JP3854605B2 - Rotary printing press - Google Patents

Description

The present invention relates to a rotary printing press .

2. Description of the Related Art Conventionally, a technique for synchronizing the mutual phases of mechanical axes that are rotationally driven by a plurality of motors in a rotary printing press is known. The apparatus shown in FIG. 4 is one of them.
The schematic function will be described with reference to FIG. 4 using a rotary printing press as an example. (See Patent Document 1)

That is, as shown in FIG. 5, the origin is aligned by the following procedure.
(1) When the printing operation is started, first, the motors 11, 12, 13, and 14 of the printing machines 1, 2, 3, and the folding machine 4 are operated at a low speed. That is, a constant low speed signal is output from the overall control device 70 to each of the control devices 61, 62, 63, 64, and each of the control devices 61, 62, 63, 64 outputs each motor 11, 12, 13, and 14 are controlled to rotate at a constant low speed.

  (2) The proximity switches 21, 22, 23, 24 and rotary encoders 31, 32, 33, 34 detect the origins of the machine axes 1e, 2e, 3e, 4e of the printing machines 1, 2, 3, and the folding machine 4. Then, in the control devices 61, 62, 63, 64 of the printing presses 1, 2, 3, and the folding machine 4, the phases of the mechanical axes 1e, 2e, 3e, 4e are predetermined phases (register positions) with respect to the reference phase. The motors 11, 12, 13, and 14 are accelerated / decelerated so that the phase is advanced or delayed.

  That is, the phases of the machine axes 1e, 2e, 3e, and 4e of the printing presses 1, 2, and 3 and the folding machine 4 with respect to the phase of the reference pulse (made by the oscillator) output from the overall control device 70, respectively. The motors 11, 12, 13, and 14 that are rotating at a low speed are temporarily accelerated and decelerated so as to reach a predetermined phase (register position). When it is confirmed that all the printing presses 1, 2, 3 and the folding machine 4 are synchronously operated at the register position, the speed command value output from the overall control device 70 to the control devices 61, 62, 63, 64. And the motors 11, 12, 13, and 14 are accelerated to a predetermined printing speed.

Further, as shown in FIG. 6, the origin adjustment can be performed during the gentle acceleration of the motors 11, 12, 13, 14, not during the constant speed operation. That is, the origin is adjusted by the following procedure.
(1) When the printing operation is started, first, the motors 11, 12, 13, and 14 of the printing machines 1, 2, 3, and the folding machine 4 are accelerated at a moderate acceleration rate. That is, the output speed instruction to accelerate at a moderate acceleration rate from the overall controller 70 to the respective control devices 61, 62, 63 and 64, the respective control devices 61, 62, 63 and 64, and have groups Dzu this command, Control is performed so that each of the motors 11, 12, 13, and 14 accelerates at a moderate acceleration rate.

  (2) The proximity switches 21, 22, 23, 24 and rotary encoders 31, 32, 33, 34 detect the origins of the machine axes 1e, 2e, 3e, 4e of the printing machines 1, 2, 3, and the folding machine 4. Then, the motors 11, 12, 13, and 14 are accelerated and decelerated so that the phases of these mechanical axes are advanced or delayed as in the case of low speed operation.

(3) When it is confirmed that all the printing machines 1, 2, 3 and the folding machine 4 are operating synchronously at the register position, the speed command output from the overall control device 70 to the control devices 61, 62, 63, 64 The acceleration rate of the value is made steep, and the motors 11, 12, 13, and 14 are accelerated to a predetermined printing speed according to this acceleration rate.
As described above, the conventional synchronous control device operates and does not require the rotary printing press to be stopped during the origin adjustment period.

JP-A-10-114508

However, the conventional apparatus has the following problems.
In other words, during phase alignment, the rotary printing press must be operated at a constant speed at a low speed or moderately accelerated, and after phase alignment is completed, switching to increase the machine acceleration to normal operation acceleration. is required.
As a result, the operation mode becomes complicated, which may cause fluctuations in the web tension, and the productivity is not reduced during the phase adjustment and the period until switching to normal operation speed. .

  Even if the speed is low, the phase of the folding machine is adjusted during operation, so depending on the origin of the folding machine, if the folding machine is accelerated, the printing paper will be pulled abnormally, and the needle hole May break and accumulate waste paper in the folder. Conversely, when the speed is reduced, a paper jam may occur.

In addition, when performing position synchronization during low-speed operation, the printing cylinder automatically corrects and rotates at the start of operation and the number of rotations varies, so the rotation speed of the printing cylinder is unexpected, especially for operators who are cleaning the plate cylinder. Is dangerous.
In addition, since a rotary encoder that outputs a pulse signal corresponding to the rotation of the mechanical axis, that is, an incremental encoder, was used, in the unlikely event that a power down occurs, the count value may become zero and the current position may become unknown .
Further, when noise is mixed in the rotary encoder or a line from the rotary encoder, the noise is also counted as a position pulse signal, so that it becomes a position error as it is.
Further, a proximity switch or the like serving as a position reference is required for each printing machine and folding machine.

The present invention has been made in view of the above problem, and after the phase alignment is completed, there is no need to switch to increase the acceleration of the machine to the normal operation acceleration, and the operation mode is simplified and the operation speed is increased to the operation speed. An object of the present invention is to provide a rotary printing press and a synchronous drive control method for the motor that can reduce the time and improve the productivity.
It is another object of the present invention to provide a rotary printing machine using a folding machine and a printing machine, in which the folding machine itself is not phase-matched during the operation of the folding machine motor, thereby reducing printing paper damage by the folding machine. To provide a printing machine .
Another object of the present invention is not to use an incremental encoder that outputs a pulse signal according to the rotation of the machine shaft. Therefore, in the unlikely event that a power down occurs, the count value becomes zero and the current position becomes unknown. Further, it is an object of the present invention to provide a rotary printing machine that does not require a proximity switch or the like that serves as a position reference.

The present first invention, a plurality of printing press, a plurality of folding machine, a plurality of motors for driving the respective said printing press and該折machine, said printing machine,該折machine, and a plurality of motor respectively in rotary printing machine having a control device having a plurality of drivers that control,
The control device includes:
A master having a sequencer for instructing which folding machine to connect to the printing press, and generating virtual master axis data by calculating based on phase information of the folding press before the start of operation of the rotary printing press A plurality of stations, one corresponding to each of the folding machines,
The motor for controlling the folder is controlled at a predetermined acceleration rate by a motor rotation command signal obtained by converting the virtual master axis data generated by the master station corresponding to the folder to the driver that controls the motor for the folder. Control to accelerate with,
The virtual master axis data generated by the master station corresponding to the folding machine connected in accordance with an instruction from the sequencer is captured by the driver that controls the motor of each printing press, The motor of the printing press is controlled to increase or decrease the predetermined acceleration rate so that the phase of the motor of each printing press is advanced or delayed by a motor rotation command signal obtained by converting virtual master axis data. The synchronous operation control is performed.

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According to such a technique, the present invention does not perform the position control of the motor of the folding machine serving as a reference, and performs the position control of the motor of the printing cylinder during acceleration to the normal operation. The time required for the position control of the motor is unnecessary, and since it is not switched to the normal speed after the position synchronization, the time to reach the normal operation speed is shortened and the productivity is improved.

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As a second aspect of the present invention, the control device controls the operation of the plurality of sets of printing presses as a set of the plurality of printing presses connected to the one folding machine instructed by the sequencer. The operation control is performed by combining different printing apparatuses for each group .

According to this technique, the present invention inputs the information on the current position of the folding machine to the folding machine master station before starting the operation of the rotary printing press, and the folding machine master station starts calculation based on the position. As a result, it is not necessary to perform phase alignment of the folding motor when the rotary printing press is started up, so that it is possible to prevent the occurrence of problems due to the difference in web paper speed.

In addition, in the case of the conventional method of performing phase matching of the folding machine after the rotary printing press is started, the web paper fed out at a constant speed is accelerated by the folding machine motor for phase matching. Abnormal pulling force may be generated and eventually the needle hole may be broken and the waste paper may accumulate or the web paper may break. Conversely, if the speed is reduced, the web paper will sag and become jammed. However, since the position of the printing press motor is first controlled based on the motor position of the folding machine, such a problem does not occur.

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The rotary printing press has a plurality of absolute rotary encoders that detect phases of the plurality of motors,
The controller is
Each of the master stations corresponding to the folding machine is configured to generate the virtual master axis data with reference to the phase information of the motor of the folding machine detected by the absolute rotary encoder,
The means of the present invention is also effective in controlling the operation of the motor of the printing press and the phase of the motor of the folding machine detected by the absolute rotary encoder .
According to such technical means, since a multi-rotation absolute type was adopted, the number of pulses after passing the proximity sensor as the reference position was calculated by rotating the motor to detect the origin position of each motor. Thus, there is no need to obtain the phase, and the phase can be obtained while the motor is stationary. Therefore, time for finding the origin is unnecessary, and the time required for synchronous control can be shortened.

Also, by using an absolute type rotary encoder, even if the rotary encoder power is temporarily down, the origin position will not be unknown as in the conventional incremental type, and even if noise is mixed, It is transient and is not held as a position error, that is, as a top-to-bottom registration error as in the increment type.
Furthermore, the proximity sensor required for detecting the origin position is no longer required, and in addition to improving productivity, stability, safety and reliability are improved.

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In addition, with a plurality of the folding machine, the printing cylinder position control unit (hereinafter referred to as a printing machine master station) for controlling the folding machine and the printing machine corresponding to the folding machine is controlled by a sequencer,
The folding machine can be arbitrarily selected by sequencer control,
Further, it is also an effective means of the present invention that the respective folding machine master stations and printing machine master stations are interconnected by an optical double link so that the virtual master axis data can be transmitted.

  According to such technical means, it is possible to control the operation of a plurality of sets of printing machines at the same time, and to control the operation with different operation patterns for each folding machine, thereby increasing the degree of freedom of combination of each printing apparatus and increasing the types of printing possible .

As described above in detail, according to the present invention, the position data at the time of stopping the motor on the folding machine side is obtained during acceleration to the normal operation after the plurality of motors are synchronously controlled and operated slowly. As a reference, since the position control of the motor of each printing press is performed, the position control of the motor of each printing press is not performed during the acceleration leading to the normal operation without performing the position control of the motor of the folding machine as a reference. The time required for the position control of the reference motor as in the prior art is not required, and since it is not switched to the normal speed after the position synchronization, the time to reach the normal operation speed is shortened and productivity is improved.

When the present invention is applied to a rotary printing machine having a folding machine and a printing machine, the time to reach the normal operation speed is shortened, the productivity is improved, and the folding machine motor is started when the rotary printing machine is started up. Therefore, the folding machine motor does not generate an abnormal pulling force due to the speed increase for phase alignment on the web paper fed at a constant speed, and the web paper breaks. Or paper jams.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

FIG. 1 is an overall configuration diagram of a rotary printing machine equipped with a synchronous control apparatus according to an embodiment of the present invention, and FIG. 3 mainly illustrates functions related to phase alignment of the control apparatus. It is explanatory drawing.
A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, each printing machine 1a, 1b, 1c, folding machine 1d includes a drive motor 2a, 2b, 2c, 2d, infeed IFa, IFb, IFc motor 2f, 2g, 2h, RTFDRa motor. 2i, drag DRb motor 2j absolute type rotary coupled to drivers 3a, 3b, 3c, 3d, 3f, 3g, 3h, 3i, 3j, each motor for printing and folding machines Encoders 4a, 4b, 4c, and 4d, and printing presses and folding machine master stations 5a, 5b, 5c, and 5d that perform control such as phase matching and the like individually corresponding to each printing press and folding machine. These are connected by an optical double link 6.

Among the above master stations, the folding machine master station 5d generates virtual master axis data and the like by calculation based on the folding machine data in accordance with the rotary printing press operation command, and sends the virtual master axis data to each master station. A function to send a control command signal to the motor driver for folding machine, the motor driver for RTF and the drag motor driver, and a sequence control interface function between the connected sequencer.

  On the other hand, the master station 5 (a to c) corresponding to each printing machine has a function of transferring virtual master axis data sent from the master station 5d of the folding machine via the optical double link 6, and a motor for the printing machine. It has a function to send a control command signal to the driver and a sequence control interface function with a connected sequencer.

  The printer driver and the folder driver are respectively supplied from the control command signal from the corresponding master station, and from the absolute type rotary encoder 4 (ad) connected to the machine axis of the printer and the folder. These signals are compared, and control to increase or decrease the speed of the motor is performed. At this time, the acceleration rate and offset speed of the motor can be set in advance by each driver.

  The infeed drivers 3f, 3g, and 3h, the drag driver 3j, and the RTF driver 3i are connected to the speed control command signals from the corresponding master stations and the infeed, drag, and RTF mechanical axes. A signal from the incremental type rotary encoder (not shown) is compared to control the motor speed to the command value.

Next, an outline of the control program of the present apparatus configured as described above will be described with reference to FIG. In FIG. 3, the vertical axis represents the machine speed, the horizontal axis represents time t, and the motor control line is connected to L1 where the slow operation is performed from time t1, L2 which is the acceleration region, and L3 which is the steady operation region. Has been.
The drive motors of the printing press, infeed, drag, and RTF are all virtual masters generated with reference to the folding machine motor shaft position of the folding machine motor 2d that is captured in the position memory of the folding machine master station 5d. Based on axis data.
First, while the rotary printing press is started and the slow running operation is being performed, the printing press motor does not yet perform phase matching and performs speed control at a constant speed.

From the slow operation region L1 in which the printing press motor rotates in synchronization with the speed, the position control is switched when the normal operation acceleration region L2 is entered, and the speed of each printing press motor is set to the printing speed (synchronous speed). Start phase alignment by accelerating or decelerating.
After the alignment is completed, the wearing time is the same as in the prior art, but the phase alignment is always completed before that. And although it reaches steady operation, position control is performed continuously after that.

The folding motor performs position control from start to finish based on the virtual master axis data.
The infeed, drag, and RTF motors also perform speed control from start to finish based on virtual master axis data.
In the printing preparation stage such as maintenance, paper threading, ink and blanket washing, the operation is performed by a separate fixed speed command device separated from the master station.

In the synchronous control device according to the present embodiment, the position control and the speed control are performed as described above. More specifically, the position control and the speed control are performed in the following procedure.
(1) Before starting the rotary printing press operation including the slow operation, the information on the current position of the folding machine is input to the virtual master axis data of the master station 5d of the folding machine.
The master station 5d starts calculation based on the position. As a result, it is not necessary to perform the phase adjustment of the folding motor when the rotary printing press is started up, so that the occurrence of problems due to the speed difference of the web paper is prevented.
That is, before starting the operation of the rotary printing press, a signal from the absolute rotary encoder 4d indicating the current phase before the start of the operation of the folding machine is input to the virtual master axis data storage unit of the master station of the folding machine, and the virtual master of the folding machine is input. The axis data storage unit stores the value as a reference for calculation when the rotary printing machine is started up and the printing machine and the folding machine are operated synchronously.

In the case of a conventional method in which the rotary machine is phased after the rotary printing press is started, the web is controlled at a constant speed by infeed IFa, IFb, IFc, RTFDRa, and drag DRb. When the motor of the folding machine is accelerated for phase matching, the paper generates an abnormal pulling force, and eventually breaks the needle hole and accumulates damaged paper, or the web paper may break. Conversely, if the speed is reduced, the web paper may sag and may become jammed. In the present embodiment, since the position of the printing press motor is first controlled based on the motor position of the folding machine, such a problem does not occur.

(2) When the slow operation of the rotary printing press is started, each motor 2 (ac) of each press 1 (ac) shown in FIG. 1 is a virtual master generated by the master station of the folding machine. The axis data is converted into a control signal by each master station 5 (ac) and output to the driver 3 (ac) of each motor, and is operated by speed synchronous control as shown in FIG. That is, at this stage, position control for adjusting the phase is not yet performed.

This prevents the risk that the corrective operation status will vary due to the phase alignment of the machine axes of the printing presses having different initial positions.
For example, in a printing press that is manually operated when the machine is stopped, the mechanical axis of each printing press is stopped at an arbitrary position. That is, the mechanical axes of the printing presses are out of phase. If it is operated in a position-synchronized manner from the start of the slow-motion operation, the machine shafts of the respective printing presses are to be aligned from that position, so that the state of motor rotation varies among the printing presses. In the slow operation, the operator may manually clean the plate cylinder surface. However, since the operator cannot predict the rotation unevenness, if the rotation speed is changed, the operability is deteriorated and there is a danger.

In the present embodiment, since the speed-synchronized operation is performed during the slow-motion operation, all the motors start and operate at the same speed as the slow-motion operation is started, so that the operability and safety are not impaired.
During this time, the motor 2d of the folding machine 1d continues the position synchronization control based on the virtual master axis data. The infeed motors 2f, 2g, 2h, the RTF motor 21, and the drag motor 2j are subjected to speed synchronization control based on the virtual master axis data at the same time as the slow motion operation of the rotary printing press is started.

(3) When acceleration for the printing operation of the rotary printing press is started, in the acceleration region L2 of FIG. 3, the motor 2 (ac) of each printing press 1 (ac) shown in FIG. Position synchronization control is started while accelerating the 1d motor 2d at the normal operation acceleration rate as shown in FIG.
That is, the master station 5 (ac) corresponding to each printing machine that has received the virtual master axis data from the master station 5d of the folding machine converts the data and sends it to the motor drivers 3a, 3b, 3c for normal operation. A motor rotation command signal is issued so as to accelerate at a rate of. Further, the master station 5d of the folding machine issues a motor rotation command signal to the driver 3d so as to accelerate at the normal operation rate.

The driver 3 (ac) of each printing machine receives the rotation received by the phase of the mechanical axis of each printing machine 1 (ac) detected by the absolute rotary encoder 4 (ac) at that time. The motor 2 (ac) is accelerated or decelerated so that each phase of the mechanical axis is advanced or delayed so as to be in phase with the command signal, that is, the signal that matches the phase of the folding machine. Specifically, as shown in FIG. 3, the driver 3 (ac) of each printing press has the same speed as that of the folding machine while the offset speed increases / decreases with respect to the folding machine. Speed is set to parallel speed.
The infeed motors 2f, 2g, 2h, the RTF motor 21, and the drag motor 2j perform speed control based on virtual master axis data regardless of the printing operation state of the rotary printing press as shown in FIG.

  After the motors 2 (ac) and 2d of all the printing presses 1 (ac) and the folding machine 1d are synchronized, the acceleration is continued as it is, and the printing press 1 (a The printing cylinder of -c) is put on (printed state), and further accelerated, and is operated at a constant speed (L3) at a predetermined printing speed.

In this embodiment, the rotary encoders 4 (ad) coupled to the respective motors 2 (ad) of the printing apparatuses 1 (ac) and the folding machine 1d shown in FIG. Since the absolute type is adopted, the origin position of each motor is detected, the motor is rotated like an incremental type, and the phase is calculated by calculating the number of pulses once passing through the proximity sensor as the reference position. There is no need, and the phase can be obtained while the motor is stationary. That is, since an absolute type rotary encoder is used, the rotation of the motor for obtaining the phase of each motor is not required in principle.
Therefore, time for finding the origin is unnecessary, and the time required for synchronous control can be shortened.

In the present embodiment, the driver 3 (ad) that drives the motor is provided with a function of making the acceleration rate and offset speed of the motor variable during synchronous operation. Thus, the time required for synchronous control can be shortened. For this reason, it is possible to execute phase alignment in a short time even at a rapid rate of acceleration such as normal operation. As a result, the synchronous operation can be completed during the normal operation with a high acceleration rate, and an improvement in productivity can be expected.
Further, since there is no switching from the synchronous operation to the normal operation, the apparatus is correspondingly simplified, and there is no web tension fluctuation factor generated at that time.

In addition, by using the absolute type rotary encoder 4 (a to d), even if the rotary encoder is powered down temporarily, the origin position is not unclear as in the conventional incremental type. Even when noise is mixed, it is transient and is not held as a position error, that is, as a top-to-bottom register error as in the increment type.
In addition, the proximity sensor that was necessary to detect the origin position is no longer needed. As described above, the synchronization device according to the present embodiment can improve productivity, stability, safety, and reliability.

Next, a second embodiment will be described. FIG. 2 is an overall configuration diagram of a rotary printing machine provided with the synchronous control device according to the second embodiment when the number of folding machines is two (or representative of two or more).
The master station 5n corresponding to the second folding machine 1n is also a virtual master on the basis of the data of the folding machine 1n, similarly to the master station 5d corresponding to the folding machine 1d shown in the first embodiment (FIG. 1). Is generated by calculation, and the virtual master axis data is sent to each master station.

  In the case of FIG. 2, the virtual master axis data circulates five master data as one communication frame through the optical double link at a speed of 8 milliseconds or the like, and changes data one after another. As the number of printing apparatus blocks or folding machines to be connected increases, the number of master stations increases, and a data group (communication frame) carrying the same number of master data as the number of master stations circulates as described above. At this time, the master stations 5d and 5n of the folding machine generate data as described above, but the master stations 5a, 5b, and 5c of other printing press blocks circulate as empty data because they do not generate data. The drivers under the jurisdiction of each master station, for example, the drivers 3C, 3C1 to 3C7, 3h, etc. under the jurisdiction of the master station 5c, determine which folding machine to connect to before operating the printing press. Is done. In other words, each driver 3C or the like is instructed which master data to use, and takes in the instructed data.

  Therefore, the second embodiment has the effect of being able to simultaneously control the operation of a plurality of sets of printing presses in addition to obtaining the same operation and effect as the first embodiment described above. That is, in the second embodiment, operation control can be performed with a different operation pattern for each folding machine. As shown in FIG. 2, in a so-called shaftless printing machine in which a motor is provided for each printing color and is not mechanically connected as shown in FIG. There is an effect of increasing types.

  As described in detail above, the present embodiment is a printing machine that is rotationally driven by a plurality of motors. In the control device for matching the phases of the plurality of motors, a control command is issued from the data of the folding machine. Virtual master axis data that is generated and distributed to each master station is introduced, and in the phase alignment operation, the printing press is driven by a command signal based on the virtual master axis data, and speed synchronization control is performed during slow operation, After the start of printing acceleration, switching to position synchronization control is characterized.

This eliminates the need for phase alignment of the folding motor when starting up the rotary printing press, so that the tension motor has an abnormal pulling force due to the speed increase for phase alignment on the web paper fed at a constant speed. Will not occur, and the web paper will not break or become jammed.

Then, a multi-rotation type absolute encoder is used to detect the rotation of the motor, and the current phase of the folding machine motor is detected before starting the operation of the rotary printing press. When the operation of the rotary printing press is started, speed synchronization control is performed, and the folder motor does not perform phase matching.
Therefore, operability and safety are not impaired.

According to the present invention, after the phase alignment is completed, there is no need to switch to increase the acceleration of the machine to the normal operation acceleration, the operation mode is simplified, the time until the operation speed is increased, and the productivity is reduced. An improved rotary printing press can be provided.
According to the present invention, in the rotary press by a folding machine and the printing machine, without phase adjustment Oriki itself during operation of the folding machine motor, thus providing a rotary printing machine damage of the printing paper by the folding machine is reduced I can do it.

It is a whole lineblock diagram of a rotary printing machine provided with the synchronous control device concerning a 1st embodiment of the present invention in case there is only one folding machine. It is a whole lineblock diagram of a rotary printing machine in case there are two folding machines provided with a synchronous control device concerning a 2nd embodiment of the present invention. It is explanatory drawing explaining the function regarding the phase alignment mainly of a control apparatus. It is a whole lineblock diagram of a rotary printing machine provided with the synchronous control device by a prior art. It is a figure explaining the origin adjustment in the constant speed operation by a prior art. It is a figure explaining the origin adjustment in the gentle acceleration by a prior art.

Explanation of symbols

1a to 1c printing machine 1d folding machine 2a to 2c printing machine motor 2d folding machine motor 5a to 5c printing machine master station 5d folding machine master station

Claims (3)

A plurality of printing press, a plurality of folding machine, a plurality of motors for driving the respective said printing press and該折machine, said printing machine,該折machine, and a plurality of drivers respectively control a plurality of motors in rotary printing machine having a control device including,
The control device includes:
A master having a sequencer for instructing which folding machine to connect to the printing press, and generating virtual master axis data by calculating based on phase information of the folding press before the start of operation of the rotary printing press A plurality of stations, one corresponding to each of the folding machines,
The motor for controlling the folder is controlled at a predetermined acceleration rate by a motor rotation command signal obtained by converting the virtual master axis data generated by the master station corresponding to the folder to the driver that controls the motor for the folder. Control to accelerate with,
The virtual master axis data generated by the master station corresponding to the folding machine connected in accordance with an instruction from the sequencer is captured by the driver that controls the motor of each printing press, The motor of the printing press is controlled to increase or decrease the predetermined acceleration rate so that the phase of the motor of each printing press is advanced or delayed by a motor rotation command signal obtained by converting virtual master axis data. A rotary printing press characterized by performing synchronous operation control. The control device is configured to control the operation of the plurality of sets of printing presses as a set of the plurality of printing presses connected to the one folding machine instructed by the sequencer, and is different for each set. 2. The rotary printing press according to claim 1, wherein operation control is performed in combination with a printing apparatus . The rotary printing press has a plurality of absolute type rotary encoders that detect phases of the plurality of motors,
The control device includes:
Each of the master stations corresponding to the folding machine is configured to generate the virtual master axis data on the basis of information on the phase of the motor of the folding machine detected by the absolute rotary encoder,
The rotary printing press according to claim 1 or 2, wherein the phase of the motor of the printing press detected by the absolute type rotary encoder and the phase of the motor of the folding device are synchronously controlled.

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