JP7069985B2 - Transport control device - Google Patents

Description

The present invention relates to a transfer control device.

In Patent Document 1, when the carriage equipped with the recording head of the image forming apparatus is stopped at the target position, the carriage is moved toward the target position by feedback control, and the difference between the target position and the current position is the first error amount. When entering, the feedback loop is interrupted and the carriage motor is forcibly stopped, and if the difference between this stop position and the target position is within the second error amount smaller than the first error amount, the present If it is determined that the stop position of is the target position and it is not within the second error amount, after resetting the predetermined control variable of the feedback control, the carriage is moved toward the target position again by the feedback control. A control method is described in which the feedback loop is interrupted and the carriage motor is forcibly stopped when the difference between the target position and the current position falls within the second error amount.

In Patent Document 2, the actual paper transfer amount is measured by detecting the position of the weight placed on the paper before and after the paper is conveyed by the motor, and the measured actual paper transfer amount is the paper transfer amount. A device that performs paper transfer control again in order to correct the deviation from the optimum value is described.

Patent Document 3 describes a process of increasing the drive amount of the transfer roller at the time of executing the deflection forming process so that the sheet is not bent when the sheet is no longer formed between the transfer roller and the resist roller. Is described.

Japanese Patent Application Laid-Open No. 2003-191560 Japanese Unexamined Patent Publication No. 2011-068118 Japanese Unexamined Patent Publication No. 2013-129490

By the way, some motors that are a drive source for transportation require feedback control that corrects an error in the amount of transportation due to transportation.

An object of the present invention is to prevent the transfer amount from deviating from a target value as compared with the case where the error of the transfer amount corrected by the feedback control of the motor is not reset.

The invention according to claim 1 drives a first transport roller that transports a medium along a first transport path, and a feedback control that corrects an error in the transport amount due to the transport to drive the first transport roller. After resetting the error of the transport amount corrected by the feedback control according to the first motor and the medium passing through the predetermined position of the first transport path, the transport of the medium is controlled. The control unit, a second transport roller that branches from the first transport path and transports the medium along a second transport path connected to a path for inverting the front and back of the medium, and the feedback control are executed. It has a second motor for driving a second transport roller, and the control unit executes the reset process according to the passage of the medium through a predetermined position of the second transport path, and also performs the reset process. A transport control device characterized in that driving of the second transport roller by the second motor is stopped after a predetermined time after the medium passes through a predetermined position of the second transport path. be.

The invention according to claim 2 is the transfer control device according to claim 1, wherein the first motor starts driving the first transfer roller in response to control from the control unit, and the first transfer is performed. The transfer control device is characterized in that the feedback control is executed before the medium passes through the predetermined position of the path to drive the first transfer roller.

The invention according to claim 3 has a resist roller provided on the downstream side of a predetermined position of the first transport path in the transport control device according to claim 1 or 2, wherein the control unit has a resist roller . The reset process is executed according to the passage of the medium through the predetermined position of the first transport path, and the preset position is predetermined after the medium passes through the predetermined position of the first transport path. The transport control device is characterized in that the drive of the first transport roller by the first motor is stopped after a certain period of time.

The invention according to claim 4 is the transport control device according to claim 1 , wherein the control unit is described after a predetermined time after the medium passes through a predetermined position of the second transport path. After stopping the drive of the second transfer roller by the forward rotation of the second motor, the gate that opens and closes the connection path connecting the first transfer path and the second transfer path is controlled to control the connection. After closing the path, the second motor is rotated in the reverse direction to drive the second transport roller in the reverse direction, whereby the medium is transported to the path for turning over the front and back. It is a control device.

According to the first aspect of the present invention, it is possible to prevent the transfer amount from deviating from the target value as compared with the case where the error of the transfer amount corrected by the feedback control of the motor is not reset. In addition, the deviation of the inversion position of the medium from the target position becomes smaller than in the case where the error of the conveyed amount is not reset.

According to the second aspect of the present invention, the error of the conveyed amount accumulated until the medium reaches a predetermined position is reset.

According to the third aspect of the present invention, the deviation from the target value of the bending amount for bending the medium is smaller than that in the case where the error in the carrying amount is not reset.

According to the invention of claim 4 , the clogging of the medium by the gate is reduced as compared with the case where the error of the conveyed amount is not reset.

It is a figure which shows the specific example of a transfer control device. It is a figure which shows the specific example of the path which the transport control apparatus controls transport. It is a figure which shows the specific example of the transfer control of a loop creation. It is a figure which shows the control example of a switching gate. It is a figure which shows the specific example of the transfer control to an inversion position.

FIG. 1 is a diagram showing an example of a specific embodiment of the present invention, and FIG. 1 shows a specific example of the transfer control device 100. The transfer control device 100 of the specific example shown in FIG. 1 includes a transfer roller 10, a motor 20, and a control unit 30.

The transport roller 10 is a roller that transports the medium, and for example, one or more transport rollers 10 are provided in the path for transporting the medium. The transport roller 10 is driven by a motor 20. For example, one transport roller 10 is driven by one corresponding motor 20.

The motor 20 is a drive source for driving the transfer roller 10, and executes feedback control to drive the transfer roller 10. The motor 20 drives the transport roller 10 by executing, for example, feedback control for correcting an error in the transport amount due to the transport of the transport roller 10 using the motor 20 as a drive source. One of the specific examples of the motor 20 is a DC (direct current) brushless motor.

The control unit 30 is a controller that controls the transfer of the medium. For example, the control unit 30 outputs a control signal and a reset signal to the motor 20, and controls the transfer of the medium by controlling the drive of the transfer roller 10 by the motor 20. For example, the control signal controls the start of driving of the transport roller 10 by the motor 20, the rotation speed of the motor 20, the rotation direction of the motor 20, and the like. Further, for example, a reset signal resets the error of the transport amount corrected by the feedback control executed by the motor 20. Then, the control unit 30 controls the transport of the medium by using, for example, the detection result obtained from one or more path sensors PS provided in the path for transporting the medium.

The control unit 30 can be realized by using various arithmetic devices such as a CPU as a typical example. For example, the function of the control unit 30 may be realized by using a computer. That is, a program (software) corresponding to at least a part of the functions of the control unit 30 illustrated in FIG. 1 is loaded into the computer, and the hardware resources of the computer and the loaded software cooperate with each other to load the control unit. At least some of the functions of 30 may be realized by a computer. The program may be provided to a computer (control unit 30) via a communication line such as the Internet, or may be stored in a storage medium such as an optical disk or a semiconductor memory and provided to the computer (control unit 30). May be good.

FIG. 2 is a diagram showing a specific example of a route in which the transport control device 100 of FIG. 1 controls transport. FIG. 2 shows, for example, a specific example of a path provided in an image forming apparatus that executes a printing process on paper as a medium. The specific example routes shown in FIG. 2 include a transport path R1, a transport path R2, and a transport path R3.

The transport path R1 transports the paper obtained from the upstream side of the first transport roller 11 (for example, a paper storage tray) to the transfer section and the fixing section, and the paper processed by the transfer section and the fixing section is downstream of the discharge roller 16. It is a route to discharge to the side. The first transport roller 11, which is one of the transport rollers 10 (FIG. 1), transports the paper along the transport path R1. The path sensor PS1 is a sensor that detects that the paper conveyed by the first transfer roller 11 passes through a predetermined position P1 on the transfer path R1. Further, a resist roller 14 is provided on the downstream side of the position P1 on the transport path R1, for example, in the vicinity of the downstream side of the path sensor PS1.

The transport path R2 is a path for retracting the paper transported from the transport path R1 when double-sided printing is performed on the paper. The second transport roller 12, which is one of the transport rollers 10 (FIG. 1), transports the paper along the transport path R2. The path sensor PS2 is a sensor that detects that the paper conveyed by the second transfer roller 12 passes through a predetermined position P2 on the transfer path R2. The paper conveyed to the transfer path R2 may be further conveyed by the discharge roller 18 and discharged.

The transport path R3 is a path for transporting the paper obtained from the transport path R2, inverting the front and back of the paper, and returning the paper to the transport path R1 when double-sided printing is performed on the paper. For example, the paper whose surface has been printed by the fixing unit and the transfer unit is transported from the transport path R1 to the transport path R2, and further transported from the transport path R2 to the transport path R3, so that the front and back sides are reversed. It is returned to the transport path R1. The transport path R3 is connected to the transport path R1 on the upstream side of the predetermined position P1 on the transport path R1, for example, on the upstream side of the path sensor PS1.

In the specific example shown in FIG. 2, the connection path connecting the transfer path R1 and the transfer path R2 is provided with a switching gate 40 for opening and closing the connection path. In the state where the switching gate 40 closes the connection path (the state shown by the solid line in FIG. 2), the paper conveyed from the fixing portion to the downstream side along the transfer path R1 is directly transferred to the discharge roller 16 along the transfer path R1. It is transported toward. On the other hand, in the state where the switching gate 40 opens the connection path (the state shown by the broken line in FIG. 2), the paper conveyed from the fixing portion to the downstream side along the transfer path R1 becomes the connection path by the switching gate 40. It is guided and transported to the transport path R2 via the connection path.

The transport control device 100 of FIG. 1 controls the transport of paper as a medium in the route of the specific example shown in FIG. Among the controls, the transfer control device 100 of FIG. 1 executes a transfer control for creating a loop for bending the paper and a transfer control for inverting the front and back of the paper. Therefore, the transport control for creating a loop and the transport control for inverting the front and back, which are executed by the transport control device 100 of FIG. 1, will be described below. For the configurations (parts) shown in FIGS. 1 and 2, the reference numerals of FIGS. 1 and 2 are used in the following description.

FIG. 3 is a diagram showing a specific example of transport control for creating a loop. For example, in the image forming apparatus provided with the conveying path of FIG. 2, the paper is abutted against the resist roller 14 before the image forming processing by the transfer portion and the fixing portion in order to correct the angle deviation of the paper caused in the conveying process. Loop creation is executed.

In the loop creation, the paper conveyed by the first transfer roller 11 is abutted against the resist roller 14, and the paper is further conveyed by the first transfer roller 11 while the rotation of the resist roller 14 is stopped. By abutting against the resist roller 14, the angle deviation of the paper is corrected, and the paper is bent. In this loop creation, the amount of bending according to the amount of transport after the tip of the paper (the end on the downstream side) hits the resist roller 14 is realized.

FIG. 3A is a diagram showing a time change of the motor speed of the motor 20 that drives the first transport roller 11. The vertical axis of FIG. 3A is the speed of the motor 20, and the horizontal axis is the time axis. Further, in the specific example shown in FIG. 3, the time t1 is the timing at which the paper conveyed by the first transfer roller 11 passes through the predetermined position P1 on the transfer path R1. The timing at which the paper passes through the position P1 is detected by the pass sensor PS1. Time t2 is the timing at which the tip of the paper that has passed the position P1 reaches the resist roller 14. Time t3 is the timing at which the driving of the first transport roller 11 by the motor 20 is stopped.

For example, a time change of the motor speed illustrated in FIG. 3A is created so that the amount of bending of the paper becomes a target value, and a control signal indicating the time change of the motor speed (for example, the motor speed at each time) is created. Is output from the control unit 30 to the motor 20 that drives the first transfer roller 11. In this way, the motor 20 drives the first transport roller 11 according to, for example, the time change of the motor speed illustrated in FIG. 3 (A).

Further, the motor 20 executes feedback control to drive the first transfer roller 11. The motor 20 executes, for example, feedback control for correcting a deviation (error) between a target transport amount (target transport amount) and an actual transport amount. The target transport amount can be calculated, for example, by an integral operation (integral operation with time as a variable) from the time change of the motor speed illustrated in FIG. 3 (A). Further, the control unit 30 may provide the motor 20 for driving the first transfer roller 11 with information regarding the target transfer amount.

FIG. 3B is a diagram showing a specific example of the targeted transport amount and the actual transport amount. The vertical axis of FIG. 3B is the amount of paper conveyed, and the horizontal axis is the time axis. FIG. 3B shows a specific example of the time change between the targeted transport amount (broken line) and the actual transport amount (solid line). For example, when the influence of the transport resistance generated in the process of transporting the paper causes a deviation in the transport amount, which is the difference between the target transport amount and the actual transport amount, as illustrated in FIG. 3 (B). There is.

For example, when the paper is conveyed with a deviation in the transfer amount illustrated in FIG. 3B and the pass sensor PS1 detects the timing at which the paper passes through the position P1, the actual transfer amount is smaller than the target transfer amount. , The timing of passage detected by the actual amount of transportation is delayed from the timing of passage scheduled by the target amount of transportation.

When it is found that the timing at which the paper passes through the position P1 is delayed, the motor 20 executes the feedback control for correcting the deviation (error) of the conveyed amount, so that the transferred amount accumulated by the time t1 is executed. In order to eliminate the deviation, for example, after time t1, the motor speed is increased by an amount corresponding to the deviation of the conveyed amount. In this way, in the specific example illustrated in FIG. 3B, feedback control is executed so as to eliminate the deviation between the target transport amount and the actual transport amount, for example, at the time t3 when the motor 20 is stopped. ..

In loop creation, the amount of bending changes according to the amount of transport after the tip of the paper (the edge on the downstream side) hits the resist roller 14. That is, in the specific example shown in FIG. 3B, the amount of deflection is determined by the amount of transportation from time t2 to time t3. Therefore, in the specific example shown in FIG. 3B, the actual amount of deflection obtained by the actual amount of transportation becomes larger than the amount of bending of the target planned by the amount of target transportation. In the specific example shown in FIG. 3B, the motor speed is increased after the time t1 by the amount corresponding to the deviation of the conveyed amount accumulated by the time t1 by the feedback control of the motor 20, and the motor speed is increased from the time t1 to the time t3. This is because the amount of transportation has increased more than planned.

Therefore, the control unit 30 resets the error of the conveyed amount corrected by the feedback control of the motor 20 according to the paper passing through the predetermined position P1, and after the reset processing, the paper for creating the loop. Control the transport of.

FIG. 3C is a diagram showing a specific example of the reset process. FIG. 3C shows a specific example of the time change between the targeted transport amount (broken line) and the actual transport amount (solid line). The time change up to the time t1, which is the timing at which the pass sensor PS1 detects the passage of the paper position P1, is the same as the specific example of FIG. 3 (B).

In the specific example shown in FIG. 3C, the error in the transfer amount used for the feedback control of the motor 20 is reset according to the paper passing through the position P1 at time t1. For example, a reset signal is output from the control unit 30 to the motor 20 so that the transport amount (the transport amount used by the motor 20 for feedback control) at time t1 becomes zero, and the reset process is executed. As a result, the error in the amount of transportation accumulated by the time t1 (deviation from the target amount of transportation) becomes zero.

Then, the motor 20 is stopped and the driving of the first transport roller 11 is stopped at the time t3 after a predetermined time according to the target amount of bending from the time t1 when the paper passes the position P1.

By executing the reset process, the influence of the deviation of the conveyed amount accumulated by the time t1 on the feedback control of the motor 20 after the time t1 is eliminated, and the reset process is not performed (FIG. 3 (B)). In comparison with the above, it is possible to prevent the transport amount after the time t1 from deviating from the planned transport amount. As a result, the deviation of the deflection amount determined by the transport amount from the time t2 to the time t3 from the target value becomes smaller than in the case where the reset process is not performed.

In the specific example shown in FIG. 3C, the reset process in which the transport amount (including the error) at time t1 is set to zero has been described, but the reset process in which only the error in the transport amount at time t1 is set to zero is performed. You may be reset.

Next, the front-to-back inverted transfer control executed by the transfer control device 100 of FIG. 1 will be described. The switching gate 40 is used in the front-to-back transfer control.

FIG. 4 is a diagram showing a control example of the switching gate 40. FIG. 4 shows a specific example of the open / closed state of the switching gate 40 provided in the connection path connecting the transfer path R1 and the transfer path R2.

FIG. 4 (1) shows a switching gate 40 when the transport path R1 is maintained. For example, the switching gate 40 controls so that the connection path between the transfer path R1 and the transfer path R2 is closed as illustrated in FIG. 4 (1) when printing on only one side of the paper. Will be done. In the gate state of the switching gate 40 illustrated in FIG. 4 (1), the paper conveyed downstream from the fixing portion along the transfer path R1 is directly conveyed toward the discharge roller 16 along the transfer path R1. ..

FIG. 4 (2) shows a switching gate 40 at the time of route switching. For example, at the time of double-sided printing in which printing is executed on both sides of paper, the switching gate 40 is controlled so that the connection path between the transfer path R1 and the transfer path R2 is opened as illustrated in FIG. 4 (2). .. In the gate state of the switching gate 40 illustrated in FIG. 4 (2), the paper conveyed from the fixing portion to the downstream side along the conveying path R1 is guided to the connecting path by the switching gate 40 and conveyed through the connecting path. It is conveyed toward the path R2.

FIG. 4 (3) shows a state in which the paper is conveyed to the inverted position of the transfer path R2. For example, when the front and back of the paper are reversed for double-sided printing, the second transport roller 12 is driven in the forward rotation direction as illustrated in FIG. 4 (3), and the paper conveyed from the transfer path R1 is the transfer path. It is conveyed to the inverted position of R2. Then, after the paper is conveyed to the inverted position of the transfer path R2, the switching gate 40 is controlled so that the connection path between the transfer path R1 and the transfer path R2 is closed. After that, the second transfer roller 12 is driven in the reverse direction with the switching gate 40 closing the connection path between the transfer path R1 and the transfer path R2.

FIG. 4 (4) shows a state in which the second transport roller 12 is driven in the reverse direction. When the second transfer roller 12 is driven in the reverse direction in the gate state of the switching gate 40 illustrated in FIG. 4 (4), the paper at the inverted position of the transfer path R2 is transferred to the transfer path R3 (front and back) by the switching gate 40. Guided by an example of a route for inversion). In this way, when the paper is conveyed to the transfer path R3, the front and back sides are reversed and the paper is returned to the transfer path R1 (see FIG. 2).

The transport control device 100 of FIG. 1 executes the control described below in transporting the paper to the inverted position illustrated in FIG. 4 (3).

FIG. 5 is a diagram showing a specific example of transport control to the inversion position. In the specific example shown in FIG. 5, the time t1 is the timing at which the paper conveyed by the second transfer roller 12 passes through the predetermined position P2 on the transfer path R2. The timing at which the paper passes through the position P2 is detected by the pass sensor PS2. Time t2 is the timing at which the rear end of the paper that has passed the position P2 passes through the switching gate 40. Further, the time t3 is a timing at which the driving of the second transport roller 12 by the motor 20 is stopped. Then, the time t4 is a timing at which the rotation direction of the motor 20 is reversed and the second transfer roller 12 starts driving in the reverse direction.

FIG. 5A is a diagram showing a time change of the motor speed of the motor 20 that drives the second transport roller 12. The vertical axis of FIG. 5A is the speed of the motor 20, and the horizontal axis is the time axis. For example, a time change of the motor speed illustrated in FIG. 5A is created so that the paper is conveyed to the target position of the reversal position, and the time change of the motor speed (for example, the motor speed at each time) is shown. A control signal is output from the control unit 30 to the motor 20 that drives the second transfer roller 12. In this way, the motor 20 drives the second transfer roller 12 according to, for example, the time change of the motor speed illustrated in FIG. 5 (A).

Further, the motor 20 executes feedback control to drive the second transfer roller 12. The motor 20 executes, for example, feedback control for correcting a deviation (error) between a target transport amount (target transport amount) and an actual transport amount. The target transport amount can be calculated, for example, by an integral operation (integral operation with time as a variable) from the time change of the motor speed illustrated in FIG. 5 (A). Further, the control unit 30 may provide the motor 20 for driving the second transfer roller 12 with information regarding the target transfer amount.

FIG. 5B is a diagram showing a specific example of the targeted transport amount and the actual transport amount. The vertical axis of FIG. 5B is the amount of paper conveyed, and the horizontal axis is the time axis. FIG. 5B shows a specific example of the time change between the targeted transport amount (broken line) and the actual transport amount (solid line). For example, when the influence of the transport resistance generated in the process of transporting the paper causes a deviation of the transport amount, which is the difference between the target transport amount and the actual transport amount, as illustrated in FIG. 5 (B). There is.

For example, when the paper is conveyed with the deviation of the conveyed amount illustrated in FIG. 5B and the pass sensor PS2 detects the timing at which the paper passes through the position P2, the actual transferred amount is larger than the target transferred amount. , The timing of passage detected by the actual amount of transportation is earlier than the timing of passage scheduled by the target amount of transportation.

When it is found that the timing at which the paper passes through the position P2 is early, the motor 20 executes the feedback control for correcting the deviation (error) of the conveyed amount, so that the deviation of the conveyed amount accumulated by the time t1 can be detected. To eliminate the problem, for example, after time t1, the motor speed is reduced by an amount corresponding to the deviation of the conveyed amount. In this way, in the specific example illustrated in FIG. 5B, feedback control is executed so as to eliminate the deviation between the target transport amount and the actual transport amount, for example, at the time t3 when the motor 20 is stopped. ..

In the transfer control to the inversion position, the transfer distance of the paper changes according to the transfer amount from the time t1 when the paper passes the position P2 to the time t3 when the motor 20 is stopped. That is, in the specific example shown in FIG. 5B, the transport distance is determined by the transport amount from the time t1 to the time t3. Therefore, in the specific example shown in FIG. 5B, the target transport distance planned for the target transport amount (from the detection of the passage of the paper by the pass sensor PS2 to the time when the rear end of the paper passes through the switching gate 40). The actual transport distance obtained by the actual transport amount is smaller than the distance). In the specific example shown in FIG. 5B, the motor speed is reduced after the time t1 by the amount corresponding to the deviation of the conveyed amount accumulated by the time t1 by the feedback control of the motor 20, and the motor speed is reduced from the time t1 to the time t3. This is because the amount of transportation was less than planned.

If the actual transfer distance is shorter than the target transfer distance, the transfer is stopped before the rear end of the paper passes through the switching gate 40, and the subsequent switching operation of the switching gate 40 suppresses the paper to the switching gate 40. , May cause paper jams.

Therefore, the control unit 30 resets the error of the transfer amount corrected by the feedback control of the motor 20 in response to the paper passing through the predetermined position P2, and controls the transfer of the paper after the reset process. ..

FIG. 5C is a diagram showing a specific example of the reset process. FIG. 5C shows a specific example of the time change between the targeted transport amount (broken line) and the actual transport amount (solid line). The time change up to the time t1, which is the timing at which the pass sensor PS2 detects the passage of the paper position P2, is the same as the specific example of FIG. 5 (B).

In the specific example shown in FIG. 5C, the error in the transfer amount used for the feedback control of the motor 20 is reset according to the paper passing through the position P2 at time t1. For example, a reset signal is output from the control unit 30 to the motor 20 so that the transport amount (the transport amount used by the motor 20 for feedback control) at time t1 becomes zero, and the reset process is executed. As a result, the error in the amount of transportation accumulated by the time t1 (deviation from the target amount of transportation) becomes zero.

Then, the motor 20 is stopped to stop the driving of the second transport roller 12 at a time t3 after a predetermined time according to the target transport distance from the time t1 when the paper passes through the position P2.

By executing the reset process, the influence of the deviation of the conveyed amount accumulated by the time t1 on the feedback control of the motor 20 after the time t1 is eliminated, and the reset process is not performed (FIG. 5 (B)). In comparison with the above, it is possible to prevent the transport amount from time t1 to time t3 from deviating from the planned transport amount. As a result, the deviation of the transport distance from the target value, which is determined by the transport amount from the time t1 to the time t3, is smaller than that in the case where the reset process is not performed. That is, as compared with the case where the reset process is not performed, the deviation of the inversion position from the target position is small, and the possibility of paper jam due to the operation of the switching gate 40, for example, is also reduced.

In the specific example shown in FIG. 5C, the reset process in which the transport amount (including the error) at time t1 is set to zero has been described, but the reset process in which only the error in the transport amount at time t1 is set to zero is performed. You may be reset.

Although the preferred embodiments of the present invention have been described above, the above-described embodiments are merely examples in all respects, and do not limit the scope of the present invention. The present invention includes various modified forms without departing from its essence.

10 Transfer roller, 11 1st transfer roller, 12 2nd transfer roller, 14 resist roller, 16 discharge roller, 18 discharge roller, 40 switching gate, 100 transfer control device.

Claims (4)

A first transport roller that transports the medium along the first transport path ,
A first motor for driving the first transport roller by executing feedback control for correcting an error in the transport amount due to the transport, and
A control unit that controls the transport of the medium after resetting the error of the transport amount corrected by the feedback control according to the passage of the medium through the predetermined position of the first transport path .
A second transport roller that branches from the first transport path and transports the medium along the second transport path connected to the path for inverting the front and back of the medium.
A second motor that executes the feedback control to drive the second transfer roller, and
Have,
The control unit executes the reset process in response to the medium passing through the predetermined position of the second transport path, and the medium passes through the predetermined position of the second transport path. After a predetermined time from the above, the driving of the second transport roller by the second motor is stopped.
A transport control device characterized by this. In the transport control device according to claim 1,
The first motor starts driving the first transport roller in response to control from the control unit, and performs the feedback control before the medium passes through the predetermined position of the first transport path. Execution to drive the first transport roller,
A transport control device characterized by this. In the transport control device according to claim 1 or 2.
It has a resist roller provided on the downstream side of the predetermined position of the first transport path, and has a resist roller.
The control unit executes the reset process in response to the medium passing through the predetermined position of the first transport path, and the medium passes through the predetermined position of the first transport path. After a predetermined time from the above, the driving of the first transport roller by the first motor is stopped.
A transport control device characterized by this. In the transport control device according to claim 1 ,
The control unit stops driving the second transport roller by the forward rotation of the second motor after the predetermined time after the medium passes through the predetermined position of the second transport path. After that, the gate that opens and closes the connection path connecting the first transfer path and the second transfer path is controlled to close the connection path, and then the second motor is rotated in the opposite direction to obtain the second motor. (2) By driving the transport roller in the opposite direction, the medium is transported to the path for turning over the front and back.
A transport control device characterized by this.

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