JPH0547397B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a register adjustment device for a printing press.

[Prior Art] For example, when performing multi-color printing, the degree of overlap of the common line areas of each color is judged by looking at the finished print, and if the printing is misaligned, the mounting position of the plate is checked. Register adjustment work is carried out by either making corrections or by moving the cylinder to which the plate is attached (hereinafter referred to as the plate cylinder).

Conventional register adjustment operations include a manual method in which the plate cylinder is moved directly by hand, and a remote control method in which a motor is attached to the printing mechanism and the motor is moved by operating a push button switch. In the remote control method, as shown in Figure 1, the position of plate cylinder 025 is controlled by a potentiometer.
Detected at 028, 031, plate cylinder 025 by voltmeter M/M
Display the location of.

The zero scale of the voltmeter M/M corresponds to the reference position of the plate cylinder relative to the printing press. Voltmeter M/M is the second
As shown in the figure, the center of the scale is zero, and the scale is graduated from zero to the left and right to the distance that the plate cylinder can move in proportion to the amount of movement of the plate cylinder.

[Problems to be Solved by the Invention] However, in such a device, the pointer of the voltmeter moves with the movement of the plate cylinder, and when the movement of the plate cylinder stops, the pointer also stops at that position. Therefore, in order to move the plate cylinder during register adjustment work, the operator had to keep pressing the push button switch until the pointer of the voltmeter M/M reached the target amount of movement, which resulted in a problem of poor work efficiency. .

The present invention was proposed to solve such problems, and an object of the present invention is to provide a register adjustment device for a printing press that efficiently performs register adjustment work.

[Means for Solving the Problems] The registration adjustment device for a printing press according to the present invention includes an adjustment motor having a slight inching mechanism for moving the plate cylinder in the rotational direction or axial direction, and an arbitrarily determined plate cylinder. a plurality of printing units each comprising a detection circuit for detecting the coordinate values of the rotational direction position and the coordinate value of the axial position of the plate cylinder in an absolute coordinate system having the reference position as the origin; A display circuit that stores each detected value as a digital quantity and digitally displays the current position data of the plate cylinder by pressing a selection button, a setting device that sets the coordinate values of the target position of the plate cylinder, and a display circuit that digitally displays the current position data of the plate cylinder by pressing a selection button. After inputting the overrun distance, drive the adjustment motor at a constant speed until the plate cylinder reaches the target position minus the overrun distance before the electrical signal from the detector becomes equal to the set value. Thereafter, the device is characterized by comprising an adjustment circuit that increments the electric signal from the detector until it matches the set value after overrun due to inertia.

[Function] (1) Coordinate values of the current position of the plate cylinder of each printing unit
A1 and the coordinate value B1 of the new position after starting the movement are
For each plate cylinder, digital values are detected and displayed as coordinate values in an absolute coordinate system with an arbitrarily determined reference position of the plate cylinder as the origin.

(2) However, the required movement distance of the plate cylinder for register adjustment of the printing press is specified by the difference D1 between the coordinate value A1 of the current position of the plate cylinder and the coordinate value C1 of the target position for each plate cylinder.
This is done by inputting on the numeric keypad 7. At this time, the display 4 displays the required amount of movement of the plate cylinder, that is, the correction amount D1 from the current position of the plate cylinder. This display of the correction amount D1 continues until the numeric keypad setting button 15 is pressed.

(3) When the numeric keypad setting button 15 is pressed, the new position B1 of the plate cylinder being moved is displayed on the display 4 as coordinate values of an absolute coordinate system with the reference position of the plate cylinder as the origin.

(4) At the same time, the CPU circuit 19 calculates the necessary correction amount D1 from the current position of the set plate cylinder and the coordinate value A1 of the current position of the plate cylinder in the absolute coordinate system.
The sum (composite value) E1 of E1 is calculated and stored as an absolute coordinate value with the plate cylinder's reference position as the origin as a digital value, and the electric signal is transferred from the coordinate value A1 of the plate cylinder's current position to the coordinate of the target position. Hold until value E1 is reached.

(5) Furthermore, the CPU circuit 19 processes the electric signals of the unit selection push button 6, the driving direction selection push button 10 or the forward/backward direction selection push button 11, and the digital key 7, selects the relay circuit 23, and selects the adjustment motor 27, 30 to move the plate cylinder.

(6) The CPU circuit 19 inputs the preset overrun distance of the plate cylinder, and before the electric signal from the steering direction potentiometer 28 becomes equal to the held value of the CPU circuit, the preset plate cylinder overrun distance is In anticipation of the overrun distance, the drive signal to the steering direction adjustment motor 27 is stopped as shown in FIGS. 5 and 6. In the case shown in FIG. 5 or 6 a, the plate cylinder 25 moves (overruns) together with the adjustment motor 27 due to inertia, and the electric signal from the driving direction potentiometer 28 is
It stops when it matches the value held by the CPU circuit 19.

If, as shown in FIGS. 5 and 6 b and c, the electric signal from the potentiometer 28 for moving and driving direction due to the inertia force of the plate cylinder 25 is transmitted to the CPU.
If it does not match the value held in circuit 19,
The CPU circuit 19 rotates the steering direction adjustment motor 27 to the normal rotation as shown in FIG.
As shown in e of the figure, a signal is output to drive the plate cylinder 25 by a reverse inching motion, and the plate cylinder 25 is brought into alignment with the coordinate values of the target position. At this time, the coordinate values of the position of the plate cylinder 25 are displayed on the digital display 4.

(7) Although only one display unit 4 is provided, for printing machines with n printing units, the display can be switched by selecting a push button to display the following 4n types of data. .

A unit selection pushbutton 6 allows selection of a unit for register adjustment.
The selection is equal to the number of printing units, i.e. n
I can only do different types.

The steering direction selection push button 10 and the longitudinal direction selection push button 11 allow selection of two types: the steering direction or the longitudinal direction.

Using the numeric keypad 7, you can select the correction amount D1 from the current position of the plate cylinder, and using the numeric keypad setting push button 15, you can select the coordinate values of the current position (or new position) of the plate cylinder with the reference position of the plate cylinder as the origin. can.

When numeric keypad 7 is pressed, the amount by which the plate cylinder should be moved from its current position (correction amount), that is, the difference D1 between the coordinate value A1 of the plate cylinder's current position and the coordinate value C1 of the target position, is input, and the correction amount from the current position is input. D1 is displayed. This value is displayed until the numeric keypad setting pushbutton 15 is pressed. When the numeric keypad setting push button 15 is pressed, the coordinate values of the current position of the plate cylinder (or the new position during movement) are displayed. Therefore, on the display 4, n×2×2=4n
It is possible to display types.

[Example] An example of the present invention will be described with reference to the drawings.
Figure 3 is a block diagram showing the circuit configuration, Figure 4
This figure is a front view showing the operation panel of FIG. 3, and FIGS. 5 and 6 are diagrams showing the relationship between the movement of the plate cylinder and the drive of the adjustment motor by this apparatus.

In Figures 3 and 4, 1 is an operation panel, 2
3 is a control unit, 3 is a printing unit, 4 is a digital display, and 5 is a color magnet that indicates the color of ink used in the corresponding printing unit, and is made removable. 6 is a unit selection push button made of a momentary push button with a lamp, and the numbers 1 to 4 of unit 6 indicate the number of the printing unit. 7 is a numeric keypad, 8 is a steering direction zero point return push button, 9 is a longitudinal direction zero point return push button, 10 is a steering direction selection push button, 11 is a longitudinal direction selection push button, 12 is a forward rotation direction fine adjustment push button, 8 to 1
2 are each made of a momentary push button with a lamp. 13 is a self-holding fine adjustment switching push button, 1
4 is a push button for fine adjustment of the reverse direction, 15 is a push button for setting a numeric keypad, 16 is a stop push button, and 14 to 16 are each made of momentary push buttons. 17,18
are buffer circuits, 19 are CPU circuits, and 2 are respectively buffer circuits.
0 is an I/F circuit, 21 is an A/D circuit, 22 is a multiplexer circuit, 23 is a relay circuit, and 24 is a fine adjustment setting device, which is a digital switch that sets the amount of movement when the plate cylinder is moved by a certain amount. Become. 2
5 is a plate cylinder, 26 is a steering/driving direction gear device, 27 is a steering/driving direction adjustment motor, 28 is a steering/driving direction potentiometer, 29 is a longitudinal gear device, 30 is a longitudinal direction adjustment motor, and 31 is a longitudinal direction adjustment motor. It is a directional potentiometer.

Next, the roles and functions of each mechanical element will be explained.
The digital display 4 displays the current position of the plate cylinder as coordinate values in the absolute coordinate system when the numeric keypad setting push button 15 is pressed, and displays the current position of the plate cylinder as coordinate values in the absolute coordinate system when the numeric keypad 7 is pressed. Display the corrected value.

A unit selection pushbutton 6 selects which printing unit out of a plurality of printing units is to be adjusted.

The numeric keypad 7 is used to input the register correction value.

Steering direction selection push button 10 and longitudinal direction selection push button 11
selects whether to perform steering or forward/backward adjustment.

The numeric keypad setting push button 15 is pressed when the input of the register correction amount is completed.

Buffer circuits 17 and 18 are CPU circuits and CPU
It acts as a buffer between each circuit connected to the circuit.

The CPU circuit 19 checks the electrical signals of the unit selection push button 6, the driving direction selection push button 10, and the front/rear direction selection push button 11, and determines the adjustment motor to be driven, and also determines the potentiometer to be read, and sends it to the multiplexer circuit. Outputs selection signal.
The digital signal from the A/D circuit is processed, stored in an internal storage device as the current position, and output to the display 4. The corrected value input from the numeric keypad and the stored current position are calculated, and this is stored as the target position. Furthermore, a drive signal to the adjustment motor is output to the relay circuit so that the current position matches the target position.

The I/F circuit 20 converts the digital signal from the A/D circuit into a clean digital signal.

A/D circuit 21 converts analog signals into digital signals.

The multiplexer circuit 22 outputs one of the analog signals from the plurality of potentiometers to the A/D circuit in response to a selection signal from the CPU circuit.

The relay circuit 23 selects a relay to drive the adjustment motor based on a signal from the CPU circuit.

If there is a color shift, it is necessary to move the plate cylinder from the current position to the target position.

The current position and new position of the plate cylinder are displayed in an absolute coordinate system whose origin is the mechanical origin position of the plate cylinder, that is, the arbitrarily determined reference position of the plate cylinder.

Here, the reference position is a position that is the origin when representing the position of the plate cylinder with respect to the printing machine, and is a position that is the origin of coordinates representing the rotational direction position and axial position of the plate cylinder with respect to the printing machine. The reference position of the plate cylinder may be arbitrarily determined within the adjustable range of each register. However, when the position of the plate cylinder relative to the printing press at a certain time to is taken as the reference position, the needle of the voltmeter M/M must be adjusted to 0 with respect to that reference position, and the potentiometer B The point must be adjusted so that it always overlaps with point A.

The current position of the plate cylinder refers to the position of the plate cylinder relative to the printing press at the present time, ie, at time t.

The target position of the plate cylinder is the position to which the plate cylinder should be moved to eliminate color misregistration.

The new position of the plate cylinder refers to the position of the plate cylinder at each time (t+Δt) after the plate cylinder starts moving until it reaches the target position. When the new position of the plate cylinder reaches the target position, the movement of the plate cylinder stops.

If the current position of the plate cylinder is different from the reference position,
A potential difference appears in the potentiometer. The reason for this is that the reference position of the plate cylinder can be determined arbitrarily as described above, and it does not necessarily match the target position of the plate cylinder for preventing color misregistration.
This is to adjust so that the potentiometer movable portion B overlaps the intermediate point A when the plate cylinder is at the reference position. However, if the current position of the plate cylinder differs from the reference position, a potential difference will occur between the intermediate point A of the potentiometer and the movable part B. And the potential difference obtained by the potentiometer is
It is converted into a digital value by the A/D circuit 21,
It is taken into the CPU circuit and stored in the storage device within the CPU circuit.

The register adjustment work is carried out by the driving direction adjustment motor 27 and the front-rear direction adjustment motor 30 of the printing unit 3.
This is the work of outputting a drive signal to the plate cylinder and moving the plate cylinder from the position of the plate cylinder where color misregistration occurs to the position of the plate cylinder where no color misregistration occurs.

Therefore, the position of the plate cylinder 25 is indicated on the digital display 4 by receiving signals from the steering direction potentiometer 28 and the front-rear direction potentiometer 31.
Alternatively, it is displayed using a - sign and numbers.

The driving direction potentiometer 28 and the longitudinal direction potentiometer 31 each have a middle point A at 1/2 of the total resistance, and a movable portion B that can slide over the entire resistance value range. The movable part B is adjusted so that the potential difference occurring between the intermediate point A and the movable part B becomes zero with respect to the reference position of the plate cylinder. In this way, the reference position in the driving direction and the front-rear direction of the plate cylinder 25 is set, and the plate cylinder and the potentiometer are connected through each gear device.

The code indicating the position of the plate cylinder in the driving direction is plate cylinder 2.
5 moves in the steering direction C, the movable part B of the potentiometer 28 for the steering direction moves in the D direction, and when the movable part B is in the D direction from the intermediate point A position, it is +. , conversely, the plate cylinder 25 is in the drive direction E.
When moving to, the steering direction potentiometer 2
The movable part B of 8 moves in the F direction, and when the movable part B is in the F direction from the position of the intermediate point A, it is set as -.

The code indicating the plate cylinder position in the front and back direction is plate cylinder 2.
5 rotates in the paper passing direction, that is, in the forward direction G, the movable part B of the front-back potentiometer 31 moves in the H direction, and the movable part moves in the H direction from the intermediate point A position. When the plate cylinder 25 rotates in the opposite direction to the paper passing direction, that is, in the backward direction, the movable part B of the front-back potentiometer 31 moves in the J direction. and when the movable part B is in the J direction from the position of the intermediate point A, it is set as -.

The number indicating the position of the plate cylinder in the driving direction is from the midpoint A of the driving direction potentiometer 28 to the movable part B.
The numbers indicating the position of the plate cylinder in the front-rear direction are digitally displayed as amounts obtained by converting the potential difference between the intermediate point A of the front-back potentiometer 31 and the movable part B into the amount of movement of the plate cylinder 25. Display on container 4.

The display of the plate cylinder position in the driving direction and the front-back direction is switched and displayed by pressing either the driving direction selection push button 10 or the front-back direction selection push button 11 on the operation panel 1.

To move the position of the plate cylinder, press the control
A drive signal for forward or reverse rotation is output from the CPU circuit 19 to the adjustment motors 27 and 30 through the buffer circuit 18 and relay circuit 23.

In order to display the current position of the plate cylinder, first the analog signals from the potentiometers 28 and 31 are passed through the multiplexer circuit 22 to the A/D circuit 2.
1, and the A/D circuit 21 converts the current position signal of the plate cylinder into a digital value. By inputting this digital value to the buffer circuit 18 through the I/F circuit 20 and outputting it from the CPU circuit 19 to the digital display 4 through the buffer circuit 17, the coordinate values of the current position of the plate cylinder are displayed.

Hereinafter, the registration adjustment work by operating the numeric keypad 7 will be explained regarding the overrun processing of the plate cylinder of this apparatus.

The directions in which the plate cylinder is moved during register adjustment work include steering direction C, driving direction E, forward direction G, and backward direction I, but the action of this device is substantially the same in all directions, so this is a typical example. The case where the plate cylinder 25 is moved in the operating direction C will be described below.

When you press the steering direction selection pushbutton 10 on the operation panel,
The coordinate value of the current position of the plate cylinder in the driving direction is displayed on the display. In the embodiment, "+123" is displayed as the coordinate value of the current position.

(1) When the number corresponding to the printing unit 3 whose register is to be adjusted is pressed on the unit selection push button 6, the electrical signal from the unit selection push button 6 is inputted to the CPU circuit 19 through the buffer circuit 17.

(2) When the steering direction selection push button 10 is pressed, the electric signal from the steering direction selection push button 10 is sent to the buffer circuit 17.
It is input to the CPU circuit 19 through.

(3) The CPU circuit 19 checks the electric signals of the unit selection push button 6 and the driving direction selection push button 10, and sends an electric signal to the multiplexer circuit 22 through the buffer circuit 18 to select the driving direction potentiometer 28. Output.

(4) The multiplexer circuit 22 inputs the potential difference generated in the potentiometers for the driving and front-back directions of all printing units, and inputs the potential difference generated in the driving direction of the printing unit 3 specified by the electric signal in item 3 above. Potentiometer voltage to A/D circuit 21
Output to.

(5) A/D circuit 21 receives A/D from CPU circuit 19.
Multiplexer circuit 22 by D conversion control signal
The analog signal, which is the output voltage of the converter, is converted into a digital signal and output to the I/F circuit 20.

(6) The I/F circuit 20 converts the dirty digital signal into a clean digital signal and inputs it to the CPU circuit 19 through the buffer circuit 18.

(7) The CPU circuit 19 processes the clean digital signal and displays the current position of the plate cylinder on the digital display 4 using codes and numbers. The display of the driving direction and the position of the plate cylinder in the front-back direction can be done using the driving direction selection push button 10 or the front-back direction selection push button 1 on the operation panel 1.
Press either 1 to switch the display.

(8) Assume that the current position of the plate cylinder in the driving direction is displayed on the digital display 4 as "+123".
This shows a case where the current position before the registration correction in the driving direction of the plate cylinder is +1.23 mm with respect to the reference position. Since the display is in 1/100mm increments, "+
123" is displayed.

(9) Move the plate cylinder position from this current position to the operating direction C by 0.05
Consider the case where you need to move mm correction.

(10) First, the target position setting device, that is, the numeric keypad 7
Press button 5. Then, the digital display 4 will show the current position "+123" that was displayed until now.
A correction value of 5 is displayed instead. This display continues until the numeric keypad setting push button 15 is pressed.

(11) The correction value 5 set using the numeric keypad is converted into an electrical signal and input to the CPU circuit 19 through the buffer circuit 17.

(12) The CPU circuit 19 outputs the set correction value to the digital display 4 through the buffer circuit 17. At that time, "+5" appears on digital display 4.
is displayed. Thereafter, by pressing the numeric keypad setting push button 15, the coordinate values of the new position of the moving plate cylinder can be displayed on the display 4. However, "+128" indicating the coordinate value of the target position
cannot be displayed.

(13) When the numeric keypad setting push button 15 is pressed, the electrical signal is sent to the CPU circuit 1 through the buffer circuit 17.
9. Then, the CPU circuit 19 calculates the sum (combined value) of the electrical signal "+123" indicating the coordinate value of the current position of the plate cylinder 25 before register correction and the electrical signal of the correction value 5 from the numeric keypad 7, and stores it. , the electrical signal corresponding to the result of the calculation, that is, the composite value "+128" is held until the plate cylinder 25 reaches the coordinate value "+128" of the target position from the coordinate value of the current position. This "+128" is overwritten when a new target value is input after the registered position becomes the target position.

At the same time, the CPU circuit 19 processes the electric signals from the unit selection push button 6, the driving direction selection push button 10, and the numeric keypad 7, and sends the electric signals so that the driving direction adjustment motor 27 moves the plate cylinder 25 in the steering direction C. It is output to the relay circuit 23 through the buffer circuit 18.

(14) The relay circuit 23 selects the relay based on the output signal of the CPU circuit 19, and the plate cylinder 25 is operated in the operating direction C.
The steering/driving direction adjustment motor 27 is driven so as to move the steering direction.

(15) As the driving direction adjustment motor 27 rotates, the changing coordinate values of the new position of the plate cylinder are displayed moment by moment on the digital display 4.

(16) The CPU circuit 19 inputs the preset overrun distance of the plate cylinder 25, and sets the preset value before the electric signal from the steering direction potentiometer 28 becomes equal to the held value "+128" of the CPU circuit. In anticipation of the overrun distance of the plate cylinder, the drive signal to the steering direction adjustment motor 27 is stopped as shown in FIGS. 5 and 6.

In the case shown in FIG. 5 or 6 a, the plate cylinder 25 moves (overruns) together with the adjustment motor 27 due to inertia, and the electrical signal from the driving direction potentiometer 28 is transmitted to the CPU circuit. It stops when it matches the held value of 19 "+128".

If, as shown in b and c in FIGS. 5 and 6, the plate cylinder 25 moves due to inertial force (overrun), the electrical signal from the steering direction potentiometer 28 will change to the value held by the CPU circuit 19. +128"
If they do not match, the CPU circuit 19 controls the operation so that the plate cylinder 25 rotates in the forward direction as shown in FIG. 5d or in the reverse direction as shown in FIG. 5e. A signal for driving the direction adjustment motor 27 is output to bring the plate cylinder 25 into alignment with the coordinate value "+128" of the target position.

(17) When the position of the plate cylinder 25 matches the target position,
The coordinate values of the position of the plate cylinder 25 are displayed on the digital display 4.
"+128" is displayed. Inching is CPU circuit 1
This is done by intermittent driving signals to the adjustment motors 27 and 30, which are output from the relay circuit 23 through the buffer circuit 18. In other words, as shown in Fig. 6b, when the plate cylinder stops short of the target position, by sending an intermittent forward rotation signal to the adjustment motor, the plate cylinder is moved in increments and brought quickly to the target position. . On the other hand,
When the plate cylinder passes the target position and stops as shown in FIG. 6c, by sending an intermittent reverse rotation signal to the adjustment motor, the plate cylinder is moved in increments to quickly bring it into alignment with the target position.

A constant speed motor is used as the adjustment motor, and switching between constant speed and inching is performed by adjusting input time.

The overrun distance is set in advance based on a value measured through practical tests. However, exact values are not required.

Since the plate cylinder is positioned by inching after the drive signal to the adjustment motor is temporarily stopped before the target position, the overrun distance that should be set in advance does not have to be an exact distance. When the plate cylinder stops due to its movement due to inertia force, the position where the plate cylinder stops coincides with the target position (a in Figure 5).
There are cases in which they do not match (b and c in Figure 5).The determination of whether they match or not is made by comparing the electrical signal from the potentiometer with the value held by the CPU circuit.Then, "If they do not match," it operates by inching so that they match immediately.

Therefore, there is no need for the operator to adjust the register while pressing the push button and looking at the display on the potentiometer. Therefore, the operator's time required for register adjustment work can be saved and efficiency can be improved.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

(1) The overrun distance of the plate cylinder due to inertia is set in advance, and the register adjustment motor is operated until the plate cylinder reaches the target position minus the overrun distance before the electric signal from the detector becomes equal to the set value. By driving the plate cylinder at a constant speed, and then allowing it to overrun due to inertia, the plate cylinder is moved in increments until the electrical signal from the detector matches the above set value. Accurate position adjustment of the plate cylinder can be done in a short time.

(2) Therefore, it is possible to improve the efficiency of register adjustment work and, by extension, the efficiency of printing work.

(3) The value of the overrun distance of the plate due to inertia that should be set in advance does not need to be an accurate value. Therefore, even if the overrun distance differs depending on the printing unit or printing press, there is no need to calculate each value, and when assembling or adjusting the machine, the overrun distance can be calculated for each printing unit or printing press. Measure and
No need to configure.

(4) If the overrun distance changes due to changes in the load applied to the motor, wear of the mechanism, changes in the level of lubrication, etc., the accuracy of positioning will decrease with devices that do not have an inching mechanism, and the overrun distance will change. However, with the device of the present invention, accurate alignment can be achieved without readjustment.

(5) Since the device of this application is composed of an inexpensive constant speed motor and a relay circuit, it is much cheaper than devices that use expensive servo motors etc. to perform accurate positioning. can be realized.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing a register adjustment device of a known printing press, FIG. 2 is a front view of the voltmeter shown in FIG. 1, and FIG.
4 is a front view showing the operation panel of FIG. 3, and FIGS. 5 and 6 show the movement of the plate cylinder according to FIG. 3. FIG. 1... Operation panel, 2... Control unit, 3... Printing unit, 4... Digital display, 5... Color magnet, 6... Unit selection push button, 7... Setting device (numeric keypad), 8 ...Steering direction zero point return push button, 9...
... Longitudinal direction zero point return push button, 10 ... Driving direction selection push button, 11 ... Longitudinal direction selection push button, 12 ... Forward rotation direction fine adjustment push button, 13 ... Fine adjustment switching push button, 1
4...Push button for fine adjustment of the reverse direction, 15...Push button for setting the numeric keypad, 16...Stop push button, 17, 18...
Buffer circuit, 19... CPU circuit, 20...
I/F circuit, 21... A/D circuit, 22... multiplexer circuit, 23... relay circuit, 24...
Fine adjustment setting device, 25... Plate cylinder, 26... Steering and driving direction gear device, 27... Steering and driving direction adjustment motor, 28
. . . pontensiometer for steering and driving direction, 29 . . . longitudinal gear device, 30 . . . motor for longitudinal adjustment, 31 . . . pontensiometer for longitudinal direction.

Claims (1)

[Claims] 1. An adjustment motor with a slight inching mechanism that moves the plate cylinder in the rotational direction or axial direction, and coordinates of the rotational position of the plate cylinder in an absolute coordinate system whose origin is an arbitrarily determined reference position of the plate cylinder. A plurality of printing units are each equipped with a detection circuit for detecting the value and the coordinate value of the axial position, and the detected values of each of the printing units are stored as digital quantities, and by pressing a selection button, the current state of the plate cylinder can be determined. A display circuit that digitally displays position data, a setting device that sets the coordinate values of the target position of the plate cylinder, and a preset overrun distance of the plate cylinder are input, and the electrical signal from the detector is equal to the set value. The adjustment motor is driven at a constant speed until the plate cylinder reaches the target position minus the overrun distance, and after that, overrun is caused by inertia, and then the electric signal from the detector is adjusted to the above setting. A register adjustment device for a printing press, comprising: an adjustment circuit that increments until the register matches a value.