JP2000006478A - Paper feed control method and recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance line feed accuracy by measuring the relation between the sheet feed amount of a paper feed roller and the rotational amount of a paper feed motor for individual paper feed rollers and acquiring a rotational quantity correction value of the paper feed motor required for line feed through the paper feed roller based on the measurements. SOLUTION: At the time of acquiring a correction value concerning to a paper feed roller 2 secured with a roller drive gear 5, the roller 2 is fixed to a measuring table at first and brought into contact with a press roller. The roller 2 is rotated by driving a paper feed motor 8 under that state and stopped at a position where a reference positional marker 3 is detected by an origin detecting means thus locating the roller 2 at the origin of rotational angle. Subsequently, the roller 2 is rotated continuously by driving the motor 8 again and the number of steps of the motor 8 is measured along with the rotational angle of a sensor roller thus attaining a correction value with reference to the origin of rotational angle of the roller 2. After the roller 2 is set in a recorder, rotational amount of the motor 8 is corrected based on the correction value at the time of line fed operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed control method and a recording apparatus capable of maintaining high paper feed accuracy by a paper feed roller.

[0002]

2. Description of the Related Art In general, there has been proposed a recording apparatus called a printer capable of recording characters and images on paper by driving a recording head such as a thermal head and an ink jet head.

In such a conventional recording apparatus, a sheet is supported in front of a platen, and a recording head is driven based on recording information to perform recording on the sheet in line units. By repeating a line feed operation in which the recording medium is moved by a predetermined amount in a direction perpendicular to the moving direction of the recording head with the paper feed roller, characters and images are recorded at desired positions on the paper. ing.

In recent printing apparatuses, higher-quality images are required to be recorded, and in order to record such high-quality images, the accuracy of the amount of line feed is required to be improved. Therefore, improve the processing accuracy of the paper feed roller, such as its outer diameter, runout, and roundness, and reduce manufacturing variations to improve the product quality of the paper feed roller itself, or to devise control of paper feed. Has been done.

[0005]

However, when the accuracy of the line feed amount in the above-mentioned conventional recording apparatus is required to be improved by improving the product quality of the paper feed roller itself, processing of the paper feed roller is required. One with high accuracy,
For example, a tolerance of a runout accuracy of 5 μm or less is required, and a paper feed roller having such a high processing accuracy has a low yield, requires much labor and time for manufacturing, and has an economic burden. There was a problem of being large.

If the accuracy of the line feed amount in the recording apparatus is determined by controlling the paper feed, the recording apparatus calculates the amount of line feed required for the line feed and calculates the line feed amount of the paper feed roller. The amount of rotation of the paper feed motor that rotationally drives the paper feed roller is determined based on the outer peripheral length and the like, and paper feed control that suppresses variations in the line feed amount by rotating the paper feed motor by the amount of rotation is required. Japanese Patent Application Laid-Open No. Hei 8-20 discloses a method for suppressing such a variation in line feed amount.
No. 32 is known. In this publication, a paper feed detection roller having an outer peripheral length substantially equal to the length of one line of a print head is brought into contact with a part of the paper conveyed by the paper feed roller. The paper feed amount is detected by detecting the detected portion that is disposed and rotating coaxially with the detection roller by the detection device, and the line feed amount is accurately determined by controlling the paper feed amount by the paper feed motor. Have to be able to.

However, in such a recording apparatus, the recording apparatus itself includes a paper feed detection roller, a highly accurate and complicated detection apparatus for detecting the rotation amount of the paper feed detection roller, and a detection result of the detection apparatus. A control unit for detecting the paper feed amount from the rotation amount of the paper feed detection roller based on the control and controlling the paper feed amount by the paper feed motor. There is a problem that it becomes a hindrance factor of the conversion.

Further, in such a recording apparatus,
The line feed amount is detected by the detection roller each time recording is performed on paper, so that it takes time for the line feed operation.In particular, in a recent high-resolution recording device with a small line feed amount, a long time is required for the line feed operation. However, there is a problem that the recording speed is reduced.

Further, in recent years, various types of paper such as plain paper, postcards, OHP paper, iron sheet paper, sticker paper, and special paper with improved surface smoothness have been used as recording paper. Since the variation in the contact pressure between the paper feed roller and the paper and the type of paper used for recording also cause variations in the amount of line feed, the control unit requires a long calculation processing time, requires a large-capacity memory, There has been a problem that the software has to be replaced with software, which requires a great deal of labor and time, resulting in a large economic burden.

The present invention has been made in view of the above points, and a paper feed control method and a paper feed control method capable of maintaining high accuracy of a line feed amount of a paper regardless of the processing accuracy of a paper feed roller. It is an object of the present invention to provide an inexpensive recording apparatus that can suitably use the recording apparatus.

[0011]

According to a first aspect of the present invention, there is provided a paper feed control method according to the present invention. When a paper feed roller having a portion to be detected as a measurement point is formed, a relationship between a paper feed amount of the paper feed roller and a rotation amount of the paper feed motor with respect to an origin of a rotation angle of the paper feed roller is used as a reference. Measurement, and based on the measurement result, obtains a correction value for correcting the rotation amount of the paper feed motor necessary for line feed of the paper by the paper feed roller, and sends the paper feed roller used for this measurement to a recording device. At the same time, the correction value is stored in the recording device, and the amount of rotation of the paper feed motor during a line feed operation of the recording device is controlled based on the correction value. By adopting such a configuration, the paper feed roller measures the relationship between the paper feed amount of the paper feed roller and the rotation amount of the paper feed motor for each manufactured paper feed roller. Based on the result, a correction value for correcting the rotation amount of the paper feed motor required for the line feed of the paper by the paper feed roller is obtained. The amount of rotation of the paper feed motor during the line feed operation of the recording apparatus is controlled using a correction value unique to the paper feed roller incorporated in the recording apparatus. Therefore, regardless of the processing accuracy of the paper feed roller, the accuracy of the line feed amount of the paper can be kept high in units of μm.

A feature of the paper feed control method according to the present invention described in claim 2 is that the paper feed control method comprises the step of rotating a paper feed motor and providing a detected portion serving as a measurement point of the origin of the rotation angle. When a feed roller is formed, the relationship between the paper feed amount of the paper feed roller and the rotation amount of the paper feed motor is measured for each type of paper with reference to the origin of the rotation angle of the paper feed roller. A correction value for correcting the amount of rotation of the paper feed motor required for line feed of the paper by the paper feed roller based on the paper feed roller is acquired, and the paper feed roller used for this measurement is incorporated in a recording apparatus. At the same time, the recording device stores the correction value for each type of paper, and controls the rotation amount of the paper feed motor during a line feed operation of the recording device for each type of paper based on the correction value. is there. Here, for each type of paper, for example,
Plain paper, postcards, OHP paper, iron sheet paper, sticker paper, special paper with improved surface smoothness, etc. In other words, general single-color or full-color recording mode for recording on plain paper, postcard Postcard recording mode for recording in single or full color on OHP paper, OHP sheet recording mode for recording in single or full color on OHP paper, recording mode for recording in single or full color on iron sheet, sticker for single or full color recording on sticker paper Recording mode refers to a wide variety of recording modes, such as high-quality recording mode that prints high-quality monochromatic or full-color images that are close to photo-quality on specialty paper.This recording mode is selected according to the design concept and other needs. You. By adopting such a configuration, the paper feed roller is configured such that, for each manufactured paper feed roller, the relationship between the paper feed amount of the paper feed roller and the rotation amount of the paper feed motor is different for each type of paper. Based on the measurement result, a correction value for correcting the rotation amount of the paper feed motor required for the line feed of the paper by the paper feed roller based on the measurement result is obtained for each type of paper. Further, the rotation amount of the paper feed motor during the line feed operation of the recording apparatus is controlled for each type of paper using a correction value unique to the paper feed roller incorporated in the recording apparatus. Therefore, regardless of the processing accuracy of the paper feed roller, the accuracy of the line feed amount of the paper can be maintained at a high level in μm for each type of paper, that is, for each of various recording modes.

[0013] A feature of the recording apparatus according to the present invention is that a paper feed roller that is driven to rotate by a paper feed motor corresponds to the paper feed roller on a one-to-one basis. A line feed amount storage unit in which a correction value for correcting a rotation amount of a paper feed motor necessary for line feed of a sheet by a paper feed roller is stored in advance, and a detected unit serving as a measurement point of an origin of a rotation angle of the paper feed roller. Origin detecting means for detecting the detected portion, a roller angle position determining portion for determining the angular position of the paper feed roller based on a detection signal that the origin detecting means has detected the detected portion, at the time of a line feed operation A line feed operation time motor control unit that controls the rotation amount of the paper feed motor based on the angle position of the paper feed roller determined by the roller angle position determination unit and the correction value stored in the line feed amount storage unit; In that it has a certain. By adopting such a configuration, the origin detecting means reliably detects the origin of the angular position of the paper feed roller by detecting the detected portion formed on the paper feed roller. Then, the roller angle position determination unit reliably determines the angle position of the paper feed roller during the line feed operation. Further, the line feed operation motor control unit determines the amount of rotation of the paper feed motor during the line feed operation of the recording apparatus by the angle position of the paper feed roller determined by the roller angle position determination unit and the correction value stored in the line feed amount storage unit. Control based on the Therefore, regardless of the processing accuracy of the paper feed roller, the accuracy of the line feed amount of the paper can be kept high in units of μm. Further, since the line feed amount of the paper is controlled based on the angular position of the paper feed roller and the correction value stored in the line feed amount storage unit, the recording apparatus itself has a high precision for detecting the rotation amount of the paper feed roller. A complicated detection device and a control unit that detects the paper feed amount from the rotation amount of the paper feed detection roller based on the detection result of the detection device and controls the paper feed amount by the paper feed motor are not required, As a result, it is possible to reduce the number of parts, to reduce the cost, and to reduce the weight. Furthermore, the configuration in which the line feed amount of the paper is controlled based on the angular position of the paper feed roller and the correction value stored in the line feed amount storage unit has a short processing time in the motor control unit during line feed operation, and has a small capacity. With a small amount of memory and small software, software development can be done in a short time with little effort, it can be inexpensive, and line feed operation can be done in a short time. The recording speed can be improved even with a high-resolution recording device having a small resolution.

Further, the recording apparatus of the present invention described in claim 4 is characterized in that a paper feed roller that is driven to rotate by a paper feed motor corresponds to the paper feed roller on a one-to-one basis. A line feed amount storage unit that stores in advance a correction value for correcting the rotation amount of the paper feed motor necessary for line feed of the sheet for each sheet type by the paper feed roller, and a measurement point of the origin of the rotation angle of the paper feed roller. A detected portion, an origin detecting means for detecting the detected portion, and a roller angular position determining portion for determining an angular position of the paper feed roller based on a detection signal obtained by detecting the detected portion by the origin detecting portion. And a paper selection switch for selecting a paper type, and a correction value to be used during a line feed operation is selected from the correction values for each paper type stored in the line feed amount storage unit according to the setting of the paper selection switch. correction A selection control unit, and a correction value stored in the line feed amount storage unit selected by the correction value selection control unit and the angle position of the paper feed roller determined by the roller angle position determination unit during a line feed operation. And a motor control unit for line feed operation that controls the rotation amount of the paper feed motor based on a correction value according to the setting of the paper selection switch. By adopting such a configuration, the origin detecting means reliably detects the origin of the angular position of the paper feed roller by detecting the detected portion formed on the paper feed roller. Then, the roller angle position determination unit reliably determines the angle position of the paper feed roller during the line feed operation. The paper selection switch selects the type of paper used for recording, for example, plain paper, postcards, OHP paper, iron sheet paper, sticker paper, special paper with improved surface smoothness, etc. General single-color or full-color recording mode for recording on paper, postcard recording mode for single-color or full-color recording on postcards, OHP sheet recording mode for single-color or full-color recording on OHP paper, single-color or full-color recording on iron sheets Recording mode to perform recording in single or full color on sticker paper, and high-quality recording mode to perform high-quality single-color or full-color recording similar to photographic quality on specialty paper. The recording mode to be used can be selected and set. further,
The correction value selection control unit selects a correction value to be used at the time of a line feed operation from the correction values for each sheet type stored in the line feed amount storage unit according to the setting of the sheet selection switch. Further, at the time of a line feed operation, the motor control unit sets the line feed amount of the sheet for each sheet type based on the angle position of the paper feed roller determined by the roller angle position determination unit and the correction value stored in the line feed amount storage unit. Ensure control. Therefore, regardless of the processing accuracy of the paper feed roller,
Units can be kept high. The line feed amount of the paper is controlled for each type of paper, that is, for each recording mode based on the angular position of the paper feed roller and the correction value selected by the correction value selection control unit. A high-precision and complicated detection device for detecting the amount of rotation of the roller, and the amount of paper being fed by the paper feed motor based on the amount of rotation of the paper feed detection roller based on the detection result of the detection device. Therefore, a control unit for controlling the number of components is not required. As a result, the number of parts can be reduced, the cost can be reduced, and the weight can be reduced. Still further, the configuration in which the line feed amount of the sheet is controlled for each sheet type based on the angular position of the paper feed roller and the correction value selected by the correction value selection control unit is a processing time in the line feed operation motor control unit. Short, small-capacity memory and small software, software development can be done in a short time with little effort, it can be inexpensive, and line feed operation can be done in a short time Therefore, the recording speed can be improved even in the case of a recent high-resolution recording apparatus having a small line feed amount and having various recording modes.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view showing a main part of a first embodiment of a recording apparatus according to the present invention to which a paper feed control method according to the present invention is applied, and FIG. 2 is a block diagram showing a configuration of the main part.

The printing apparatus of the present embodiment is formed so as to be able to perform a general printing mode, for example, a single-color printing on plain paper.

As shown in FIG. 1, the recording apparatus 1 of the present embodiment has a paper feed roller 2 for transporting a sheet P to a recording position (not shown). This paper feed roller 2 is
A detected portion which is rotatably provided on a printer frame (not shown) and which is provided on at least one end surface of the paper feed roller 2 as a measurement point of the origin of the rotation angle of the paper feed roller 2 during recording. The reference position marker 3 is provided so as to be able to rotate integrally with the paper feed roller 2. This reference position marker 3
In the present embodiment, is formed of a reflective seal, a reflective plate, paint, or the like that can reflect light, and is provided at a position that does not interfere with the traveling path of the paper P. The reference position marker 3 is detected by origin detection means 4 such as a reflection type optical sensor provided at a position near the paper feed roller 2 which does not interfere with the travel path of the paper P.
Is detected each time the paper feed roller 2 makes one rotation. Also, the origin detection means 4
Control means 1 for controlling the operation of each section of the recording apparatus 1
0, and a detection signal of the reference position marker 3 detected by the origin detection means 4 is sent to the control means 10. Note that the reference position marker 3
May be formed by a projection or the like, and the origin detecting means 4 may be of a contact type.

A roller drive gear 5 coaxially attached to the paper feed roller 2 is fixed to at least one end of the rotation shaft 2a of the paper feed roller 2. A motor gear 7 fixed to an output shaft 8a of a paper feed motor 8 composed of a stepping motor is connected to the roller drive gear 5 via one or a plurality of transmission gears 6. A pressure roller (not shown) is rotatably provided on the outer peripheral surface of the paper feed roller 2. The pressure roller is driven by the paper feed roller 2 with a predetermined contact force so as to be driven to rotate, and the rotation axis of the pressure roller and the rotation axis of the paper feed roller 2 are arranged substantially in parallel. Have been.

The paper feed motor 8 is driven to rotate the paper feed roller 2 via the motor gear 7, the transmission gear 6, and the roller drive gear 5, respectively. The paper P inserted in between is pinched and transported. Further, the paper feed resolution by driving the paper feed motor 8 in this embodiment is formed to be about 5 μm. The paper feed motor 8 is electrically connected to the control means 10 and is driven to rotate based on a control command sent from the control means 10.

The reference position marker 3 may be provided on a portion that rotates coaxially with the paper feed roller 2, for example, a roller drive gear 5.

As shown in FIG. 2, the control means 10 comprises:
The control unit 10 includes at least a CPU 11, a memory 12 formed of a ROM, a RAM, or the like having an appropriate capacity.
Also, a recording head 20 such as a thermal head and an ink jet head, and various switches (not shown) related to various operations such as a power switch and paper supply are electrically connected. The paper feed motor 8 and the recording head 20 are connected via a drive circuit (not shown) called a controller for driving each of them.

The memory 12 has at least a line feed amount storage unit 15, a roller angle position determination unit 16, a line feed operation time motor control unit 17, and a storage unit 19.

The line feed amount storage unit 15 stores a correction value for correcting the rotation amount of the paper feed motor 8 necessary for line feed of the paper P by the paper feed roller 2 corresponding to the paper feed roller 2 on a one-to-one basis. Have been. A method of obtaining the correction value stored in the line feed amount storage unit 15 will be described later.

The roller angular position judging section 16 stores a program for judging the angular position of the paper feed roller 2 based on a detection signal obtained by the origin detecting means 4 detecting the reference position marker 3 as a detected part. I have.

At the time of a line feed operation, the motor control unit 17 based on the angle position of the paper feed roller 2 determined by the roller angle position judgment unit 16 and the correction value stored in the line feed amount storage unit 15 at the time of a line feed operation. A program for controlling the rotation amount of the paper feed motor 8 necessary for line feed is stored.

The storage unit 19 stores various programs such as a program for controlling the driving of the recording head 20 based on the recording information during the recording operation, a program relating to the abnormality detection operation and the supply of the paper P, and data used for recording. A variety of programs and data for controlling the operation are stored.

Here, a method of obtaining the correction value stored in the line feed amount storage unit 15 will be described.

FIG. 3 shows an example of the configuration of a correction value acquisition system for acquiring a correction value to be stored in a line feed amount storage unit of an embodiment of a recording apparatus according to the present invention to which the paper feed control method according to the present invention is applied. FIG.

As shown in FIG. 3, in the correction value acquisition system 30 of the present embodiment for acquiring the correction value stored in the line feed amount storage unit 15 of the recording apparatus 1 of the present embodiment, the paper feed roller 2 is attached and detached. It has a measuring table 31 which is rotatable and supports the paper feed roller 2. The measuring table 31 includes roller driving means 32 for driving the paper feed roller 2,
And an origin detecting means 4 for detecting the origin of the rotation angle of the paper feed roller 2, a paper movement amount detecting means 33 for detecting the amount of movement of the paper P by the paper feed roller 2, and the like.

The roller driving means 32 includes the same paper feed motor 8, motor gear 7, transmission gear 6, roller driving gear 5, and the like as those used in the recording apparatus 1 of this embodiment. The roller drive gear 5 is used by being fixed to the paper feed roller 2.

The drive motor 8 and the origin detecting means 4 are electrically connected to a computer 34. The paper feed motor 8 is controlled based on a control command sent from the computer, and is detected by the origin detecting means 4. The detected signal is sent to a computer, and the origin (home position) of the rotation angle of the paper feed roller 2 is detected based on the detected signal.

The sheet moving amount detecting means 33 is for detecting the moving amount of the sheet P conveyed by the sheet feed roller 2. In the present embodiment, the sheet moving through the sheet P at the time of sheet feeding is performed. A sensor roller 36 having a plurality of slits coaxially rotating with the sensor roller 36 for detecting the amount of rotation of the sensor roller 36;
An optical sensor (photo interrupter) 38 for detecting the slit 7 is provided. That is, the sensor rotor 37 and the optical sensor 38 are encoders that replace the analog amount of the rotation angle of the sensor roller 36 with a digital amount. The optical sensor 38 is electrically connected to the computer 34, and can transmit a detection signal of a rotation angle when the sensor roller 36 rotates to the computer 34. The sensor roller 36 of the present embodiment is formed such that the outer peripheral length of the sensor roller 36 is about １ ／ of the outer peripheral length of the paper feed roller 2 and the outer peripheral length of the sensor roller 36 It is formed so as to be substantially equal to the moving amount of P (line feed amount).

The paper movement amount detecting means 33 includes:
The movement amount of the paper P may be directly measured.

The computer 34 includes a display device 40 composed of a CRT or the like for displaying at least various kinds of data such as measurement results, and an external input device such as a keyboard or a mouse for inputting a control command to the correction value acquisition system 1. 41 and a storage device 42 for storing various programs and data such as programs and data for controlling the entire correction value acquisition system 30 and for storing new data.
Etc. are connected.

Then, in order to obtain the correction value stored in the line feed amount storage unit 15 of the recording apparatus 1 of the present embodiment, first, the paper is fed by a specified size, for example, 10.03 mm. The sensor roller 36 when the paper feed (line feed) of the specified step of the paper feed motor 8 is performed by an appropriate jig using a reference roller for which the correction step for the specified step of the paper feed motor 8 is known. 1
The number of steps of the paper feed motor 8 exceeding the rotation is obtained on average and used as a calibration value of the sensor roller 36.

Next, the paper feed roller 2 to which the roller drive gear 5 is fixed is mounted on the measuring table 31. Thereafter, the paper P, for example, plain paper is brought into contact with a predetermined position of the paper feed roller 2, and then the pressing roller is moved The sheet is brought into contact with the paper feed roller 2 via P to complete preparation for paper feed.

Then, by operating the external input means 41 to drive the paper feed motor 8 of the roller drive means 32, the paper feed roller 2 is rotated several times to remove the stress when the paper P is set. Then, the rotation of the paper feed roller 2 is stopped at the position where the origin detecting means 4 detects the reference position marker 3 of the paper feed roller 2, so that the paper feed roller 2 is positioned at the origin (home position) of the rotation angle.

Then, the external input means 41 is operated to drive the paper feed motor 8 of the roller drive means 32 to rotate the paper feed roller one or more times continuously. At this time, the number of steps of the paper feed motor 8 and the sensor roller The rotation angle of 36 is measured at each position where the paper feed roller 2 is divided into 64.

The measurement result is obtained by a correction value calculation program stored in the computer 34, in which the sensor roller 36 is obtained by adding the calibration value to one rotation of the sensor roller 36.
The number of actual steps, which is the amount of rotation of the paper feed motor 8 required for the rotation of the paper P, is calculated, and the difference between the actual number of steps and the reference number of steps of the paper feed motor 8 required for line feed of the paper P is averaged. Thus, a correction value based on the origin of the rotation angle of the paper feed roller 2 is obtained. This correction value is rounded to an integer value after rounding off the decimal point, and is adjusted so that the sum when the paper feed roller 2 makes one rotation becomes equal.
The top and bottom of the value with respect to the integer value are preferentially added and subtracted one by one based on the average of the sum of the values, so that the rotation amount of the paper feed motor 8 required for the line feed of the paper P by the paper feed roller 2 is reduced. Obtain a correction value to be corrected.

Then, the paper feed roller 2 used for the measurement is incorporated in the recording apparatus 1 and a correction value for correcting the rotation amount of the paper feed motor 8 necessary for line feed of the paper P unique to the paper feed roller 2 is recorded. What is stored in the line feed amount storage unit 15 of the memory 12 of the device 1 is stored as a correction table in the line feed amount storage unit 15 of the memory 12 of the recording device 1. The correction value may be stored as a correction table. This is preferable for reducing the amount of data.

Also, the correction values are stored in a data ROM such as an E-square ROM, and this data ROM is incorporated in a part of the memory 12 of the recording apparatus 1 to form the line feed amount storage section 15 of the memory 12. Is also good.

Next, the operation of the present embodiment having the above-described configuration will be described.

According to the recording apparatus 1 of the present embodiment, when the recording apparatus 1 is turned on, a conventionally known initialization process is performed. At this time, the reference position marker 3 of the paper feed roller 2 is detected by the origin detecting means 4 and the origin (home position) of the rotation angle of the paper feed roller 2 is detected. When the origin of the rotation angle of the paper feed roller 2 is detected, the number of drive steps of the paper feed motor 8 is controlled based on the origin of the rotation angle of the feed roller 2, and the rotation phase of the paper This is matched with the drive step of the feed motor 8 to achieve the appropriateness. Then, the sheet P is inserted into a portion where the sheet P comes into contact with the sheet feed roller 2, and the sheet feed roller 8 is rotated by driving the sheet feed motor 8, and
Is transported by a predetermined amount necessary for line feed, and a line feed operation is performed.

At the time of the line feed operation, the roller angle position determining section 16 determines the angular position of the paper feed roller 2 with respect to the origin of the rotation angle of the paper feed roller 2, that is, the paper feed motor 8
The number of drive steps of the motor control unit 1 during line feed operation
Reference numeral 7 controls the rotation amount of the paper feed motor 8 based on the angular position of the paper feed roller 2 determined by the roller angle position determination unit 16 and the correction value stored in the line feed amount storage unit 15. That is, at the time of a line feed operation, the motor control unit 17 sets the correction value closest to the angular position of the paper feed roller 2 determined by the roller angle position determination unit 16 to the correction value stored in the line feed amount storage unit 15 during the line feed operation. From among them, the rotation amount of the paper feed motor 8 is corrected.

As described above, according to the storage device 1 of the present embodiment, the origin detecting means 4 detects the reference position marker 3 as a detected portion formed on the paper feed roller 2 and detects the angular position of the paper feed roller 2. The origin of the is surely detected. Then, the roller angular position determining unit 16 reliably determines the angular position of the paper feed roller 2 during the line feed operation. Further, the rotation amount of the paper feed motor 8 during the line feed operation of the recording apparatus 1 is determined by the line feed operation motor control unit 17 and the angular position of the paper feed roller 2 determined by the roller angle position determination unit 16 and the line feed amount storage unit. 15 and is surely controlled based on the rotation amount of the paper feed motor 8 necessary for line feed of the paper P, which is surely corrected based on the correction value stored in 15.

Therefore, regardless of the processing accuracy of the paper feed roller 2, the accuracy of the line feed amount of the paper P can be kept high in units of μm.

The line feed amount of the paper P is determined by the paper feed roller 2.
And the correction value stored in the line feed amount storage unit 15, a highly accurate and complicated detection device for detecting the rotation amount of the paper feed roller 2 by the recording apparatus 1 itself, and A control unit for detecting the feed amount of the paper from the rotation amount of the paper feed detection roller based on the detection result of the apparatus and controlling the feed amount of the paper P by the paper feed motor 8 is not required,
As a result, it is possible to reduce the number of parts, to reduce the cost, and to reduce the weight.

Furthermore, the configuration in which the line feed amount of the paper P is controlled based on the angular position of the paper feed roller 2 and the correction value stored in the line feed amount storage unit 15 reduces the data amount of the correction value itself. In addition, the operation time of the motor control unit 17 during the line feed operation is short, and
2. With a small amount of software, software development can be performed in a short time with a small amount of labor, it can be inexpensive, and the line feed operation can be performed in a short time. The recording speed can be improved even with a high-resolution recording device having a small resolution.

Here, the paper feed control method of the present embodiment used in the recording apparatus of the present embodiment will be described.

In the paper feed control method of the present embodiment used in the recording apparatus 1 of the present embodiment, the reference position marker 3 as the detected portion which is driven to rotate by the paper feed motor 8 and becomes the measurement point of the origin of the rotation angle is used. When the paper feed roller 2 provided is formed, the paper feed amount of the paper feed roller 2 and the rotation amount of the paper feed motor 8 with respect to the origin of the rotation angle of the paper feed roller 2 are used as the reference. Measure the relationship
Based on the measurement result, a correction value for correcting the rotation amount of the paper feed motor 8 required for the line feed of the paper P by the paper feed roller 2 is acquired, and the paper feed roller 2 used for this measurement is incorporated in the recording apparatus 1. At the same time, the correction value is stored in the recording device 1 and the paper feed motor 2 is used when the recording device 1 performs a line feed operation.
Is controlled based on the correction value.

By adopting such a configuration, the paper feed roller 2 can control the paper feed amount of the paper feed roller 2 and the rotation amount of the paper feed motor 8 for each manufactured paper feed roller 2. The relationship is measured, and a correction value for correcting the rotation amount of the paper feed motor 8 required for the line feed of the paper P by the paper feed roller 2 based on the measurement result is easily obtained. Further, the rotation amount of the paper feed motor 8 during the line feed operation of the recording apparatus 1 is controlled using a correction value unique to the paper feed roller 2 incorporated in the recording apparatus 1. Therefore, regardless of the processing accuracy of the paper feed roller 2, the accuracy of the line feed amount of the paper P can be kept high in units of μm.

FIG. 4 is a block diagram showing a configuration of a main part of a second embodiment of the recording apparatus according to the present invention to which the paper feed control method according to the present invention is applied.

The recording apparatus of the present embodiment can be used in various recording modes, for example, a general single-color or full-color recording mode for recording on plain paper, a postcard recording mode for recording a single-color or full-color on a postcard, and OHP paper. OHP sheet recording mode for single-color or full-color recording, recording mode for single-color or full-color recording on an iron sheet, sticker recording mode for single-color or full-color recording on sticker paper, high-quality single color similar to photographic quality on specialty paper Alternatively, it is formed so that a high-quality recording mode for performing full-color recording can be selected.

As shown in FIG. 4, the recording apparatus 1A of this embodiment has a paper selection switch 25 for selecting the type of paper P.
Are connected to the control means 10A. The paper selection switch 25 switches the paper P to be used for recording from various types of paper P such as plain paper, postcards, OHP paper, iron sheet paper, sticker paper, and special paper with improved surface smoothness. To choose. In other words, a general single-color or full-color recording mode for recording on plain paper, a postcard recording mode for recording single-color or full-color on a postcard, an OHP sheet recording mode for recording single-color or full-color on OHP paper, and a single-color for an iron sheet Or a wide variety of recording modes, such as a recording mode for full-color recording, a sticker recording mode for single-color or full-color recording on sticker paper, and a high-quality recording mode for high-quality single-color or full-color recording close to photographic quality on specialty paper This means that a mode is selected, and the type of the recording mode is selected as required according to a design concept or the like. That is, the paper selection switch 25 functions as a selection switch of a recording mode used for recording.

In the memory 12A of the control means 10A,
It has at least a line feed amount storage unit 15A, a roller angle position determination unit 16, a line feed operation time motor control unit 17A, a correction value selection control unit 18, and a storage unit 19A.

The line feed amount storage unit 15A stores the rotation amount of the paper feed motor 8 necessary for line feed of the paper P by the paper feed roller 2 corresponding to the paper feed roller 2 on a one-to-one basis. A correction value to be corrected is stored. This correction value is obtained for each type of paper P using the correction value obtaining system 30 described above.

The roller angle position judging section 16 detects the angle of the paper feed roller 2 based on a detection signal indicating that the reference point detecting means 4 detects the reference position marker 3 as a detection target, as in the first embodiment. A program for determining a position is stored.

In the line feed operation motor control unit 17A,
During the line feed operation, the angle selection position of the paper feed roller 2 determined by the roller angle position determination unit 16 and the paper selection switch 25 of the correction values selected by the correction value selection control unit 18 and stored in the line feed amount storage unit 15A. A program for controlling the amount of rotation of the paper feed motor 8 necessary for a line feed based on the correction value according to the setting is stored.

The storage section 19A stores, in addition to the programs and data stored in the storage section 19 of the first embodiment, programs and data for recording operations corresponding to various recording modes, such as design concepts and data. It is stored according to the specifications of the recording device 1A.

The other configuration is the same as that of the first embodiment described above, and the detailed description is omitted.

The recording apparatus 1 of the present embodiment having the above-described configuration
According to A, when the recording apparatus 1A is powered on, a conventionally known initialization process is performed. At this time, the reference position marker 3 of the paper feed roller 2 is detected by the origin detecting means 4 and the origin (home position) of the rotation angle of the paper feed roller 2 is detected. When the origin of the rotation angle of the paper feed roller 2 is detected, the number of drive steps of the paper feed motor 8 is controlled based on the origin of the rotation angle of the feed roller 2, and the rotation phase of the paper This is matched with the drive step of the feed motor 8 to achieve the appropriateness. Then, the user operates the sheet selection switch 25 to set the type of the sheet P used for recording, that is, the recording mode. And
When the type of paper P used for recording is selected and set by the paper selection switch 25, the correction value selection control unit 18 uses the correction value for each type of paper P stored in the line feed amount storage unit 15A during the line feed operation. Select the correction value to be used. Then
The paper P is inserted into a portion that comes into contact with the paper feed roller 2, and the paper feed motor 8 is driven to rotate the paper feed roller 2 to convey the paper P by a predetermined amount required for line feed and perform a line feed operation. .

At the time of the line feed operation, the roller angle position determining section 16 determines the angular position of the paper feed roller 2 with respect to the origin of the rotation angle of the paper feed roller 2, that is, the paper feed motor 8
The number of drive steps of the motor control unit 1 during line feed operation
7A is the angle position of the paper feed roller 2 determined by the roller angle position determination unit 16 and the correction value stored in the line feed amount storage unit 15A selected by the correction value selection control unit 18 among the paper selection switches 25. The rotation amount of the paper feed motor 8 is controlled based on the correction value according to the setting. That is, the line feed operation time motor control unit 17A
The correction value closest to the angle position of the paper feed roller 2 determined by the roller angle position determination unit 16 is stored in the line feed amount storage unit 15A.
Is called in accordance with the type of the paper P used for recording from the correction value stored in the storage unit, and the rotation amount of the paper feed motor 8 is corrected.

As described above, according to the storage device 1 A of the present embodiment, the origin detecting means 4 detects the reference position marker 3 as a detected portion formed on the paper feed roller 2 and detects the angular position of the paper feed roller 2. The origin of the is surely detected. Then, the roller angle position determination unit 16 determines whether the paper feed roller 2
Is reliably determined. Further, the paper selection switch 25 is used to select the type of paper P used for recording, for example, plain paper,
Postcards, OHP paper, iron sheet paper, sticker paper,
Selects special paper with improved surface smoothness, etc., and as a result, general single-color or full-color recording mode for recording on plain paper, postcard recording mode for single-color or full-color recording on postcards, single-color for OHP paper OHP sheet recording mode for full-color recording, recording mode for single-color or full-color recording on an iron sheet, sticker recording mode for single-color or full-color recording on sticker paper, high-quality single-color A recording mode used for recording can be selected and set from various recording modes such as a high-quality recording mode for performing full-color recording. Further, the correction value selection control unit 1
Reference numeral 8 reliably selects a correction value to be used at the time of a line feed operation from the correction values for each type of sheet P stored in the line feed amount storage unit 15A according to the setting of the sheet selection switch 25. Further, the line feed operation motor control unit 17A determines the line feed amount of the sheet P based on the angle position of the paper feed roller 2 determined by the roller angle position determination unit 16 and the correction value selected by the correction value selection control unit 18. Is reliably controlled for each type of paper P.

Accordingly, regardless of the processing accuracy of the paper feed roller 2, the accuracy of the line feed amount of the paper P can be maintained at a high level in μm.

The line feed amount of the paper P is determined by the paper feed roller 2.
Is controlled for each type of the paper P, that is, for each recording mode based on the angular position of the paper P and the correction value selected by the correction value selection control unit 18. Therefore, the rotation amount of the paper feed roller 2 is detected by the recording apparatus 1A itself. And a control unit for detecting the feed amount of the paper from the rotation amount of the paper feed detection roller based on the detection result of the detection device and controlling the feed amount of the paper P by the paper feed motor 8 As a result, the number of parts can be reduced and the cost can be reduced, and the weight can be reduced.

Further, the configuration in which the line feed amount of the paper P is controlled for each type of the paper P based on the angular position of the paper feed roller 2 and the correction value selected by the correction value selection control unit 18 is different from the correction value itself. In addition to reducing the amount of data, the processing time of the motor control unit 17A during a line feed operation is short, only a small amount of memory and small software are required, and software development can be performed in a short time with little effort. It is possible to perform the line feed operation in a short period of time, and it is possible to use a high-resolution recording device with a small amount of line feed in recent years even if it has various recording modes. Can be improved.

Here, the paper feed control method of the present embodiment used in the recording apparatus of the present embodiment will be described.

The paper feed control method according to the present embodiment used in the recording apparatus 1A according to the present embodiment uses the reference position marker 3 as a detected portion which is driven to rotate by the paper feed motor 8 and becomes a measurement point of the origin of the rotation angle. When the paper feed roller 2 provided is formed, the paper feed amount of the paper feed roller 2 and the rotation amount of the paper feed motor 8 with respect to the origin of the rotation angle of the paper feed roller 2
Specifically, the relationship between the number of steps of the paper feed motor 8 and the
And a correction value for correcting the rotation amount of the paper feed motor 8 necessary for the line feed of the paper P by the paper feed roller 2 based on the measurement result is obtained for each type of the paper P. The paper feed roller 2 provided in the recording apparatus 1A is incorporated into the recording apparatus 1A, and the correction value for each type of the paper P is stored in the recording apparatus 1A to correct the rotation amount of the paper feed motor 8 during the line feed operation of the recording apparatus 1A. Control is performed for each sheet type based on the value.

By adopting such a configuration, the paper feed roller 2 can control the paper feed amount of the paper feed roller 2 and the rotation amount of the paper feed motor 8 for each manufactured paper feed roller 2. The relationship is measured for each type of paper P, and a correction value for correcting the amount of rotation of the paper feed motor 8 required for line feed of the paper P by the paper feed roller 2 based on the measurement result is easily determined for each type of paper P. Is obtained. The amount of rotation of the paper feed motor 8 during the line feed operation of the recording apparatus 1A is controlled for each type of paper P using a correction value unique to the paper feed roller 2 incorporated in the recording apparatus 1A. Therefore, regardless of the processing accuracy of the paper feed roller 2, the accuracy of the line feed amount of the paper P can be kept high in μm units for each type of paper P, that is, for each of various recording modes.

The present invention is not limited to the above embodiments, but can be variously modified as needed.

[0072]

As described above, according to the paper feed control method according to the first aspect of the present invention, the paper feed roller is provided for each of the manufactured individual paper feed rollers. The relationship with the rotation amount of the paper feed motor is measured, and a correction value for correcting the rotation amount of the paper feed motor required for line feed of the paper by the paper feed roller is acquired based on the measurement result. The amount of rotation of the paper feed motor during the line feed operation of the recording apparatus is controlled using a correction value unique to the paper feed roller incorporated in the recording apparatus. Therefore, an extremely excellent effect is achieved such that the accuracy of the line feed amount of the paper can be maintained at a high level in μm irrespective of the processing accuracy of the paper feed roller.

According to the paper feed control method of the present invention, the paper feed roller is provided for each manufactured paper feed roller and the paper feed amount of the paper feed roller and the rotation of the paper feed motor. The relationship with the amount is measured for each type of paper, and a correction value for correcting the amount of rotation of the paper feed motor required for line feed of the paper by the paper feed roller based on the measurement result is obtained for each type of paper. . Further, the rotation amount of the paper feed motor during the line feed operation of the recording apparatus is controlled for each type of paper using a correction value unique to the paper feed roller incorporated in the recording apparatus. Accordingly, an extremely excellent effect can be achieved such that the accuracy of the line feed amount of the paper can be kept high in units of μm for each type of paper, that is, for each of various recording modes regardless of the processing accuracy of the paper feed roller.

Further, according to the recording apparatus of the present invention, it is possible to maintain the accuracy of the line feed amount of the paper in a unit of μm irrespective of the processing accuracy of the paper feed roller. Further, since the line feed amount of the paper can be controlled based on the angular position of the paper feed roller and the correction value stored in the line feed amount storage unit, the recording apparatus itself can detect the rotation amount of the paper feed roller. It requires a highly accurate and complicated detection device and a control unit that detects the paper feed amount from the rotation amount of the paper feed detection roller based on the detection result of the detection device and controls the paper feed amount by the paper feed motor. However, as a result, the number of parts can be reduced, the cost can be reduced, and the weight can be reduced. Furthermore, the configuration in which the line feed amount of the paper is controlled based on the angular position of the paper feed roller and the correction value stored in the line feed amount storage unit has a short processing time in the motor control unit during line feed operation, and has a small capacity. With a small amount of memory and small software, software development can be done in a short time with little effort, it can be inexpensive, and line feed operation can be done in a short time. Even with a high-resolution recording device having a small size, an extremely excellent effect such as an improvement in recording speed can be achieved.

Further, according to the recording apparatus of the present invention, the accuracy of the line feed amount of the paper can be maintained high in units of μm regardless of the processing accuracy of the paper feed roller. Further, the line feed amount of the paper can be controlled for each type of paper, that is, for each recording mode based on the angular position of the paper feed roller and the correction value selected by the correction value selection control unit. A high-precision and complicated detection device for detecting the rotation amount of the paper feed roller, and detecting the paper feed amount from the rotation amount of the paper feed detection roller based on the detection result of the detection device, and detecting the paper feed amount by the paper feed motor. This eliminates the need for a control unit that controls the feed amount, and as a result, it is possible to reduce the number of parts and make it inexpensive,
Lightening can also be achieved. Still further, the configuration in which the line feed amount of the sheet is controlled for each sheet type based on the angular position of the paper feed roller and the correction value selected by the correction value selection control unit is a processing time in the line feed operation motor control unit. Short, small-capacity memory and small software, software development can be done in a short time with little effort, it can be inexpensive, and line feed operation can be done in a short time Therefore, even in the case of a recent high-resolution recording apparatus having a small line feed amount and having various recording modes, an extremely excellent effect such as an improvement in recording speed can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of a recording apparatus according to the present invention to which a paper feed control method according to the present invention is applied.

FIG. 2 is a block diagram showing a configuration of a main part of FIG. 1;

FIG. 3 shows an example of a configuration of a correction value acquisition system for acquiring a correction value to be stored in a line feed amount storage unit of one embodiment of a recording apparatus according to the present invention to which the paper feed control method according to the present invention is applied. Block Diagram

FIG. 4 is a view similar to FIG. 2, showing a main part of a second embodiment of the recording apparatus according to the present invention to which the paper feed control method according to the present invention is applied;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Recording device 2 Paper feed roller 3 Reference position marker (as a part to be detected) 4 Origin detection means 8 Paper feed motor 10, 10A Control means 11 CPU 12, 12A memory 15, 15A Line feed amount storage unit 16 Roller angle position Judgment unit 17, 17A Motor control unit during line feed operation 18 Correction value selection control unit 19 Storage unit 20 Recording head 25 Paper selection switch P Paper

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C058 AB02 AB03 AB08 AB15 AB22 AC06 AC07 AF20 AF23 GA02 GA03 GB07 GB13 GB20 GB43 GB48 GB53 GE03 2C480 CA02 CA41 CB03 EA07 EA29 3F048 AA05 AB01 BB02 BB05 DA06 EB21 EB29 EB10 EA10 EB10

Claims (4)

[Claims] When a paper feed roller having a portion to be detected which is driven to rotate by a paper feed motor and serves as a measurement point of the origin of the rotation angle is formed, the paper is rotated based on the origin of the rotation angle of the paper feed roller. A correction value for measuring the relationship between the paper feed amount of the feed roller and the rotation amount of the paper feed motor, and correcting the rotation amount of the paper feed motor required for line feed of the paper by the paper feed roller based on the measurement result. And get
Incorporating the paper feed roller used for this measurement into a recording device, and storing the correction value in the recording device,
A paper feed control method, wherein a rotation amount of the paper feed motor during a line feed operation of the recording device is controlled based on the correction value. 2. A method according to claim 1, further comprising the step of: forming a paper feed roller having a portion to be detected, which is driven by a paper feed motor and serving as a measurement point of the origin of the rotation angle, based on the origin of the rotation angle of the paper feed roller. The relationship between the paper feed amount of the feed roller and the rotation amount of the paper feed motor is measured for each type of paper, and the rotation amount of the paper feed motor required for line feed of the paper by the paper feed roller based on the measurement result. The paper feed roller used for this measurement is acquired in a recording device, and the correction value for each paper type is stored in the recording device. Controlling the amount of rotation of the paper feed motor during a line feed operation for each type of paper based on the correction value. 3. A paper feed roller that is driven to rotate by a paper feed motor, and corrects the amount of rotation of the paper feed motor required for line feed of the paper by the paper feed roller corresponding to the paper feed roller on a one-to-one basis. A line feed amount storage unit in which a correction value is stored in advance; a detected unit that is a measurement point of the origin of the rotation angle of the paper feed roller; an origin detection unit that detects the detected unit; A roller angular position determining unit that determines an angular position of the paper feed roller based on a detection signal detected by a detecting unit; and an angular position of the paper feed roller determined by the roller angular position determining unit and a line feed operation during a line feed operation. A recording device, comprising: a line feed operation-time motor control unit that controls a rotation amount of a paper feed motor based on a correction value stored in a line feed amount storage unit. 4. A paper feed roller rotated by a paper feed motor, and a paper feed motor necessary for line feed of each type of paper by the paper feed roller corresponding to the paper feed roller on a one-to-one basis. A line feed amount storage unit in which a correction value for correcting the rotation amount is stored in advance; a detected unit serving as a measurement point of the origin of the rotation angle of the paper feed roller; an origin detection unit for detecting the detected unit; A roller angle position determining unit that determines an angular position of the paper feed roller based on a detection signal in which the detecting unit detects the detected portion; a paper selection switch for selecting a paper type; and setting of the paper selection switch. A correction value selection control unit that selects a correction value to be used at the time of a line feed operation from the correction values for each sheet type stored in the line feed amount storage unit in response to the command. The paper is determined based on the determined angular position of the paper feed roller and the correction value corresponding to the setting of the paper selection switch among the correction values stored in the line feed amount storage unit selected by the correction value selection control unit. And a motor control unit for line feed operation for controlling the rotation amount of the feed motor.