JP3366974B2 - Linear shuttle drive control method, linear shuttle drive device, and linear shuttle type printer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control method of a linear shuttle which moves at a constant speed in a predetermined constant speed region and reversely moves in reverse regions on both sides of the constant speed region, and such a linear shuttle. The present invention relates to a printer equipped with a print head.

[0002]

2. Description of the Related Art FIGS. 4 to 6 show a print head for a linear shuttle which carries out a reciprocating continuous operation consisting of a constant velocity movement in a predetermined constant velocity area and a reversal movement in reversal areas on both sides of the constant velocity area. FIG. 3 is a diagram showing a main part of a linear shuttle type printer that is equipped with a printer and is configured to perform a printing process in a constant speed region thereof.

As shown in FIG. 4, a linear shuttle type printer includes a linear shuttle 2 having a print head 1 mounted thereon,
A shuttle drive unit having a linear motor 3 for driving the linear shuttle 2; the shuttle drive unit moves the linear shuttle 2 at a constant velocity in a predetermined constant velocity region, and the linear shuttle 2 travels in the inversion regions on both outer sides thereof. It is designed to reverse the direction. Then, when the linear shuttle 2 moves in the constant velocity region, the printing processing is performed on the sheet inserted between the print head 1 and the platen (not shown).

A yoke 30 is provided on the lower surface of the linear shuttle 2, and a plurality of permanent magnets 32a, 32b are provided on the lower surface of the yoke 30. On the other hand, a coil base 31 is provided on the frame, and electromagnetic coils 33a and 33b are provided on the coil base 31, and these electromagnetic coils 33a and 33b face the permanent magnets 32a and 32b on the linear shuttle 2 side. There is. The permanent magnets 32a and 32b and the electromagnetic coils 33a and 33b constitute the linear motor 3. The permanent magnet is divided into a constant-speed driving permanent magnet 32a located at both ends and a reversal driving permanent magnet 32b located at the center, and the electromagnetic coil also has a constant-speed driving electromagnetic magnet located at both ends. It is divided into a coil 33a and a reversing drive electromagnetic coil 33b located at the center.
When the electromagnetic coil 33b for reversing drive is energized, the print head 1
Is moved to the center of the permanent magnet 32b for reversing drive and the reversing operation is performed, and when the linear shuttle 2 is energized in the forward direction to the electromagnetic coil 33a for constant velocity driving, the electromagnetic coil 33a moves to the right.
When it is energized in the opposite direction, it moves to the left.

Further, as shown in FIG. 5, dampers 4 for buffering the movement of the linear shuttle 2 are provided on both outer sides of the reversing region of the linear shuttle 2. Furthermore,
As shown in FIG. 6, a slit plate 8 for detecting the position of the linear shuttle 2 is provided on the linear shuttle 2, and a position sensor 9 including a light emitting element 9a and a light receiving element 9b is provided on the frame side. .

As shown in FIG. 7, the slit plate 8 includes a number of timing slits S _T for detecting the position of the linear shuttle 2 to obtain synchronous timing for constant velocity driving, and left and right ends of the constant velocity region. It has edge slits S _L and S _R for detecting (that is, the boundary between the constant velocity region and the inversion region). The position sensor 9 detects the light passing through these slits. That is, the linear shuttle 2 outputs a position detection signal the position sensor 9 detects the timing slit S _T and moves, the position sensor 9 in the boundary between the constant-velocity region and the inversion region linear shuttle 2 passes the edge An edge signal is output by detecting the slit S _L or S _R.

Next, the operation of the linear shuttle 2 in the linear shuttle type printer having such a configuration will be described. FIG. 8 is an explanatory diagram showing the operation of the linear shuttle 2 over time. 9 is a timing chart showing the detection result of the position sensor 9 as a control signal of the linear shuttle 2. FIG. 9A shows an edge signal, and FIG.
(B) shows position detection signals, respectively.

First, when the linear shuttle 2 is started, the linear shuttle 2 is pressed against one (left) damper 4 and then the polarity of the drive current of the linear motor 3 is reversed to move the linear shuttle 2 to the damper 4. Drive in the direction away from (in FIG. 8). Then, the position sensor 9 detects the left edge slits S _L, and outputs an edge signal SL2. In synchronization with the edge signal SL2 output from the position sensor 9, the drive current of the linear motor 3 is controlled, and the linear shuttle 2 is advanced at a constant speed toward the other (right) damper 4 in the constant velocity region. (Of FIG. 8).

When the linear shuttle 2 passes through the boundary between the constant velocity region and the right reversal region, the position sensor 9 detects the right edge slit S _R and outputs the edge signal SR1. In synchronism with the edge signal SR1 output from the position sensor 9, the polarity of the drive current of the linear motor 3 is reversed to change from constant speed driving to reverse driving. Then, the linear shuttle 2 is decelerated in the reversal region, and moves to the opposite direction (toward the damper 4 on the left side) after the speed reaches zero (in FIG. 8).

Then, when the linear shuttle 2 again passes through the boundary between the constant velocity region and the reversal region on the right side, the position sensor 9 detects the edge slit S _R again, and the edge signal SR
2 is output. The drive current of the linear motor 3 is controlled in synchronization with the edge signal SR2 output from the position sensor 9, and the linear shuttle 2 is advanced at a constant speed toward the damper 4 on the left side in the constant velocity region (FIG. 8). of).

[0011] When the linear shuttle 2 passes a boundary between the constant velocity region and the left inversion region, the position sensor 9 detects the left edge slits S _L, and outputs an edge signal SL1. In synchronism with the edge signal SL1 output from the position sensor 9, the polarity of the drive current of the linear motor 3 is reversed to change from constant speed driving to reverse driving. Then, the linear shuttle 2 is decelerated in the reversal region, and moves in the opposite direction (toward the damper 4 on the right side) after the speed reaches zero (in FIG. 8).

While the linear shuttle 2 is moving at a constant speed or until the speed of the linear shuttle 2 during reversal becomes zero, the next shuttle operation command (for example, the linear shuttle 2) is sent from a host device (not shown). In the model printer, if the next print command is continuously input, the above-described constant speed movement and reverse movement of the linear shuttle 2 are repeated.
Then, in the linear shuttle type printer, when the linear shuttle 2 moves at a constant speed, the print head 1 prints on the paper inserted between the print head 1 and the platen.

By the way, when the next shuttle operation command is not input in the above period, the reversing drive is temporarily stopped when the speed of the linear shuttle 2 becomes zero in the reversing region, and from there, for a certain period of time. The pressing control is performed by moving the linear shuttle 2 to the outer end of the reversal region and pressing it against the damper 4 (FIG. 8).

When the next shuttle operation command is input from the host device during this pressing control, the reverse drive is restarted and the linear shuttle 2 is moved toward the constant velocity region. FIG. 10 is a flowchart showing an operation procedure during conventional pressing control. When the next shuttle operation command is input during the pressing control (step S51: YES), the restart is started (step S52). Then, it is determined whether or not the position detection signal is detected 120 times or more (step S53). If not detected (S53: NO), it is determined whether or not an edge signal (constant velocity region start signal) is detected (step S54). When the constant velocity region start signal is detected (S54: YES), it is determined whether or not the position detection signal is detected twice or more (step S55). When the position detection signal is detected twice or more (S55: YES), the constant speed control of the linear shuttle 2 is started (step S56). When the constant velocity region start signal is not detected (S54: NO) and when the position detection signal is not detected twice or more (S55: NO), the process is S53.
Return to. If the position detection signal is detected 120 times or more (S53: YES), an error signal is output (step S
57).

[0015]

In such pressing control, detecting the constant velocity region start signal immediately after the next shuttle operation command is input and the restart is started is to detect the constant speed region during the pressing control. This is abnormal, judging from the mechanical position of the linear shuttle 2. Further, in such a case, since the number of times of detecting the position detection signal is small when the constant velocity region start signal is detected, conventionally, the constant velocity region start signal detected immediately after restart is an invalid signal such as noise. Is considered. That is, in the flowchart of FIG. 10, even if the constant velocity region start signal is detected (S54: YES), but the position detection signal is not detected more than twice (S55: NO), the constant velocity control is not started. .

If the detected signal is really an invalid signal such as noise, a true valid constant velocity region start signal is detected when the control operation is continued, so that there is no problem. However, as the reciprocating operation of the linear shuttle 2 continues, the electromagnetic coil of the linear motor 3 heats up and the coil thrust on the linear shuttle 2 decreases, and the linear shuttle 2 collides with the damper 4 and bounces before the speed reaches zero. In that case, the restart is performed from a state where the damper 4 is not sufficiently pressed, and it is conceivable that the constant velocity region start signal is detected immediately after the restart is started. Such a thing also occurs due to an error in the length of the left and right reversal regions due to an attachment error of the linear shuttle 2 or the damper 4, variations in the gap between the linear shuttle 2 and the electromagnetic coil, and the like.

Therefore, in the conventional control method, the true constant velocity region start signal may be regarded as an invalid signal such as noise. Since this is regarded as an invalid signal and control is continued, a shuttle operation error occurs. Occurs. That is, in the flow chart of FIG. 10, when the true constant velocity region start signal is overlooked as an invalid signal such as noise because it is immediately after the restart (S55: NO), the constant velocity region start signal is then changed. Since no detection is performed, the process repeats the routines of S53 and S54, and the number of detections of the position detection signal exceeds 120 times while the linear shuttle 2 moves in the constant velocity region (S5
3: YES), a shuttle operation error occurs (S57). Due to the occurrence of such a shuttle operation error, there is a problem that, for example, the operating rate of the linear shuttle printer is reduced.

The present invention has been made in view of such circumstances, and when a constant velocity region start signal is detected immediately after the restart is started, the signal is used as a valid signal to continue the control operation, or A linear shuttle drive control method and a linear shuttle drive device capable of preventing a shuttle operation error and preventing a reduction in the operating rate of a device using a linear shuttle by performing retry control in which the signal is made an invalid signal and the control operation is performed again from the beginning. The purpose is to provide.

Another object of the present invention is to provide a linear shuttle type printer which can prevent a decrease in operating rate due to an error by controlling the drive of the linear shuttle as described above.

[0020]

A linear shuttle drive control method according to a first aspect of the present invention is a linear shuttle drive control method according to a start signal for starting a constant speed movement in a predetermined constant speed area. It moves at a high speed, reverses in the reversal regions on both sides of the constant velocity region, temporarily stops the reversal operation in the reversal region, pushes the buffer member outside the reversal region, and restarts the reversal action in the reversal region. In the method of driving and controlling the linear shuttle, the start signal of the constant velocity area after the restart is started.
Signal, and detecting the start signal in the constant velocity region.
Judge whether the exit timing is immediately after restart start
Step and detection timing of the start signal of the constant velocity region
When it is determined that the
Incrementing the value and the value of the counter
Is less than the specified value, the linear shuttle is operated at a constant speed.
If the counter value is greater than or equal to the specified value
Has a step of stopping the linear shuttle .

In the linear shuttle drive control method according to a second aspect of the present invention, the linear shuttle moves at a constant velocity in the constant velocity region in response to a start signal for starting the constant velocity movement in a predetermined constant velocity region. The linear shuttle is turned so as to invert in both inversion regions on both outer sides of the speed region, temporarily stop the inversion action in the inversion region, press the buffer member outside the inversion region, and restart the inversion action in the inversion region. In the drive control method, the step of detecting the start signal in the constant velocity area after restart is started.
And the detection timing of the start signal in the constant velocity area is reset.
A step of determining whether or not it has just been started,
The detection timing of the start signal in the constant velocity area is immediately after the restart is started.
If it is determined that the detected start signal is invalid, the linear shuttle is returned to the restart start position of the inversion operation in the inversion region.

A linear shuttle drive control method according to a third aspect of the present invention is the linear shuttle drive control method according to the second aspect , wherein the start signal of the constant velocity region is detected.
When it is determined that the exit timing is immediately after the restart is started
The step of incrementing the counter value, and
When the value of the counter is equal to or greater than a predetermined value, the step of stopping the linear shuttle is further included.

According to a fourth aspect of the present invention, there is provided a linear shuttle driving device, wherein first driving means for moving the linear shuttle at a constant speed in a predetermined constant speed region and reverse rotation of the linear shuttle in a reversing region outside the constant speed region. Second drive means, detection means for detecting a boundary marker indicating the boundary between the constant velocity area and the reversal area, and a buffer member provided on both outer sides of the reversal area for buffering the movement of the linear shuttle. When,
In the shuttle drive system including a third drive means for pressing said linear shuttle to the buffer member temporarily stops the reversal operation in the inversion region, before by the detecting means
Is the detection timing of the boundary indicator immediately after the restart is started?
A determination means for determining whether or not the start signal of the constant velocity region
The determination means that the detection timing is immediately after the restart is started.
And the counter that is incremented if
If the counter value is less than the specified value, the linear
Move the shuttle at a constant speed so that the counter value is less than the specified value.
Control to stop the linear shuttle if above
And means .

According to a fifth aspect of the present invention, there is provided a linear shuttle driving device, wherein first driving means for moving the linear shuttle at a constant speed in a predetermined constant speed region and the linear shuttle in a reverse region on both outer sides of the constant speed region. Second drive means, detection means for detecting a boundary marker indicating the boundary between the constant velocity area and the reversal area, and a buffer member provided on both outer sides of the reversal area for buffering the movement of the linear shuttle. When,
In the shuttle drive system including a third drive means for pressing said linear shuttle to the buffer member temporarily stops the reversal operation in the inversion region, before by the detecting means
Is the detection timing of the boundary indicator immediately after the restart is started?
A determination means for determining whether or not the start signal of the constant velocity region
The determination means that the detection timing is immediately after the restart is started.
When the determination is made, the control means for invalidating the detected start signal and returning the linear shuttle to the restart start position of the reversing operation in the reversing region is provided .

A linear shuttle drive device according to a sixth aspect of the present invention is the linear shuttle drive device according to the fifth aspect , wherein the start signal of the constant velocity region is detected.
The judgment means determines that the timing is immediately after the start of the restart.
Further equipped with a counter that increments when turned off
If the counter value is greater than or equal to a predetermined value, then
Control means characterized by being configured to make stop the linear shuttle.

A linear shuttle type printer according to a seventh aspect of the present invention is a linear shuttle, a first driving means for moving the linear shuttle at a constant speed in a predetermined constant speed region, and the linear shuttle on both outer sides of the constant speed region. Second drive means for reversing in the reversing area, detection means for detecting a boundary marker indicating the boundary between the constant velocity area and the reversing area, and a movement of the linear shuttle provided on both outer sides of the reversing area. And a third driving means for temporarily stopping the reversing operation in the reversing region and pressing the linear shuttle against the buffer member, and the linear shuttle is mounted on the linear shuttle, and the linear shuttle is provided in the constant velocity region. In a linear shuttle type printer having a print head for performing a printing process while moving the
Judge whether the detection timing is immediately after the start of restart
Determination means for detecting the start signal of the constant velocity region
If the determination means determines that the
Counter that is incremented when
If the value is less than the specified value, use the linear shuttle etc.
When moving at high speed and the value of the counter is more than a predetermined value
And a control means for stopping the linear shuttle.
Characterized in that that.

A linear shuttle type printer according to an eighth aspect of the present invention is a linear shuttle, a first driving means for moving the linear shuttle at a constant speed in a predetermined constant speed area, and the linear shuttle on both outer sides of the constant speed area. Second drive means for reversing in the reversing area, detection means for detecting a boundary marker indicating the boundary between the constant velocity area and the reversing area, and a movement of the linear shuttle provided on both outer sides of the reversing area. And a third driving means for temporarily stopping the reversing operation in the reversing region and pressing the linear shuttle against the buffer member, and the linear shuttle is mounted on the linear shuttle, and the linear shuttle is provided in the constant velocity region. In a linear shuttle type printer having a print head for performing a printing process while moving the
Judge whether the detection timing is immediately after the start of restart
Determination means for detecting the start signal of the constant velocity region
If the determination means determines that the
In this case, a control means for invalidating the detected start signal and returning the linear shuttle to the restart start position of the reversing operation in the reversing region is provided .

A linear shuttle type printer according to a ninth aspect is the printer according to the eighth aspect , wherein the start signal of the constant velocity region is detected.
The judgment means determines that the timing is immediately after the start of the restart.
Further equipped with a counter that increments when turned off
For example, when the value of the counter is the predetermined value or more, the
The control means is configured to stop the printing process by the print head.

According to the first aspect of the present invention, when the next shuttle operation command is input and the restart is started while the linear shuttle is being pressed and controlled, the detected constant velocity is detected even immediately after the restart is started. The start signal of the area is validated and the subsequent drive control operation is continued. Therefore, even when the pressing control is defective, the start signal of the true constant velocity region is not regarded as an invalid signal such as noise, and the decrease in the operating rate of the device due to the error is prevented.

In the second invention, when the next shuttle operation command is input and the restart is started while the linear shuttle is being pressed and controlled, the start signal of the constant velocity region is detected immediately after the restart is started. In that case, the detection signal is invalidated, and the linear shuttle drive control operation is performed again. Therefore, when the start signal in the constant velocity region is detected immediately after the restart is started, it is not considered as noise and the driving process is not stopped as an error unlike the conventional case, so that the reduction of the operating rate of the device due to the error is prevented. .

However, in the first invention and / or the second invention, in the case where the start signal in the constant velocity region is detected immediately after the restart is repeated many times, the linear shuttle has a mechanical problem. Since it is considered that there is a shuttle error, the drive control is stopped as a shuttle error.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings showing the embodiments thereof. FIG. 1 is a configuration diagram of a linear shuttle type printer which is an embodiment of the present invention.

The linear shuttle printer of the present invention drives the linear shuttle 2 equipped with the print head 1 and the linear shuttle 2 at a constant speed in a predetermined constant speed region, and in the reversal regions on both outer sides of the constant speed region. The shuttle drive means 5 for inversion driving and a pair of dampers 4 as buffer members for buffering the movement of the linear shuttle 2 at each outer edge of the inversion region are provided. The shuttle drive means 5 switches ON / OFF of the linear motor 3 and the drive current of the linear motor 3,
It has a driver 6 for switching the polarity of the drive current, and a driver control section 7 for controlling the driver 6. As shown in FIG. 4, the linear motor 3 includes a permanent magnet 32a as a first drive means and a third drive means for constant velocity drive.
It is composed of an electromagnetic coil 33a for constant speed driving, a permanent magnet 32b for reverse driving as a second driving means, and an electromagnetic coil 33b for reverse driving.

The linear shuttle 2 is provided with a slit plate 8 for detecting its position. Slit plate 8
7, a number of timing slits S _T for detecting the position of the linear shuttle 2 and edge slits S _L and S _L for detecting the left and right ends of the constant velocity region are shown in FIG.
_{With R} and. A position sensor 9 for detecting light passing through these slits is provided on the frame side. And the position sensor 9 is the linear shuttle 2
Along with the movement of the print control unit 10, an edge signal as shown in FIG. 9A and a position detection signal as shown in FIG.
It is designed to output to. The slit plate 8 and the position sensor 9 constitute a detecting means for detecting the constant velocity region start signal.

The print control unit 10 controls the overall operation of the printer, and a print command is input from the host device 11. The print control unit 10 controls the printing process of the print head 1 based on the print command and sends a control signal for driving the linear shuttle 2 to the driver control unit 7. The print control unit 10 also includes a ROM 10a for storing an operation program, which will be described later, a work RAM 10b, and a counter 10c for counting the number of detections of an edge signal (constant velocity region start signal) immediately after restarting.

Further, a selection input device 12 for accepting a user's selection input from the outside, which is composed of, for example, an operator panel and a DIP switch, is connected to the higher-level device 11, and two control operation programs to be described later are provided. Which one is selected can be determined through the selection input device 12.

Next, the operation will be described. The basic printing operation is the same as the conventional example. First, at the start of startup, after the linear shuttle 2 is pressed against the damper 4 on the left side, the driver 6 drives the linear motor 3 (electromagnetic coil).
33b) The polarity of the drive current is reversed and the linear shuttle 2
Is driven in the direction away from the damper 4 (in FIG. 8). Then, in synchronism with the timing at which the position sensor 9 detects the left edge slits S _L, and controls the driving current of the linear motor 3 (electromagnetic coil 33a) by the driver 6, a constant speed region a linear shuttle 2 at a constant speed To the damper 4 on the right side (see FIG. 8). The print processing is performed by the print head 1 during this constant speed movement.

The driver 6 linearly drives the linear motor 3 (electromagnetic coil) in synchronization with the timing when the linear shuttle 2 passes through the boundary between the constant velocity region and the right reversal region and the position sensor 9 detects the right edge slit S _R. The polarity of the drive current in 33b) is reversed to change from constant speed driving to reverse driving.
The linear shuttle 2 is decelerated in the reversing area, and moves toward the damper 4 on the left side (in FIG. 8) after the speed reaches zero.

Then, in synchronization with the timing when the linear shuttle 2 again passes through the boundary between the constant velocity region and the right-side reversal region and the position sensor 9 detects the edge slit S _R again, the driver 6 drives the linear motor 3 ( (Electromagnetic coil 33a)
The drive current of the linear shuttle 2 is controlled to move the linear shuttle 2 at a constant speed toward the damper 4 on the left side in the constant velocity region (see FIG. 8).
of). The print processing is performed by the print head 1 during this constant speed movement.

[0040] The linear shuttle 2 is in synchronism with the timing when the position sensor 8 passes through the boundary between the constant-velocity region and left inversion region detects the left edge slits S _L, the linear motor 3 by the driver 6 (electromagnetic coil The polarity of the drive current in 33b) is reversed to change from constant speed driving to reverse driving.
Then, the linear shuttle 2 is decelerated in the reversal region and moves toward the damper 4 on the right side after the speed reaches zero (in FIG. 8).

While the linear shuttle 2 is moving at a constant speed or until the speed of the linear shuttle 2 which is being reversed becomes zero, if the next print command is continuously input from the host device 11 to the print control unit 10. , The above linear shuttle 2
The constant velocity movement and the reverse movement are repeated, and at the time of the constant velocity movement, the print processing is performed by the print head 1 on the sheet inserted between the print head 1 and the platen.

When the transfer of print data is delayed or the number of lines of paper feed is large, while the linear shuttle 2 is moving at a constant speed or until the speed of the linear shuttle 2 which is being reversed reaches zero. The next print command may not be input from the higher-level device 11 to the print control unit 10. In such a case, the reversing drive is temporarily stopped when the speed of the linear shuttle 2 becomes zero, and then the linear shuttle 2 is moved to the outer end of the reversing region for a certain period of time and pressed against the damper 4. Control (of FIG. 8). In this pressing control, if the linear motor 3 (electromagnetic coil 33a) is pressed to the right side, a current having a pulse waveform is passed in the right direction, and if it is pressed to the left side, a current having a pulse waveform is applied to press the pulsing control. When the next print command is input to the print control unit 10 from the host device 11 during the pressing control, the reversal drive is restarted at the end of the pressing control for a predetermined time, and the linear shuttle 2 is directed to the constant velocity region. And move it to perform the next printing process.

Next, the operation of pressing control, which is a characteristic part of the present invention, will be described. Note that the pressing control operation of the present invention is performed in two examples (first embodiment in which the detected edge signal (constant velocity region start signal) is valid even immediately after the restart is started and the control operation is continued (first embodiment). 1) and the edge signal (constant velocity region start signal) detected immediately after the start of restarting is invalidated and the control operation is restarted.

(First Embodiment) FIG. 2 is a flow chart showing an operation procedure during the pressing control according to the first embodiment. When the next print command is input during the pressing control (step S1: YES), the restart is started (step S2). Then, it is determined whether or not the position detection signal is detected 120 times or more (step S3). If not detected (S3: NO), it is determined whether or not an edge signal (constant velocity region start signal) is detected (step S4).

When the constant velocity region start signal is detected (S
4: YES), and it is determined whether or not the position detection signal is detected twice or more (step S5). When the position detection signal is detected twice or more (S5: YES), it is considered that the reverse driving is performed from the normal pressing position, so the count value of the counter 10c is cleared (step S6) and the linear shuttle 2 Constant speed control is started (step S7).

When the position detection signal is not detected more than twice (S5: NO), it is determined whether or not the detection signal is the constant velocity region start signal after the restart is started (step S).
8). If it is a constant velocity region start signal (S8: YES),
The count value of the counter 10c is incremented by 1 (step S9). Then, it is determined whether the incremented count value is equal to or greater than a preset predetermined value (step S10). If it is less than (S10: NO),
Start the constant speed control of the linear shuttle 2 (step S
7).

When the constant velocity region start signal is not detected (S
4: NO) and if the detection signal is not the constant velocity region start signal after the restart is started (S8: NO), the process returns to S3. When the position detection signal is detected 120 times or more without detecting the constant velocity region start signal after restart is started (S3: YE
S), and, when the count value of the counter 10c becomes equal to or greater than a predetermined value (S 10: YES), the CPU stops the printing process by outputting an error signal (step S11).

As described above, in the first embodiment, even if the detection timing of the constant velocity region start signal is immediately after the restart is started (the number of detections of the position detection signal is less than 2 times), the restart is started. After that, the signal is validated and constant speed control is performed. Therefore, unlike the conventional example, the printing operation is not stopped and the operation rate does not decrease. However, the fact that the state in which the constant velocity region start signal is detected immediately after the restart is continued many times means that the position of the linear shuttle 2 during the pressing control is mechanically abnormal. It is an error to maintain high print quality.

(Second Embodiment) FIG. 3 is a flow chart showing an operation procedure during pressing control according to the second embodiment. When the next print command is input during the pressing control (step S21: YES), the restart is started (step S22). Then, it is determined whether or not the position detection signal is detected 120 times or more (step S23). If not detected (S23: NO), it is determined whether or not an edge signal (constant velocity region start signal) is detected (step S24).

When it is detected (S24: YES), it is judged whether or not the position detection signal is detected twice or more (step S).
twenty five). When the position detection signal is detected more than once (S2
5: YES), since it is considered that the reverse driving was performed from the normal pressing position, the count value of the counter 10c is cleared (step S26) and the constant speed control of the linear shuttle 2 is started (step S27).

When the position detection signal is not detected more than twice (S25: NO), it is judged whether or not the detection signal is the constant velocity region start signal after the restart is started (step S2).
8). If it is a constant velocity region start signal (S28: YES),
The count value of the counter 10c is incremented by 1 (step S29). Then, it is determined whether the incremented count value is equal to or greater than a preset predetermined value (step S30). If it is less than (S30: NO),
The retry control is started by turning off the power of the electromagnetic coil to return the linear shuttle 2 to the control start position and restarting the control operation from the beginning (S31). The retry control may be started from the control start position in this way, or may be restarted from the control process in the middle.

When the constant velocity region start signal is not detected (S2
4: NO) and if the detection signal is not the constant velocity region start signal after the restart is started (S28: NO), the process returns to S23. When the position detection signal is detected 120 times or more without detecting the constant velocity region start signal after the restart is started (S23: YE
S), and, when the count value of the counter 10c becomes equal to or larger than a predetermined value (S 30: YES), the CPU stops the printing process by outputting an error signal (step S32).

As described above, in the second embodiment, when the detection timing of the constant velocity region start signal is immediately after the restart is started (the number of detections of the position detection signal is less than 2), the restart is started. After that, the signal is invalidated and retry control is performed. Therefore, unlike the conventional example, the printing operation is not stopped and the operation rate does not decrease. However, the state in which the constant velocity region start signal is detected immediately after the start of restarting continues for a number of times, which means that the linear shuttle 2 during push control is
Since it means that the position of is abnormal mechanically, it is an error for the purpose of maintaining high print quality.

By the way, which operation control program of the above-described first or second embodiment is to be adopted can be arbitrarily determined through the selection input device 12 (operator panel, dip switch, etc.). If you want to maintain the print speed even if you ignore the print quality a little, you can select the operation control program of the first embodiment that makes all the constant velocity area start signals after restarting valid. When it is desired to maintain high print quality even if the speed is slightly slowed down, the operation control program of the second embodiment which performs retry control when the constant speed region start signal is detected immediately after the restart is selected. .

Although the linear shuttle type printer has been described as an example, the linear shuttle drive control method according to the present invention is not limited to the printer, and may be a linear shuttle such as a constant speed movement control, a reverse movement control and a pressing control. Of course, it can be applied to all the devices that have it.

[0056]

As described above, according to the present invention, even in the case of improper pressing which may occur due to the variation of the devices between the devices, the correct correction control is performed before the error occurs. It is possible to make the printing speed and the printing quality in the printer constant between the apparatuses, and it is possible to prevent a decrease in the operating rate due to the occurrence of an error.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a linear shuttle type printer of the present invention.

FIG. 2 is a flowchart showing an operation procedure at the time of waiting for pressing in the first embodiment.

FIG. 3 is a flowchart showing an operation procedure at the time of pressing standby in the second embodiment.

FIG. 4 is a perspective view of a main part of a linear shuttle type printer.

FIG. 5 is a schematic diagram of a main part of a linear shuttle type printer.

FIG. 6 is a plan view of a main part of a linear shuttle type printer.

FIG. 7 is a plan view of a slit plate provided on the linear shuttle.

FIG. 8 is an explanatory diagram showing the operation of the linear shuttle over time.

FIG. 9 is a timing chart showing an edge signal and a position detection signal of the linear shuttle.

FIG. 10 is a flowchart showing an operation procedure in a pressing standby state in a conventional example.

[Explanation of symbols]

1 print head 2 linear shuttle 3 linear motor 4 damper 5 shuttle driving means 6 driver 7 driver control unit 8 slit plate S _T timing slits S _L , S _R edge slit 9 position sensor 10 printing control unit 10c counter 11 host device 12 selection input Unit 32a, 32b Permanent magnet 33a, 33b Electromagnetic coil

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41J 2/245 B41J 2/515 B41J 19/18

Claims (9)

(57) [Claims] 1. A linear shuttle moves at a constant velocity in the constant velocity region in response to a start signal for starting the constant velocity movement in a predetermined constant velocity region, and reverses in a reversal region on both outer sides of the constant velocity region. Then, in the method of driving and controlling the linear shuttle so that the reversing operation is temporarily stopped in the reversing area, the cushioning member outside the reversing area is pushed, and the reversing operation is restarted in the reversing area, after the restart is started. Detects the start signal in the constant velocity area of
And the detection timing of the start signal of the constant velocity region.
To determine whether or not the restarting has just started
And the detection timing of the start signal in the constant velocity region is restarted.
If it is determined that the counter has just started, the counter value is
Decrement step and the counter value is a predetermined value
If it is less than, the linear shuttle is moved at a constant speed.
If the counter value is greater than or equal to a predetermined value, then
And a step of stopping the linear shuttle. 2. A linear shuttle moves at a constant velocity in the constant velocity region in response to a start signal for starting the constant velocity movement in a predetermined constant velocity region, and reverses in a reversal region on both outer sides of the constant velocity region. Then, in the method of driving and controlling the linear shuttle so that the reversing operation is temporarily stopped in the reversing area, the cushioning member outside the reversing area is pushed, and the reversing operation is restarted in the reversing area, after the restart is started. Detects the start signal in the constant velocity area of
And the detection timing of the start signal of the constant velocity region.
To determine whether or not the restarting has just started
And the detection timing of the start signal in the constant velocity region is restarted.
When it is determined that it is just after the start , the detected start signal is invalidated and the linear shuttle is returned to the restart start position of the reversing operation in the reversing region. . 3. Detecting a start signal of the constant velocity region
Counter when it determines that the
Incrementing the value of
The linear shuttle drive control method according to claim 2 , further comprising: stopping the linear shuttle when the value is equal to or larger than a predetermined value . 4. A first drive means for moving the linear shuttle at a constant speed in a predetermined constant speed area, a second drive means for reversing the linear shuttle in inversion areas on both outer sides of the constant speed area, and the constant speed. A detection unit that detects a boundary marker that indicates the boundary between the region and the reversal region, a buffer member that is provided on both outer sides of the reversal region and buffers the movement of the linear shuttle, and a reversing operation in the reversal region. once the shuttle drive system including a third drive means for pressing said linear shuttle to the buffer member is stopped, said detection means
Immediately after the restart of the detection timing of the boundary marker by
And the opening of the constant velocity region.
If the detection timing of the start signal is immediately after the restart is started,
Count that is incremented when the judgment means judges
If the counter value is less than the specified value,
Move the linear shuttle at a constant speed and
If it is more than a predetermined value, stop the linear shuttle.
A linear shuttle drive device, comprising: 5. A first driving means for moving the linear shuttle at a constant speed in a predetermined constant speed area, a second driving means for reversing the linear shuttle in an inversion area on both outer sides of the constant speed area, and the constant speed. A detection unit that detects a boundary marker that represents a boundary between the region and the reversal region, a buffer member that is provided on both outer sides of the reversal region and buffers the movement of the linear shuttle, and a reversing operation in the reversal region. once the shuttle drive system including a third drive means for pressing said linear shuttle to the buffer member is stopped, said detection means
Immediately after the restart of the detection timing of the boundary marker by
And the opening of the constant velocity region.
If the detection timing of the start signal is immediately after the restart is started,
A linear shuttle drive device comprising: a control means for invalidating the detected start signal and returning the linear shuttle to the restart start position of the reversing operation in the reversing region when the judgment means judges . 6. The detection of the start signal of the constant velocity region
If the determination means determines that the
A counter that is incremented when
If the value of the counter is a predetermined value or more, according to claim wherein said control means is configured to make stops <br/> the linear shuttle
5. The linear shuttle drive device described in item 5 . 7. A linear shuttle, a first driving means for moving the linear shuttle at a constant velocity region in a constant velocity region, and a second driving means for reversing the linear shuttle in a reversal region on both outer sides of the constant velocity region. A detecting means for detecting a boundary marker representing a boundary between the constant velocity region and the reversing region, a buffer member provided on both outer sides of the reversing region for buffering the movement of the linear shuttle, and the reversing device. Third driving means for temporarily stopping the reversing operation in the area and pressing the linear shuttle against the buffer member, and the linear shuttle, which is mounted on the linear shuttle, performs printing processing while the linear shuttle moves in the constant velocity area. In a linear shuttle type printer having a print head, the boundary by the detecting means is
Whether the detection timing of the field marker is immediately after the restart is started
And a detection means for determining the start signal in the constant velocity region
The judgment means determines that the timing is immediately after the start of the restart.
If the counter is incremented, the counter and
If the counter value is less than the specified value, the linear
Move the tor at a constant speed, and if the counter value is greater than or equal to the specified value,
Control means for stopping the linear shuttle in some cases
And a linear shuttle type printer. 8. A linear shuttle, a first driving means for moving the linear shuttle at a constant velocity region in a constant velocity region, and a second driving device for reversing the linear shuttle in a reversal region on both outer sides of the constant velocity region. A detecting means for detecting a boundary marker representing a boundary between the constant velocity region and the reversing region, a buffer member provided on both outer sides of the reversing region for buffering the movement of the linear shuttle, and the reversing device. Third driving means for temporarily stopping the reversing operation in the area and pressing the linear shuttle against the buffer member, and the linear shuttle, which is mounted on the linear shuttle, performs printing processing while the linear shuttle moves in the constant velocity area. In a linear shuttle type printer having a print head, the boundary by the detecting means is
Whether the detection timing of the field marker is immediately after the restart is started
And a detection means for determining the start signal in the constant velocity region
The judgment means determines that the timing is immediately after the start of the restart.
A linear shuttle type printer, comprising: a control means for invalidating the detected start signal and returning the linear shuttle to the restart start position of the reversing operation in the reversing region when the disconnection is made . 9. The detection of the start signal in the constant velocity region
If the determination means determines that the
A counter that is incremented when
9. The linear shuttle type printer according to claim 8 , wherein the control means stops the printing process by the print head when the value of the printer is a predetermined value or more .