time counting step, and said motor rotational speed correction step, characterized in that suspend the execution of the rotational speed correction control of said motor means
4. The motor rotation speed control method according to 3. 36. One of the predetermined conditions to be executed in the excitation cycle time correction step in a state where it is determined in the pattern interruption position determination step that the moving medium is not moving a discontinuous portion of the pattern configuration. For the synchronous phase of the detection pulse detected by the sensor detection means, the cycle phase of the line synchronization pulse in the line synchronization pulse generation means based on the image synchronization signal is compared and determined in the moving medium speed determination step, When it is determined in the moving medium speed determination step that the cycle phase of the detection pulse is later than the cycle phase of the line synchronization pulse, in the excitation cycle time correction step, the standard excitation time count value is calculated in the excitation cycle time count step. A calculated value subtracted by a predetermined ratio is set, and thereby, the motor rotation excitation cycle is set. If the period of the detection pulse is determined to be faster than the period of the line synchronization pulse in the moving medium speed determination step, the excitation period is determined. In the time correction step, a calculated value obtained by adding the standard excitation time count value at a predetermined ratio to the excitation cycle time count step is set,
This means that the motor rotation excitation cycle time is delayed to reduce and correct the rotation speed of the motor means, whereby the rotation speed of the motor means is based on the preset standard excitation time count value. 4. The motor rotation excitation cycle time is accelerated / decelerated by the time corrected in the excitation cycle time correction step for each detection pulse detected by the sensor detection means.
36. The motor rotation speed control method according to 4 or 35. 37. One of the preset predetermined conditions to be executed in the excitation cycle time correction step in a state where it is determined in the pattern interruption position determination step that the moving medium is not moving an interrupted portion of the pattern configuration. The moving medium speed determination step compares and determines the cycle phase of the line synchronization pulse in the line synchronization pulse generation means based on the image synchronization signal with respect to the cycle phase of the detection pulse detected by the sensor detection means, The required time of the detection pulse and the line synchronization pulse is measured, the difference time is calculated and calculated in a difference time calculation step, and when it is determined that the detection pulse is later than the line synchronization pulse in the moving medium speed determination step, The excitation cycle time correction means supplies the excitation cycle time count means with the standard excitation time count value. A count value obtained by subtracting the difference calculation time value calculated in the difference time calculation step from the above, thereby accelerating the rotation speed of the motor means by accelerating the motor rotation excitation cycle time, and conversely, When the moving medium speed determination means determines that the detection pulse is earlier than the line synchronization pulse, the excitation time correction step calculates the excitation cycle time counting step from the standard excitation time count value in the excitation time correction step. Setting a count value obtained by adding the calculated difference operation time value, thereby delaying the motor rotation excitation cycle time and decelerating and correcting the rotation speed of the motor means. The speed is the motor rotation excitation cycle time based on the preset standard excitation time count value, Claim capacitors detecting means time period to be corrected by the excitation period time correction step for each detection pulse for detecting, characterized in that it is accelerated and decelerated 3
36. The motor rotation speed control method according to 4 or 35. 38. One of the preset predetermined conditions to be executed in the excitation cycle time correction step in a state where it is determined in the pattern interruption position determination step that the moving medium is not moving an interrupted portion of the pattern configuration. The moving medium speed determination step compares and determines the cycle phase of the line synchronization pulse in the line synchronization pulse generation means based on the image synchronization signal with respect to the cycle phase of the detection pulse detected by the sensor detection means, The required time of the detection pulse and the line synchronization pulse is measured, the difference time is calculated and calculated in a difference time calculation step, and when it is determined that the detection pulse is later than the line synchronization pulse in the moving medium speed determination step, The excitation cycle time correction means counts the standard excitation time in the excitation cycle time counting step. A count value obtained by subtracting a value corresponding to a predetermined ratio of the difference calculation time value calculated by the difference time calculation means from the value is set, thereby shortening the motor rotation excitation cycle time and accelerating the rotation speed of the motor means. Conversely, when it is determined in the moving medium speed determination step that the detection pulse is earlier than the line synchronization pulse, the excitation cycle time correction step includes the excitation cycle time count step from the standard excitation time count value. A count value obtained by adding a value corresponding to a predetermined ratio of the difference calculation time value calculated in the difference time calculation step is set, thereby delaying the motor rotation excitation cycle time and decelerating the rotation speed of the motor means. In this way, the rotation speed of the motor means is controlled based on the preset standard excitation time count value. 36. The motor rotation speed according to claim 34 or 35, wherein the rotation speed is accelerated or decelerated by a time corrected in the excitation cycle time correction step for each detection pulse detected by the sensor detection means with respect to the rotation excitation cycle time. Control method. 39. On a medium surface along the moving direction of a moving medium driven and moved by a motor means rotating at a predetermined speed set in the specification of the recording apparatus, or on an auxiliary member corresponding to the medium surface A pattern forming unit capable of detecting a minute unit distance amount of the moving medium surface; a minute distance detecting pattern unit including a break portion that cannot detect a minute unit distance amount of the moving medium surface; A motor rotation speed control device comprising: a pattern detection unit disposed at an arbitrary position near a detection pattern unit and a sensor detection unit that converts a state change state of the interruption unit into an electric signal for each minute unit distance amount; In the control method, based on a periodic time amount of an electric signal emitted from the sensor detecting means, when an interval of a predetermined time or more is detected, the minute distance detecting pattern means A break position determining step of determining a break, and a minute distance speed for determining a unit speed for each minute unit distance amount by detecting an interval within the predetermined time based on a period time amount of an electric signal emitted from the sensor detecting means. A determining step; a speed comparing step of comparing and determining a value of the unit speed for each of the minute distance amounts with a preset value of the set speed of the moving medium surface; and executing excitation at a preset motor excitation cycle time. The motor speed correction step means for correcting the motor excitation cycle time based on the speed comparison result for each minute unit distance amount in the speed comparison step, on the medium surface of the moving medium, or Having at least two or more sets of the minute distance detection pattern means and the sensor detection means on an auxiliary member corresponding to the medium surface; The attachment positional relationship of the minute distance detection pattern means is configured such that the positions of the discontinuities of the minute distance detection pattern means do not overlap each other along the moving direction of the moving medium, A detection signal selection step of selecting an electric signal emitted from any one of the sensor detection means, wherein the motor rotation speed correction step is based on the electric signal selected in the detection signal selection step, and in the speed comparison step. A motor rotation speed control method, wherein the motor excitation cycle time is corrected based on the compared speed comparison results. 40. The detecting signal selecting step includes an optional selecting step of selecting any one electrical signal from the plurality of the sensor detecting means when the motor means is started, wherein the break position determining step includes: The position of the break is determined based on the electric signal selected in the arbitrarily selecting step, and the start position of the break is determined. A detection signal switching step of switching, wherein the switching in the detection signal switching step allows the speed comparison step to perform a speed comparison of the unit speed for each of the minute unit distance amounts, so that the motor rotation speed correction is performed. In the step, the motor excitation cycle time is calculated based on the speed comparison result in the speed comparison step that is continued. Motor rotation speed control method according to claim 39, characterized in that positive to. 41. The minute distance detection pattern means having a plurality of the minute distance detection pattern means are configured such that the positions of the breaks are relatively positioned at a predetermined angle set in advance, and the detection signal selecting step includes: When the motor means is started, the motor means has an optional step of selecting any one electrical signal from the plurality of sensor detecting means, and the break position determining step is based on the electrical signal selected in the optional step. A first detection signal switching step of switching to an electric signal of a sensor detection unit located in the next order based on the predetermined angle as soon as the position of the break is determined and the start position of the break is determined; The total length of the moving medium in the moving direction is calculated based on the total length of the discontinuity formed by each minute distance detection pattern unit. A counter step of counting a time value, in the first detection signal switching step,
When the switching is performed on the sensor detecting means positioned in the next order, the subsequent switching is performed on the electric signal of the next sensor detecting means in the order determined at the predetermined angle according to the elapse of the counter step. A second detection signal switching step for switching, wherein the first and second detection signal switching steps allow the speed comparison step to perform a continuous speed comparison of unit speeds for each of the minute unit distance amounts. 40. The motor rotation speed control method according to claim 39, wherein the motor rotation speed correction step corrects the motor excitation cycle time based on a speed comparison result from the continued speed comparison step. 42. On the medium surface of the moving medium, or
A plurality of minute distance speed determination steps and a break position determination that can correspond one-to-one with a plurality of sets of the minute distance detection pattern means and sensor detection means provided on an auxiliary member corresponding to the medium surface; And a speed comparison step, wherein the motor excitation step is an average value calculation step of averaging each correction time of the motor excitation cycle time calculated from comparison results from the plurality of the speed comparison means. 42. The motor rotation speed correction step according to claim 39, wherein the motor rotation speed correction step performs a correction using a result of the average value calculation step as a correction time value of the motor excitation cycle time. Motor rotation speed control method. 43. The recording apparatus is an electrophotographic apparatus that sequentially forms images based on image information, and the moving medium moves at a predetermined speed in the electrophotographic apparatus to form an image on a photosensitive drum or a photosensitive belt. Wherein the motor means is a motor means for driving an element corresponding to the photosensitive drum or the photosensitive belt; the sensor detecting means is a magnetic sensor; and the minute distance detecting pattern means is: A magnetic pattern for detecting a minute distance comprising an S pole and an N pole, wherein the magnetic sensor reads a state change of the magnetic pattern as the magnetic pattern moves, and corresponds to the photosensitive drum or the photosensitive belt. The rotation amount of the motor means is detected in the motor rotation speed correction step based on the detected minute rotation movement amount. 43. The motor rotation speed control method according to claim 1, wherein the rotation speed control is corrected. 44. The motor rotation speed correction step,
The recording device, such as a predetermined moving speed control of a transfer medium for temporarily recording and holding an image formed on the moving medium, and a predetermined moving speed control of a conveying unit for conveying a recording material output by the recording device; 43. The motor rotation speed control method according to claim 1, which is effective for controlling the rotation speed of various motor means included in the electrophotographic apparatus. 45. A predetermined minute distance unit on a medium surface in a moving direction of a moving medium built in a recording apparatus driven by a motor means or on an auxiliary member corresponding to the medium surface. A minute distance detection pattern means that displays a distance pattern as a distance pattern, and the distance means is disposed at an arbitrary vicinity of the minute distance detection pattern means, detects the distance pattern, and moves the moving medium by the minute distance amount. And a sensor forming means for generating a detection pulse signal each time the pattern is formed.The patterning means for detecting a minute distance comprises a pattern forming portion capable of detecting the minute distance and a pattern forming section capable of detecting the minute distance. A recording medium storing a program for controlling a motor rotation speed control device constituted by a discontinuous portion by a computer, the program is stored in a computer. The pulse period amount of the detection pulse signal generated by the sensor detection means is compared with a predetermined time amount, or the pulse phase amount is determined by a period phase difference from a predetermined signal such as a synchronization signal of the recording apparatus. And correcting a preset rotation speed value of the motor means based on the determination result. At this time, if the detection pulse signal from the sensor detection means is not detected for a predetermined time or more, the pattern interruption portion Of 1
It is judged and recognized that the passage has started for the second time, and at the same time, the number of detection pulse signals from the sensor detection means is counted,
When the count value reaches a predetermined count value, it is determined that the second and subsequent passes of the pattern break are to be started. When it is detected, it is determined that the passage of the pattern discontinuity has been completed. Interrupting the rotation speed correction, thereby correcting the rotation speed value of the motor means each time the moving medium moves by the minute distance amount, and converging and correcting the moving speed of the moving medium to a set speed value. A recording medium on which a characteristic motor rotation speed control program is recorded. 46. A motor drive system wherein an image is sequentially formed on the basis of image information, and a motor power is set so that a moving speed of a moving medium moving at a predetermined speed by a motor means becomes a moving set speed value fixed and set in advance in the specification of the recording apparatus. A transfer coefficient of a transfer unit and a rotation speed of the motor unit are preset, and a next excitation instruction unit for recognizing a motor rotation excitation cycle time based on the movement set speed value of the moving medium and instructing the next excitation execution; Rotation excitation execution means for executing the next excitation of the motor means with an output timing signal of the next excitation instruction means,
In addition, on the medium surface of the moving medium or on an auxiliary member corresponding to the medium surface, the entire length of the moving medium in the moving direction is divided at regular intervals along the moving direction, and the state changes for each distance amount. Pattern means for detecting a minute distance, wherein the pattern is equally divided by an arbitrary constant value of distance amounts within a range of several tens to several hundreds of micrometers so that the minute movement distance can be detected. And a program for controlling a motor rotation speed control device having a sensor detecting means for detecting a state change for each pattern of the minute distance detecting pattern means by a computer. The time required for the detection pulse period for each pattern detected by the sensor detecting means in accordance with the movement of the moving medium; The pulse period speed obtained by the sensor detection unit is calculated from the minute detection distance amount and the period measurement time set in advance for the use pattern unit, and the pulse period speed calculated for each pulse detected by the sensor detection unit The value is compared with the predetermined moving set speed value of the moving medium, and the motor rotation excitation cycle time based on the moving set speed value of the moving medium is counted. By correcting and correcting the count value set in the excitation cycle time count according to a predetermined condition, and transmitting the output timing signal of the next excitation instruction means to the rotation excitation execution means with the corrected content,
A motor rotation speed control program is characterized in that the rotation speed of the motor means is accelerated or decelerated by the time corrected for the motor rotation excitation cycle time based on the set movement speed value. Recording medium. 47. A recording apparatus for sequentially forming images based on image information on a moving medium moving at a predetermined speed, wherein a moving speed of the moving medium on which an image is formed is fixed and set in advance according to the specifications of the recording apparatus. The transmission coefficient of the motor power transmission means and the rotation speed of the motor means are set so as to become the set speed value, and the motor rotation excitation based on the movement set speed value of the moving medium is performed as a rotation speed control system of the motor means. A second excitation instructing means for recognizing a cycle time and instructing the next excitation to be executed, and a rotation excitation executing means for executing the next excitation of the motor means by an output timing signal from the next excitation instructing means; On the medium surface along the moving direction of the medium, or on the auxiliary member surface corresponding to the medium surface, in order to detect the minute moving distance of the medium surface, in the moving direction of the moving medium, A pattern is sequentially formed of unit detection distance intervals each having a minute distance amount obtained by multiplying the one dot distance amount of the corresponding image row by an integer as one unit, and the unit detection distance interval amount with respect to the entire length of the moving medium in the moving direction. Pattern means for detecting a minute distance in which a pattern break portion is set with a distance interval amount equal to or greater than the unit detection distance interval amount for a surplus distance amount that cannot be equally divided; and the minute distance detection moving with movement of the moving medium A computer-readable recording medium storing a program for controlling a motor rotation speed control device having a sensor detecting means for reading a change in the state of the pattern of the use pattern means, wherein the program is detected by the sensor detecting means. A period of a detection pulse, and one dot of an image sequence along a moving direction of the moving medium when forming an image. The image synchronization signal indicating the image writing timing generated every time is compared with the cycle phase of the line synchronization pulse generated by the line synchronization pulse generating means which is an integral multiple of the one dot distance set by the unit detection distance interval. A phase synchronization state is determined, a preset standard excitation time count value for recognizing a rotation excitation cycle time of the motor is counted, and under a predetermined condition preset from the determination result, the standard excitation time count value is calculated. By correcting the count timing of the excitation cycle time count, the phase of the output timing signal generated from the next excitation instruction means is varied, and the rotation speed of the motor means executed by the rotation excitation execution means is corrected. For the time to be corrected,
A recording medium on which a motor rotation speed control program is recorded, the program being subjected to acceleration / deceleration control. 48. On a medium surface along a moving direction of a moving medium driven and moved by a motor means rotating at a predetermined speed set in the specification of the recording apparatus, or on an auxiliary member corresponding to the medium surface A pattern forming unit capable of detecting a minute unit distance amount of the moving medium surface; a minute distance detecting pattern unit including a break portion that cannot detect a minute unit distance amount of the moving medium surface; Sensor detection means for converting the state change state of the pattern forming portion and the discontinuity portion into an electric signal, which is arranged at an arbitrary position near the detection pattern means and for each minute unit distance amount,
On the medium surface of the moving medium, or on an auxiliary member corresponding to the medium surface, at least two or more sets of the minute distance detection pattern means and the sensor detection means are provided, and The mounting positional relationship of the distance detecting pattern means is constituted by a positional relationship in which the positions of the discontinuities of the respective minute distance detecting pattern means do not overlap each other along the moving direction of the moving medium. A recording medium storing a program for controlling a motor rotation speed control device having a detection signal selecting step of selecting an electric signal emitted from one of the sensor detection means by a computer, wherein the program is issued to the computer from the sensor detection means; When an interval longer than a predetermined time is detected based on the amount of periodic time of the electric signal, the minute distance detection pulse is detected. Based on the periodic time amount of the electric signal emitted from the sensor detecting means, and detecting the unit speed for each minute unit distance amount by detecting an interval within the predetermined time; The unit speed value for each distance amount is compared with a predetermined value of the set speed of the moving medium surface, and when the excitation is performed at a motor excitation cycle time set in advance, when the excitation is performed for each minute unit distance amount, Motor rotation speed control, wherein the motor excitation cycle time is corrected based on a speed comparison result, and wherein the motor excitation cycle time is corrected based on the speed comparison result based on the selected electric signal. A recording medium on which a program is recorded.