JP3251317B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for printing out image data, and more particularly to a recording apparatus using a stepping motor as a driving source for conveying recording paper.

[0002]

2. Description of the Related Art Conventionally, a recording apparatus for printing and outputting image data is frequently used as a printer such as a facsimile apparatus. This recording apparatus has a transport mechanism for transporting a recording sheet to a recording section. In order to maintain the recording accuracy at a high level, the recording paper transport by this transport mechanism is required to have a capability of accurately transporting the recording paper to a recording position. For this reason, a stepping motor that guarantees a rotational position with step accuracy is used for driving the transport mechanism.

It is known that not only the stepping motor but also the output torque of the motor generally decreases as the temperature of the motor increases. For this reason, when the motor is driven under a condition in which the temperature of the motor becomes high (atmospheric temperature, excitation method, excitation speed, etc.), the torque becomes insufficient with respect to the load of the actual machine, and there is a possibility that the motor may step out. Therefore,
For example, in a facsimile apparatus described in Japanese Patent Application Laid-Open No. 2-220561, the current applied to the motor at the time of stop is set lower than the current value at the time of driving, thereby reducing the motor heat generation and the current consumption. A recording device has been proposed.

[0004]

However, in such a conventional recording apparatus, only a configuration for reducing the amount of heat generated when the motor is stopped is disclosed. No consideration is given to reducing the amount of heat generated. Here, with reference to FIG. 7, a description will be given of a heat generation characteristic due to energization of the motor. When the motor is energized, the internal temperature of the motor increases due to the resistance of the motor coil. This temperature rises in a form proportional to the drive current value and the drive frequency (excitation frequency). That is, when the applied current value is large, the temperature rise is large, and when the applied current is small, the temperature rise is small. Also, the temperature rise is large when the excitation frequency is high.

In view of the above, a first aspect of the present invention is a recording apparatus in which a drive frequency is changed in accordance with a motor temperature to suppress a rise in the temperature of the motor and to minimize uneven recording paper feeding as a side effect of the rise in the temperature. It is intended to provide. If the motor temperature rises, the motor
Stop the data drive and store the unrecorded image data.
As a result, image recording resumes in good condition after the temperature drops
It is an object of the present invention to provide a recording device that can perform the recording. Ma
The amount of unrecorded image data has reached a certain level
Resumes a fixed amount of image recording from
Provide a recording device that suppresses the degree of temperature rise while performing
It is intended to be. Further , according to the second aspect of the present invention, the drive frequency is changed according to the motor temperature.
Control the motor temperature rise, and
A recording device that minimizes irregularities in feeding the recording paper
It is intended to be. It is another object of the present invention to provide a recording apparatus capable of realizing a motor drive synchronized with a recording speed by changing a through-up time in a recording unit according to a change in a motor drive frequency. Also,
If motor temperature rises, stop motor drive and leave blank
By storing the image data of the
Device that can restart image recording in good condition
It is intended to be. Unrecorded image data
When the amount of stored data reaches a certain level, a certain amount of image recording is restarted.
Opening allows the temperature to rise while recording images.
The purpose is to provide a recording device that reduces the degree
You.

According to a third aspect of the present invention, there is provided a recording apparatus in which a driving method is changed in accordance with a motor temperature to suppress an increase in the temperature of the motor and to minimize uneven recording paper feeding as a side effect of the temperature increase. It is intended to provide. If the motor temperature rises,
To stop recording and store unrecorded image data.
It is possible to resume image recording in good condition after the temperature drops
It is an object of the present invention to provide a recording device. Also, not yet
Constant when the amount of stored image data reaches a certain level
Image recording by restarting image recording
To provide a recording device that suppresses the degree of temperature rise
It is an object. The invention according to claim 4 is a mode
By changing the drive method according to the motor temperature, the motor
Temperature rise, and as a side effect of temperature rise
To provide a recording device that minimizes irregularities in recording paper feeding
The purpose is. Another object of the present invention is to provide a recording apparatus capable of realizing a motor drive synchronized with a recording speed by changing a through-up time in a recording unit according to a change in a motor driving method. Also, the motor temperature
If the value rises, the motor drive stops and unrecorded image data
By accumulating data, good
To provide a recording device capable of restarting recording of an image in a state.
The purpose is. In addition, the storage amount of unrecorded image data is
When a certain level is reached, a certain amount of image recording should be resumed
Reduces the temperature rise while recording images
It is an object of the present invention to provide a recording device.

[0007]

[0008]

According to the first aspect of the present invention,
In order to achieve the above object, a transport mechanism that transports a recording sheet to a recording unit, a stepping motor that drives the transport mechanism, and an intermittent drive of the stepping motor in accordance with a state of writing image data by the recording unit. A control unit that controls a pulse rate and a drive current value, a detection sensor that detects a temperature of the stepping motor, and a pulse rate and a drive current value of the stepping motor with respect to the detected motor temperature. Pulse rate changing means for changing a pulse rate and a drive current value by referring to a pulse rate table defined in advance, a pulse rate table when the motor temperature becomes equal to or more than a predetermined value, and a motor temperature equal to or more than a predetermined value
Stops writing to recording paper by the recording unit when
Writing stop means for writing, and the writing stopped image
The storage memory for storing data and the motor temperature
Reads image data from the storage memory
Restarting method to restart writing that has been stopped
And stop when the storage memory is full
Resumed writing and restarted motor control.
It is characterized in that the drive is changed from the discontinuous drive to the continuous drive .

According to a second aspect of the present invention, in order to achieve the above object, a transport mechanism for transporting a recording sheet to a recording section.
And a stepping motor for driving the transport mechanism.
Of the image data by the recording unit
Pulse train to intermittently drive according to the writing situation
And a control unit for controlling the driving current value and the driving current value.
In the apparatus, the temperature of the stepping motor is detected.
Detection sensor, and the aforementioned sensor for the detected motor temperature.
Predict the pulse rate and drive current value of the stepping motor.
The pulse rate table defined in advance and the motor temperature
When the value exceeds a predetermined value, the pulse rate table is
Pal to change pulse rate and drive current value by referring to
A slate changing means, and a through-up table are predefined the through-up time of the recording unit with respect to the pulse rate, the through-up time by referring to the through-up table when you change the pulse rate by the pulse rate changing device and the through-up changing means for changing, mode
Recording by the recording unit when the data temperature exceeds a predetermined value
Writing stop means for stopping writing on paper, and writing
A storage memory for storing image data for which
When the motor temperature has dropped sufficiently,
Read image data and resume writing that was stopped
Writing restart means for causing the storage memory to
Restarts the write that was stopped when the
It characterized the this <br/> to change continuously driven motor control after opening the intermittent driving.

According to a third aspect of the present invention, in order to attain the above object, a transport mechanism for transporting a recording sheet to a recording unit, a stepping motor for driving the transport mechanism, and the stepping motor are connected to the recording unit. A control unit that controls a pulse rate and a drive current value so as to intermittently drive in accordance with the state of writing image data by a sensor, a detection sensor that detects the temperature of the stepping motor, and a motor that is detected. A driving method table in which a driving method of the stepping motor with respect to temperature is defined in advance, and a driving method changing unit that changes the driving method by referring to the driving method table when the motor temperature becomes a predetermined value or more, and a motor. If the temperature exceeds a specified value
To stop writing on the recording paper by the recording unit
Storage means for storing the image data for which writing has been stopped.
Storage memory to be stored and when the motor temperature has dropped sufficiently
Read image data from the storage memory and stop
Writing restart means for restarting the
Stop when the storage memory is full.
Resumed writing, and check whether the motor control after restarting is intermittent drive.
It is characterized by changing to continuous driving from

According to a fourth aspect of the present invention, in order to achieve the above object, a transport mechanism for transporting a recording sheet to a recording section.
And a stepping motor for driving the transport mechanism.
Of the image data by the recording unit
Pulse train to intermittently drive according to the writing situation
And a control unit for controlling the driving current value and the driving current value.
In the apparatus, the temperature of the stepping motor is detected.
Detection sensor, and the aforementioned sensor for the detected motor temperature.
Driving method in which the driving method of the stepping motor is defined in advance
When the motor temperature exceeds a predetermined value, the formula table
A drive that changes the drive method with reference to the drive method table
Moving system changing means, a through-up table in which the through-up time of the recording unit for the driving system is defined in advance,
A through-up changing means for changing the through-up time by referring to the through-up table when you change the drive method by the drive method change means, the motor temperature is predetermined
When the value exceeds the value, writing to recording paper by the recording unit
Means for stopping writing, and means for stopping writing
The storage memory for storing the image data
Image data from the storage memory
Write that restarts the write that has stopped
When the storage memory becomes full.
Resumes writing that was stopped by
And changes the control to the intermittent drive or et continuous drive.

[0012]

[0013]

[0014]

According to the first aspect of the present invention, the pulse rate and the drive current value of the stepping motor with respect to the motor temperature are previously defined in a pulse rate table, and the temperature of the stepping motor detected by the detection sensor is determined. When the pulse rate is equal to or more than the predetermined value, the pulse rate changing means changes the pulse rate and the drive current value with reference to the pulse rate table. Also, the motor
When the temperature exceeds a predetermined value, the write stop means
Stops writing on the recording paper by the
The stopped image data is stored in the storage memory, and the motor temperature
When the temperature drops sufficiently, the writing restart means
Reads image data from memory and stops writing
Restart burning. Also, the storage memory is full
The writing that was stopped at that point is resumed, and the
The controller control is changed from intermittent drive to continuous drive.

According to the second aspect of the present invention, the stepping motor varies with respect to the motor temperature.
Pulse rate and drive current value
Is defined in advance in the
When the temperature of the stepping motor exceeds a predetermined value
Wherein the pulse rate changing means is configured to control the pulse rate table.
And change the pulse rate and the drive current value.
In addition, the slew-up time of the recording unit with respect to the pulse rate is defined in advance in the slew-up table, and when the pulse rate is changed by the pulse rate changing means, the slew-up changing means refers to the slew-up table. Change the time. Also, the motor temperature
If the value exceeds a predetermined value, the writing stop means
Stop writing on the recording paper, and stop writing.
The stored image data is stored in the storage memory and the motor temperature is
Min writing resume means lowered when the storage memory
Read image data from and stop writing
To resume. Also, when the storage memory is full,
Restart the stopped writing and motor control after restarting
Is changed from intermittent drive to continuous drive. Further, in the invention according to claim 3 having the above configuration, the driving method of the stepping motor with respect to the motor temperature is defined in advance in the driving method table, and the temperature of the stepping motor detected by the detection sensor becomes equal to or higher than a predetermined value. If
The driving method changing means changes the driving method with reference to the driving method table. Also, if the motor temperature exceeds a predetermined value,
If the writing stops, the recording
Stop writing, and stop writing image data
Is stored in the storage memory, and when the motor temperature falls sufficiently
At this point, the writing resuming means stores the image data
And restart the stopped writing.
Also, it stopped when the storage memory became full
Restart writing, and restart motor control from intermittent drive
Change to continuous drive.

Further, in the invention according to the fourth aspect having the above configuration, the stepping motor with respect to the motor temperature is controlled.
Drive method is defined in advance in the drive method table,
Temperature of the stepping motor detected by the sensor
Is greater than or equal to a predetermined value, the driving method changing means
Change the driving method with reference to the driving method table. Ma
In addition, the through-up time of the recording unit for the drive system is defined in advance in the through-up table, and when the drive system is changed by the drive system changing unit, the through-up change unit refers to the through-up table to perform the through-up. Change the time. Also, if the motor temperature exceeds a predetermined value,
If the writing stops, the recording
Stop writing, and stop writing image data
Is stored in the storage memory, and when the motor temperature falls sufficiently
At this point, the writing resuming means stores the image data
And restart the stopped writing.

[0017] The storage memory is resumed writing had been stopped when it becomes full, to change the continuous driving of the motor control after resumption from the intermittent drive.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
FIG. 6 is a configuration diagram showing a recording apparatus according to one embodiment of the present invention. First, the configuration will be described. In the figure, a roll-shaped recording paper 11 is stored in a roll paper holder 12 and supplied to a recording unit 13. The recording unit 13 is provided with a thermal head 14 for performing thermal recording, and the recording paper 11 is transferred by a platen roller 15 as a transport mechanism.
It is transported while being pressed against. This platen roller 15
Is driven by a stepping motor 17 via a power transmission system (gear system) 16. The pulse rate (drive frequency) and the drive current value of the stepping motor 17 are controlled by a control unit such as a CPU (not shown) so that the stepping motor 17 is intermittently driven in accordance with the writing state of the image data by the recording unit 13. ing. The recording paper 11 being conveyed is given a constant tension by a paper guide 18.

Here, the thermistor 19 detects the temperature of the stepping motor 17 as a detection sensor which is a characteristic component of the present invention. According to the present invention, the driving frequency and the driving method of the stepping motor 17 are changed based on the motor temperature detected by the thermistor 19. Hereinafter, the present invention will be described step by step.

FIG. 1 is a block diagram showing a motor control system which is a first embodiment of the recording apparatus according to the present invention. In the figure, first, as described above, the motor controller 21 controls the pulse rate (drive frequency) and drive current of the stepping motor 17 so as to intermittently drive the stepping motor 17 in accordance with the writing state of the image data by the recording unit 13. In addition to controlling the value, the pulse rate changing means of the present invention changes the pulse rate and the drive current value for driving the stepping motor 17 when the motor temperature detected by the thermistor 19 becomes equal to or higher than a predetermined value. Here, the pulse rate and the drive current value with respect to the motor temperature are defined in the pulse rate table 22 in advance. The paper sensor 23 detects the presence or absence or the remaining amount of the recording paper 11 in the roll paper holder 12 shown in FIG.

Next, the operation will be described. 6 and 1, the stepping motor 17 is driven at an exciting frequency and an exciting current value which are predetermined by the motor controller 21. At this time, the motor controller 21
The thermistor 19 is constantly monitored, and when the motor temperature becomes equal to or higher than a predetermined value, the pulse rate corresponding to the motor temperature is read from the pulse rate table 22. The pulse rate table 22 is previously stored in the system as a ROM, and its value is set so as to be a pulse rate for exciting the motor, which is slower than the initial pulse rate. Thereafter, the motor is driven at the pulse rate until the motor temperature becomes equal to or lower than a predetermined value. When the motor temperature decreases, the motor returns to the original pulse rate. In addition,
The strobe timing of the write thermal head 14 is also changed.

As described above, in the present embodiment, the temperature of the stepping motor 17 is monitored in real time, and when the motor temperature exceeds a certain temperature, the pulse rate is automatically changed to a value that suppresses motor heat generation. As a result, heat generation of the motor can be suppressed, a rise in the ambient temperature and step-out of the motor due to the heat generation can be prevented, and stable operation can be expected under any environment.

Hereinafter, the present invention will be described based on a second embodiment. FIG. 2 is a block diagram showing a motor control system which is a second embodiment of the recording apparatus according to the present invention. In the present embodiment, the same components as those in the above-described example are denoted by the same reference numerals, and a specific description thereof will be omitted. First, the configuration will be described. In the figure, a through-up table 31 stores the pulse rate of the stepping motor 17 in the recording unit 1.
3 is defined in advance. in this case,
The motor controller 21 refers to the through-up table 31 and changes the through-up time when the pulse rate is changed by the pulse rate changing unit.

Next, the operation will be described. 6 and 2, when reading out the pulse rate from the pulse rate table 22, the motor controller 21 refers to the through-up table 31 at the same time, and uses the through-up time corresponding to the pulse rate to read out the stepping motor 1.
7 is driven. The through-up table 31 is a ROM in which values corresponding to the remaining amount of recording paper and the pulse rate obtained at that time from the paper sensor 23 are stored in the ROM in advance. By changing the through-up time, the write time per line by the thermal head 14 is changed, and write timing suitable for driving the motor can be realized.

As described above, in this embodiment, since the stepping motor 17 is driven under an appropriate through-up condition according to the state of driving the motor, even if the driving state of the motor is changed, side effects such as image white streaks or noise are caused. Can be suppressed. Hereinafter, the present invention will be described based on a third embodiment. FIG. 3 is a block diagram showing a motor control system which is a third embodiment of the recording apparatus according to the present invention. In the present embodiment, the same components as those in the above-described example are denoted by the same reference numerals, and a specific description thereof will be omitted.

First, the configuration will be described. In the figure, a driving method table 41 defines a driving method of the stepping motor 17 with respect to the motor temperature detected by the thermistor 19, for example, 1-2-phase excitation, 2-phase excitation, and the like. In this case, the motor controller 21 changes the driving method as a driving method changing unit by referring to the driving method table 41 when the motor temperature becomes equal to or higher than a predetermined value.

Next, the operation will be described. 6 and 3, the stepping motor 17 is driven by a motor controller 21 at an excitation frequency and an excitation method that are predetermined. At this time, the motor controller 21
Monitors the thermistor 19 constantly, and reads the driving method (1-2-phase excitation or two-phase excitation) corresponding to the motor temperature from the driving method table 41 when the motor temperature becomes equal to or higher than a certain value. The driving method table 41 is previously stored in the system as a ROM, and is set so as to excite the stepping motor 17 in a method that generates less heat than the original driving method. Thereafter, the motor is driven by the driving method until the motor temperature becomes equal to or lower than a certain value. When the motor temperature decreases, the motor is returned to the original driving method. Also,
At the same time, the strobe timing of the write thermal head 14 is also changed.

As described above, in the present embodiment, the temperature of the stepping motor 17 is monitored in real time, and when the motor temperature becomes higher than a certain temperature, the driving method is changed to a method that automatically suppresses the heat generation of the motor. As a result, heat generation of the motor can be suppressed, a rise in the ambient temperature and step-out of the motor due to the heat generation can be prevented, and stable operation can be expected under any environment.

Hereinafter, the present invention will be described based on a fourth embodiment. FIG. 4 is a block diagram showing a motor control system which is a fourth embodiment of the recording apparatus according to the present invention. In the present embodiment, the same components as those in the above-described example are denoted by the same reference numerals, and a specific description thereof will be omitted. First, the configuration will be described. In the figure, the through-up table 31 defines the through-up time of the recording unit 13 for the driving method of the stepping motor 17 in advance. In this case, the motor controller 21 uses
When the driving method of the motor is changed by the driving method changing means, the through-up time is changed with reference to the through-up table 31.

Next, the operation will be described. 6 and 4, when reading out the driving method from the driving method table 41, the motor controller 21 simultaneously refers to the through-up table 31 and drives the stepping motor 17 using the through-up time corresponding to the driving method. I do. The through-up table 31 is a ROM in which values corresponding to the remaining amount of recording paper and the driving method obtained at that time from the paper sensor 23 are stored in the ROM in advance. By changing the through-up time, the write time per line by the thermal head 14 is changed, and write timing suitable for driving the motor can be realized.

As described above, in this embodiment, since the stepping motor 17 is driven under an appropriate through-up condition according to the state of driving the motor, side effects such as image white streaks or noise can be obtained even if the driving state of the motor is changed. Can be suppressed. Hereinafter, the present invention will be described based on a fifth embodiment and a sixth embodiment. FIG. 5 shows a fifth embodiment of the recording apparatus according to the present invention.
It is a block diagram which shows the motor control system which is an Example and 6th Example. In the present embodiment, the same components as those in the above-described example are denoted by the same reference numerals, and a specific description thereof will be omitted.

First, the configuration of a fifth embodiment of the present invention will be described. In FIG. 5, the image input / output controller 51
Controls input and output of image data stored in the storage memory 52. The writing stop unit 53 stops writing on the recording paper 11 by the recording unit 13 when the motor temperature detected by the thermistor 19 becomes equal to or higher than a predetermined value. The image data for which writing has been stopped is temporarily stored in the storage memory 52 under the control of the image input / output controller 51. The writing restart means 54 reads the image data from the storage memory 52 when the motor temperature is sufficiently lowered, and restarts the writing of the recording unit 13 which has been stopped.

Next, the operation will be described. 6 and 5, when the motor temperature detected by the thermistor 19 is equal to or lower than a predetermined value specified by the system, the recording unit 13 writes the image data on the recording paper 11. When the motor temperature becomes equal to or higher than a predetermined value, the writing stop means 53
Requests the motor controller 21 to stop the motor. At this point, the motor controller 21 stops driving the stepping motor 17 and notifies the image input / output controller 51 of the stop of driving. The image input / output controller 51 accumulates image data in the accumulation memory 52 and performs proxy reception, which is called facsimile. In the facsimile apparatus using the recording apparatus of the present invention, when the driving of the motor is stopped, BUSY
A signal is sent to stop sending data from the other party.

After the motor is stopped, when the motor temperature falls below a certain value, the writing restart means 54 reads the image data from the storage memory 52 and restarts the driving by the motor controller 21 in order to restart the writing by the recording unit 13. Request. In this embodiment shown in FIG. 5, a configuration in which the pulse rate is changed is shown. However, a configuration in which the driving method is changed is naturally possible.

As described above, in this embodiment, the temperature of the stepping motor 17 is monitored in real time by the thermistor 19, and when the motor temperature exceeds a certain temperature, the motor drive is automatically stopped and the image data is stored. Since the data is temporarily stored in the memory 52, the writing can be resumed after the cooling of the motor to complete the recording. For this reason, in the facsimile apparatus employing this embodiment, even if the motor is heated to some extent, it is possible to receive the image data without losing the image data, and to realize a stable receiving operation.

Hereinafter, the configuration of the sixth embodiment of the present invention will be described. In FIG. 5, the write resuming means 54 operates even when the motor temperature does not fall.
Resumes the writing that had been stopped when was full. After resuming the writing, the motor controller 21 changes the motor control from intermittent driving to continuous driving.

Next, the operation will be described. 6 and 5, when the motor temperature detected by the thermistor 19 is equal to or lower than a predetermined value specified by the system, the recording unit 13 writes the image data on the recording paper 11. When the motor temperature becomes equal to or higher than a predetermined value, the writing to the page is completed, and then the writing stop unit 53 requests the motor controller 21 to stop the motor. At this point, the motor controller 21 stops driving the stepping motor 17 and notifies the image input / output controller 51 of the stop of driving. The image input / output controller 51 accumulates image data in the accumulation memory 52 and performs proxy reception, which is called facsimile.

Here, a part of the image memory 52 is used as a page memory to store image data in units of one page. Then, when one page becomes full, the writing restart means 54
Requests the motor controller 21 to restart the motor drive. The motor controller 21 changes the motor drive from intermittent drive to continuous drive, and prints an image in page units on the recording paper 1.
Record in 1.

After the motor temperature falls below a certain value,
While releasing the page memory restriction of the storage memory 52,
Image data is printed on the recording paper 11 by normal intermittent driving. Thus, in the present embodiment, the thermistor 19
The motor temperature is monitored in real time, and if the motor temperature rises above a certain temperature, it is changed from intermittent drive with a large temperature rise to continuous drive with a small temperature rise, and the operation automatically shifts to page-based write operation. Thus, stable recording can be performed without losing image data. For this reason, in the facsimile apparatus employing this embodiment, even if the motor is heated to some extent, it is possible to receive the image data without losing the image data, and to realize a stable receiving operation.

The recording apparatus described in the above embodiments can be realized by a single recording apparatus, but can be employed as a printer such as a facsimile apparatus or a word processor.

[0041]

As described above, according to the recording apparatus of the first aspect, the pulse rate and the drive current value of the stepping motor with respect to the motor temperature are defined in advance in the pulse rate table, and the detection sensor is used. When the temperature of the stepping motor detected by the above becomes equal to or higher than a predetermined value, the pulse rate changing means changes the pulse rate and the drive current value by referring to the pulse rate table, so that the heat generation of the motor is automatically suppressed. The pulse rate can be changed to such a value, the heat generation of the motor can be suppressed, the ambient temperature can be raised, and the motor can be prevented from stepping out due to the heat generation, and stable operation can be expected under any environment. Ma
Also, if the motor temperature exceeds a predetermined value, writing stops.
Stopping means for stopping writing on the recording paper by the recording unit,
Store the image data for which writing has been stopped in the storage memory
When the motor temperature has fallen sufficiently,
The stage reads the image data from the storage memory and stops
Resumes writing, so after motor cooling
Recording can be completed by restarting writing. Also, the accumulated memo
Restarts the write that was stopped when the memory became full
And the motor control after restart is changed from intermittent drive to continuous drive
To ensure stable recording without losing image data
Can be performed.

According to the recording apparatus of the second aspect of the present invention, the stepping motor is controlled with respect to the motor temperature.
Pulse rate and drive current values in pulse rate table
Defined in advance, and the status detected by the detection sensor
When the temperature of the
Loose rate changing means refers to the pulse rate table
To change the pulse rate and drive current value.
Change the pulse rate to dynamically suppress motor heat generation
To reduce the heat generated by the motor,
Motor can be prevented from stepping out due to any environment
Stable operation can be expected even underneath. In addition, the slew-up time of the recording unit with respect to the pulse rate is defined in advance in the slew-up table, and when the pulse rate is changed by the pulse rate changing means, the slew-up changing means refers to the slew-up table. Since the time is changed, it is possible to suppress side effects such as white streaks or noise even when the state of driving the motor is changed. Ma
Also, if the motor temperature exceeds a predetermined value, writing stops.
Stopping means for stopping writing on the recording paper by the recording unit,
Store the image data for which writing has been stopped in the storage memory
When the motor temperature has fallen sufficiently,
The stage reads the image data from the storage memory and stops
Resumes writing, so after motor cooling
Recording can be completed by restarting writing. Also, the accumulated memo
Restarts the write that was stopped when the memory became full
And the motor control after restart is changed from intermittent drive to continuous drive
To ensure stable recording without losing image data
Can be performed.

According to the recording apparatus of the present invention, the driving method of the stepping motor with respect to the motor temperature is previously defined in the driving method table, and the temperature of the stepping motor detected by the detection sensor is set to a predetermined value. When the value becomes equal to or more than the value, the driving method changing unit changes the driving method by referring to the driving method table, so that the driving method can be automatically changed to a driving method that suppresses motor heat generation,
Heat generation of the motor can be suppressed, and the motor can be prevented from rising out of the ambient temperature and stepping out of the motor due to heat generation, and stable operation can be expected under any environment. Also, if the motor temperature is
In the event that the above occurs, the writing stop means
Stop writing on the recording paper, and
The image data is stored in the storage memory and the motor temperature
At the point in time, the writing restart means
Reads image data and resumes stopped writing
To restart recording after motor cooling
I can complete it. Also, when the storage memory becomes full,
Restart the stopped writing and control the motor after restarting.
Since the mode is changed from intermittent drive to continuous drive, image data
Stable recording can be performed without dropping.

According to the recording apparatus of the present invention, the driving of the stepping motor with respect to the motor temperature is controlled.
The drive method is defined in advance in the drive method table, and the detection method
The temperature of the stepping motor detected by the sensor
If the value exceeds the predetermined value, the driving method changing means
Since changing the drive method with reference to the method table, automatic
Can be changed to a drive system that suppresses motor heat generation
Suppress motor heat, raise ambient temperature,
Data loss of synchrony and can be used in any environment.
Stable operation can be expected. In addition, the through-up time of the recording unit for the drive system is defined in advance in the through-up table, and when the drive system is changed by the drive system changing unit, the through-up change unit refers to the through-up table to perform the through-up. Since the time changes,
Even if the state of driving the motor is changed, side effects such as white streaks or noise can be suppressed.

Further , when the motor temperature becomes equal to or higher than a predetermined value, the writing stop means stops the writing to the recording paper by the recording unit, and stores the image data for which writing has been stopped in the storage memory. At this point, the writing restart means reads the image data from the storage memory and restarts the stopped writing, so that the writing can be restarted after the motor has cooled down to complete the recording.

[0046] Also, resume writing storage memory had been stopped when it becomes full, so to change the continuous driving of the motor control after resumption from the intermittent driving, recording that stably without missing the image data Can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a motor control system which is a first embodiment of a recording apparatus according to the present invention.

FIG. 2 is a block diagram showing a motor control system which is a second embodiment of the recording apparatus according to the present invention.

FIG. 3 is a block diagram showing a motor control system which is a third embodiment of the recording apparatus according to the present invention.

FIG. 4 is a block diagram showing a motor control system which is a fourth embodiment of the recording apparatus according to the present invention.

FIG. 5 is a block diagram showing a motor control system as a fifth or sixth embodiment of the recording apparatus according to the present invention.

FIG. 6 is a configuration diagram illustrating a recording apparatus according to an embodiment of the present invention.

FIG. 7 is a diagram showing heat generation characteristics due to energization of a motor.

[Explanation of symbols]

REFERENCE SIGNS LIST 11 recording paper 13 recording unit 14 thermal head 15 platen roller (transport mechanism) 17 stepping motor 21 motor controller (control unit, pulse rate changing means, through-up changing means, driving method changing means) 22 pulse rate table 31 through-up table 41 Drive method table 51 Image input / output controller 52 Storage memory 53 Write stop means 54 Write restart means

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02P 8/00 B65H 23/192

Claims (4)

(57) [Claims] A transport mechanism for transporting a recording sheet to a recording section; a stepping motor for driving the transport mechanism; and a pulse rate for intermittently driving the stepping motor in accordance with a state of writing image data by the recording section. And a control unit for controlling the drive current value, wherein a detection sensor for detecting the temperature of the stepping motor, and a pulse rate and a drive current value of the stepping motor with respect to the detected motor temperature are defined in advance. A pulse rate table, a pulse rate changing means for changing a pulse rate and a drive current value by referring to the pulse rate table when the motor temperature becomes a predetermined value or more, and a motor temperature becomes a predetermined value or more. Note by the recording unit
Writing stop means for stopping writing on recording paper, and a storage memory for storing image data for which writing has been stopped
From the storage memory when the motor temperature has fallen sufficiently.
Read image data and resume writing that was stopped
Writing restart means for causing the storage memory to stop when the storage memory becomes full.
A recording apparatus, wherein recording is restarted, and motor control after the restart is changed from intermittent driving to continuous driving . 2. A transport mechanism for transporting a recording sheet to a recording section, a stepping motor for driving the transport mechanism, and an image data generated by the recording section.
Pulse drive to intermittently drive according to the write status of
And a control unit for controlling the driving current value.
A recording sensor for detecting a temperature of the stepping motor in the recording device
And the stepping motor with respect to the detected motor temperature
Pulse rate and drive current value
Pulse rate table and the pulse rate when the motor temperature exceeds a predetermined value.
Pulse rate and drive current value with reference to
And pulse rate changing means for changing, through referring the through-up table are predefined the through-up time of the recording unit with respect to the pulse rate, the through-up table when you change the pulse rate by the pulse rate changing device A slew-up changing means for changing the up time, and recording by the recording unit when the motor temperature exceeds a predetermined value.
Writing stop means for stopping writing on recording paper, and a storage memory for storing image data for which writing has been stopped
From the storage memory when the motor temperature has fallen sufficiently.
Read image data and resume writing that was stopped
Writing restart means for causing the storage memory to stop when the storage memory becomes full.
A recording apparatus, wherein recording is restarted, and motor control after the restart is changed from intermittent driving to continuous driving . 3. A transport mechanism for transporting a recording sheet to a recording section, a stepping motor for driving the transport mechanism, and a pulse rate for intermittently driving the stepping motor in accordance with a state of writing image data by the recording section. And a control unit for controlling a drive current value, a detection sensor for detecting a temperature of the stepping motor, and a driving method in which a driving method of the stepping motor with respect to the detected motor temperature is defined in advance. A driving method changing means for changing the driving method by referring to the driving method table when the motor temperature becomes equal to or higher than a predetermined value;
Writing stop means for stopping writing on recording paper, and a storage memory for storing image data for which writing has been stopped
From the storage memory when the motor temperature has fallen sufficiently.
Read image data and resume writing that was stopped
Writing restart means for causing the storage memory to stop when the storage memory becomes full.
A recording apparatus, wherein recording is restarted, and motor control after the restart is changed from intermittent driving to continuous driving . 4. A transport mechanism for transporting a recording sheet to a recording section, a stepping motor for driving the transport mechanism, and an image data generated by the recording section.
Pulse drive to intermittently drive according to the write status of
And a control unit for controlling the driving current value.
A recording sensor for detecting a temperature of the stepping motor in the recording device
And the stepping motor with respect to the detected motor temperature
The driving method table in which the driving method is defined in advance and the driving method table when the motor temperature becomes a predetermined value or more.
Drive method changing means for changing the drive method with reference to the cable
When the through-up table are predefined the through-up time of the recording unit to the drive system, through changing the through-up time by referring to the through-up table when you change the drive method by the drive method change means Up change means and a recording unit when the motor temperature exceeds a predetermined value.
Writing stop means for stopping writing on recording paper, and a storage memory for storing image data for which writing has been stopped
From the storage memory when the motor temperature has fallen sufficiently.
Read image data and resume writing that was stopped
Writing restart means for causing the storage memory to stop when the storage memory becomes full.
A recording apparatus, wherein recording is restarted, and motor control after the restart is changed from intermittent driving to continuous driving .