JP3686296B2 - Ink pump operation control method and apparatus for printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink pump operation control method and apparatus in a printing press that prevents ink sticking to the ink pump used in the printing press.
[0002]
[Prior art]
An operation method of an ink pump that supplies ink used for a printing machine or the like will be described with reference to a cross-sectional view of the printing unit in FIG. 9, a side view of the printing unit in FIG. 10, and a front view of the entire newspaper rotary press in FIG.
As shown in FIG. 11, the newspaper rotary press 1 has a multi-page configuration, and in order to perform printing such as arrangement of multi-color pages on an arbitrary page, the front and back 1-color unit 2, the front and back 4-color unit 3, The front 4 color back 1 color unit 4, the front 4 color back 2 color unit 5, etc. are provided, and a paper feeding device 27 is arranged so that the web 8 can be supplied to each.
[0003]
Then, after the web 8 printed by the printing units 2, 3, 4, and 5 is transported and page-configured by the web transport unit 6, it is introduced into the folding machine 7, and the one folded and cut by the folding machine 7 is discharged. It is transported to a counting and packing department (not shown).
The ink supplied from the ink pump unit 9 is supplied to the printing plate mounted on the plate cylinder 11 through the ink roller group 10 as shown in FIGS. 9 and 10. Then, the ink adhering to the pattern of the printing plate is transferred to the surface of the blanket cylinder 12 and transferred to the web 8 for printing.
[0004]
In general, as shown in FIG. 10, the web 8 has a width corresponding to four pages of a newspaper, and the ink pump unit 9 generally has a width of one page and one unit. The ink pump unit 9 includes eight ink pumps 15, and each pump 15 is driven by a stepping motor (not shown).
In newspaper printing, there are often operations that partially use several color units and operations that use half the width of the web 8 as usual. Therefore, in a color unit that is not used (for example, the asterisk in FIG. 11), the ink pump unit 9 attached thereto stops its operation.
[0005]
[Problems to be solved by the invention]
However, if the operation is stopped for a long time, the ink may solidify due to a change in the properties of the ink and the ink pump 15 may not move.
Conventionally, when the ink pump 15 stops moving, it is often noticed only after printing and knowing that no ink is attached. Accordingly, the ink pump 15 is cleaned after it is noticed, or the configuration of the printing unit to be used is changed. The printed matter printed at this time becomes waste paper, and in some cases, the printing is started after the ink pump 15 has been cleaned. This may cause a delay in printing and inconvenience the user. It was necessary to do work, and caused a great loss.
[0006]
Accordingly, the present invention has been made to solve the above-mentioned problems, and the frequency of ink sticking to the ink pump is reduced, and even if the ink is stuck, the lighter one can be quickly recovered, and the discovery of ink sticking It is an object of the present invention to provide an ink pump operation control method and apparatus for a printing press that speeds up the process and reduces loss.
[0007]
[Means for Solving the Problems]
The present invention relates to ink pump operation control method and apparatus in printing machines, the ink pump in a state not subjected to printing, the non-operational ink pump according fixation of the ink by operating an ink sticking prevention operation mode It is to prevent.
[0008]
The present invention uses a normal ink supply operation mode in which ink is supplied from an ink supply source to the ink roller side using an ink suction / discharge mechanism in the ink pump, and an ink sticking prevention operation in which the ink in the ink pump is swung. In an ink pump operation control method in a printing press equipped with an ink supply device capable of selectively switching between modes,
When the ink pump is not moving, the gist is to operate the ink suction / discharge mechanism in the ink adhering prevention operation mode to prevent the ink pump from being disabled due to ink adhering.
[0009]
The present invention includes a normal ink supply operation mode in which an ink pump itself having an ink suction / discharge mechanism supplies ink from the ink supply source to the ink roller side, and an ink sticking prevention operation mode in which the ink in the ink pump is swung. When the ink pump is not moving, the ink suction / discharge mechanism is operated to prevent ink sticking, so that the ink sticking is discovered before printing, so the discovery is quick, The ink pump has a low frequency of ink sticking, and can prevent the ink pump from being disabled due to the sticking of the ink.
[0010]
The first invention uses a normal ink supply operation mode in which ink is supplied from an ink supply source to the ink roller side using an ink suction / discharge mechanism in the ink pump, and an ink fixing that swings the ink in the ink pump. A plurality of ink supply devices capable of selectively switching between the prevention operation mode and operating only the ink pump of the first ink supply device used for printing in the ink supply device in the normal ink supply operation mode. In an ink pump operation control method in a printing press,
The ink pump of the second ink supply device not used for printing among the plurality of ink supply devices is operated in the ink sticking prevention operation mode to prevent the ink pump from being disabled due to ink sticking. To do.
[0011]
In the first invention, the ink pump itself having an ink suction / discharge mechanism is a normal ink supply operation mode in which ink is supplied from the ink supply source to the ink roller side, and an ink sticking prevention that oscillates the ink in the ink pump. The point that the operation mode can be selectively switched is the same as that of the first invention, but the ink pump of the first ink supply device used for printing operates in a normal ink supply, so that the ink flows. Since the ink pump of the second ink supply device that is not used for printing does not perform the normal ink supply operation, the ink in the ink pump is oscillated by performing the ink sticking prevention operation, The inability to drive is prevented.
[0012]
The ink suction / discharge mechanism includes a pressure variable means for changing the pressure in the ink pump, and ink sucked from the ink suction end by the pressure variable means from the ink pump to the ink suction end. Or having a swinging means that swings toward the ink discharge end,
It is also an effective means of the first invention that the ink sucked in the ink pump is swung.
[0013]
According to this technical means, the ink suction / discharge mechanism includes the pressure variable means and the swinging means, and the ink sucked into the ink pump by the pressure variable means is transferred from the ink pump into the ink pump by the swinging means. Since it swings toward the suction end or toward the ink discharge end, it is possible to prevent the ink from sticking.
[0014]
Further, the swinging means has a stepping motor for driving the ink pump, and the swinging operation corresponds to a section from the start of ink suction to the end of suction, or a section from the start of discharge to the end of discharge. It is desirable that the stepping motor be configured to reciprocate by a predetermined angle.
According to such technical means, there is no crossing between the suction process from the start of ink suction to the end of suction and the discharge process from the start of discharge to the end of discharge. Is not sent to the side.
[0015]
Further, the second invention is an ink capable of selectively changing the first ink suction / discharge operation and the second ink suction / discharge operation performed at a cycle earlier than the first ink suction / discharge operation. A plurality of ink supply devices each having a pump are provided, and only the ink pump of the first ink supply device used for printing in the ink supply device is selectively driven by the first ink suction / discharge operation. In an ink pump operation control method in a printing machine that supplies ink,
The ink pump of the second ink supply device not used for printing among the plurality of ink supply devices is driven by the second ink suction / discharge operation to operate in the ink sticking prevention operation mode, and the ink sticking The ink pump is prevented from being disabled due to the above.
[0016]
The second invention has an ink pump capable of selectively varying the first ink suction / discharge operation and the second ink suction / discharge operation performed at a cycle earlier than the first ink suction / discharge operation. Then, only the ink pump of the first ink supply device used for printing is operated by the first ink suction / discharge operation to supply ink in normal printing, and the second ink supply device not used for printing The second ink suction / discharge operation is performed at a faster cycle than the first ink suction / discharge operation.
That is, by allowing a very small amount of ink to be discharged, the stepping motor that drives the ink pump is rotated in one direction at a cycle earlier than the first ink suction / discharge operation, or a very small amount of ink is discharged. Allowing the amount, the stepping motor for driving the ink pump is repeatedly driven in one direction and the reverse direction at a period earlier than the first ink suction / discharge operation.
[0017]
According to such a technique, for example, as shown in FIG. 6B, the sticking prevention operation is set to a cycle that allows a very small discharge amount in consideration of the printing operation time, thereby allowing a very small discharge amount of ink. Thus, the ink sticking prevention motion mode can be performed, so that the sticking of ink can be prevented.
[0018]
In addition, when the movement of the ink pump is observed and a drive command signal is output to the stepping motor that drives the ink pump of the first ink supply device used for printing among the plurality of ink supply devices, the ink is supplied. It is also an effective means in the first, second, or third invention that the operation in the ink sticking prevention motion mode is performed when the pump is not moving.
Such technical means can prevent ink sticking even when the ink pump of the first ink supply device used for printing stops.
[0019]
In addition, when the movement of the ink pump is observed and a drive command signal is output to the stepping motor that drives the ink pump of the first ink supply device used for printing among the plurality of ink supply devices, the ink is supplied. When the pump is not moving, the effective control in the first, second, or third invention is to increase the output of the stepping motor.
By such technical means, a light ink fixed state in the ink pump can be released and is effective.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
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, and are merely illustrative examples. Only.
[0021]
FIG. 1 is a block diagram of an ink pump operation control device in the printing press according to the present embodiment, FIG. 2 is a diagram for explaining an operation mode of the ink pump, FIG. 3 is a diagram of the ink pump, and FIG. FIG. 5 is a diagram illustrating the operation of the ink pump, FIG. 5 is a diagram illustrating the operation of the ink pump during the sticking prevention operation according to the first embodiment, and FIG. 6A is a diagram illustrating the operation during the sticking prevention operation according to the first embodiment. FIG. 6B is a time chart of the ink pump operation during the sticking prevention operation according to the second embodiment.
[0022]
In FIG. 1, the ink pump control device 28 has a CPU (central processing element) inside, and is configured to be able to select a page configuration to be printed, a color configuration, a selection setting of an ink pump device to be used, and the like. The operation mode of the ink pump can be selected and set based on the mode signal from the ink pump operation mode switching circuit 17.
[0023]
A motor drive circuit 13 that operates in accordance with a command from the ink pump control device 28 is connected. The motor drive circuit 13 drives a stepping motor 16 to control ink suction and discharge of the pump 15 that is operated by the motor 16. .
In addition, the power selector 19 is configured to control the motor drive circuit 13 and control the rotation speed of the motor 16 in accordance with a command from the ink pump control device 28 to control the amount of ink sucked and discharged by the ink pump 15.
[0024]
Here, the configuration of the stepping motor 16 and the ink pump 15 will be described. As shown in FIG. 3, a crank 25 is fixed to the rotation shaft of the stepping motor 16, and the ink pump 15 is disposed with an angle α with respect to the rotation axis of the stepping motor 16.
The barrel 23 formed in a cylindrical or prismatic shape in the ink pump 15 is provided with a columnar cavity 23a, and small-diameter ink paths 31, 32 orthogonal to the cavity 23a are provided. The ink path 32 is in contact with the ink fountain group 10 (FIG. 9).
[0025]
A plunger shaft 21 is inserted into the cavity 23 a so as to be able to rotate and slide. A pin 24 is implanted at the outer end of the plunger shaft 21, and the pin 24 is a universal joint provided on a crank 25 of the motor 16. 26, a valve cut portion 22 is provided on the inside of the cavity of the plunger shaft 21 and is cut so as to have a D cross section in a direction orthogonal to the shaft center.
[0026]
Since the ink pump 15 is configured as described above, the plunger shaft 21 rotates as the stepping motor 16 rotates, and at the same time, the stroke S reciprocates in the axial direction of the plunger shaft 21. As the plunger shaft 21 rotates and reciprocates in the axial direction, ink is sucked and discharged.
[0027]
That is, as shown in FIG. 4, the suction start (1), the suction (2), the suction end (3) and the direction of the valve cut portion 22 of the plunger shaft 21 become the direction of the suction port of the pump and the left direction of the drawing. The plunger shaft 21 moves. As a result, the distal end side of the plunger shaft 21 becomes negative pressure, and ink is sucked from the suction port, that is, the ink path 31, and ink is collected in the distal end cavity 23 a of the plunger shaft 21. Further, the plunger shaft 21 rotates, the discharge start (4), discharge (5), discharge end (6) and the direction of the valve cut portion 22 become the direction of the discharge port, and the plunger shaft 21 moves to the right in the figure. . As a result, the ink accumulated in the distal end cavity 23 a of the plunger shaft 21 is pressed, and the pressed ink is pushed out to the discharge port, that is, the ink path 32. This is repeated to supply ink.
[0028]
Now, as shown in FIG. 3, the sensor 18 is disposed at a position where the movable portion of the ink pump 15 can be visually recognized, which is a position where the crank 25 of the motor 16 can be observed. The sensor 18 may be any sensor that observes the movement of the ink pump 15 regardless of the magnetic type or the light reflection type.
Therefore, whether or not the pump 15 is operating is determined by the motion detection control circuit 14 according to the output change sent from the sensor 18 according to the rotation speed of the motor in each mode from the ink pump control device 28. It is determined whether or not the waveform is input at a predetermined pitch by molding.
[0029]
The sensor 18 is connected to the motion detection control device 14, the motion detection control device 14 is connected to the ink pump control device 28 and the timer 20, and the timer 20 is connected to the ink pump control device 28.
Then, the timer 20 judges the movement of the pump after the drive signal of the motor drive circuit 13 that operates according to the command of the ink pump control device 28 in the ink supply movement mode, and starts measuring time when the pump is not moving. The time is sent to the ink pump controller 28.
Further, the timer 20 judges the movement of the pump after the drive signal of the motor drive circuit 13 that operates according to the command of the ink pump control device 28 in the sticking prevention movement mode, and starts measuring time when the pump is not moving. The time is sent to the ink pump controller 28.
[0030]
The ink pump control device 28 is connected to the machine stop device 29 and the alarm device 30. When the movement of the ink pump 15 cannot be detected within a specified time, the machine stop device 29 is driven to stop the printing press. The alarm device 30 is configured to output an alarm indicating the ink fixing state to the alarm device 30.
[0031]
In the case of an ink pump used for operation, the mode signal from the ink pump operation mode switching circuit 17 is handled by the ink pump 15 as shown in FIG. Ink pump control device as a rotation speed N for rotating the stepping motor 16 based on the initial setting for making the discharge amount according to the line drawing rate of the printed pattern of the portion and the rotation degree B determined from the adjustment value by the micro adjustment operation by the operator The ink is sent to 28 and stored, and an appropriate amount of ink corresponding to the pattern and speed is discharged as in the prior art.
The rotation speed N of the stepping motor 16 is N = Max rotation speed × A × B, and the ink pump 15 is operated.
[0032]
In the case of an ink pump that is not used for operation, as shown in FIGS. 2B and 2C, it is sent to and stored in the ink pump control unit 28 as an anti-sticking operation mode in which an anti-sticking operation is performed.
That is, if the input to the stepping motor drive circuit 13 in FIG. 2B is driven by a command system having a constant rotational speed that is independent of the line rate and speed, “a” is selected, or FIG. When “C” is selected, the anti-sticking operation mode in which the operation cycle T, the direction of rotation, the rotation angle θ, the duration t, etc. are set as shown in FIG. 6 (a) or (b) Become.
[0033]
By the way, in a typical operation method of the sticking prevention operation, the direction of the valve cut portion 22 of the plunger shaft 21 described above is not applied to both the suction port and the discharge port as shown in FIGS. Such a range (± θ range) is repeatedly rotated to operate as shown in FIG.
As another method, a slight ink discharge is recognized, and the plunger shaft 21 is rotated in the same direction for a very short time at a specific period, as shown in FIG. 6B, or slightly at a free position. You may make it rotate repeatedly for a long time.
[0034]
Next, the operation of the present embodiment configured as described above will be described with reference to the flowchart of FIG.
In the state where the power of the printing press operation is turned on and whether the ink pump 15 is used for the operation is determined in advance by the selection command, the ink pump 15 used for the operation and the ink pump 15 not used for the operation are operated. Is changing the way.
That is, in the case of the ink pump used for the operation (50), the ink supply operation mode (51) is entered, and as shown in FIG. 2 (a), the rotation degree A determined by the function depending on the printing speed and the ink pump 15 The motor 16 is driven by the rotation speed N for rotating the stepping motor 16 based on the initial setting for setting the discharge amount in accordance with the line drawing rate of the print pattern of the portion to be handled and the rotation degree B determined from the adjustment value by the micro adjustment operation by the operator. Rotate and supply ink.
[0035]
This ink supply operation mode continues until the end of printing as long as the ink pump used for the operation is moving (52), but the ink pump used for the operation stops (52), and the ink not used for the operation. When it is a pump (50), it proceeds to the sticking prevention operation mode (53).
[0036]
When the ink pump used for operation stops (52), it enters into the sticking prevention operation mode (53), and it is judged again whether the pump is moving. If the pump is moving (54), In the case of the ink supply operation pump (55), the process returns to the ink supply operation mode (51) and printing is continued.
[0037]
If the pump is not moving in step (54), the pump drive power is increased (57). If the pump does not move after the specified time, it is checked again whether the pump is an ink supply operation pump. If the ink supply pump is determined (58), the printer is stopped and an alarm is issued (59).
[0038]
On the other hand, in step (50), if the ink pump is not used for operation, the process proceeds to the sticking prevention operation mode (53). If the pump is not operating, the timer 20 is activated to start timing (54). If the pump drive power is increased (57) and the pump does not move after the specified time, it is determined again whether it is an ink supply operation pump (58). The pump operation is stopped and an alarm is issued (60).
[0039]
As described above in detail, in the present embodiment, in the ink pump 15 that performs the ink supply operation, if the ink pump 15 is not fixed, the ink supply operation is continued. If the ink pump 15 is fixed, the ink pump 15 is fixed. The pump 15 is detected to be stuck by the sensor 18, starts the sticking prevention operation, and operates with power-up. However, if the pump 15 still does not move within the specified time, the printer is stopped and an alarm is issued. Can be fixed by this operation, and if it is not corrected, the fixation is found before operation, so the machine is stopped, the machine configuration is changed, the printing paper path is changed and the operation is performed, or the ink pump 15 is disassembled. Can be cleaned.
[0040]
Accordingly, the frequency of inoperability due to sticking is reduced, and even if sticking occurs, it is found before printing, so that paper waste due to printing can be reduced, time waste is reduced, and time is required for changing the printing configuration and cleaning the pump 15. Can be allocated, productivity can be improved, and costs can be reduced.
[0041]
Further, the ink pump 15 that does not supply ink is set to a sticking prevention operation mode, and is sometimes operated so as not to stick without discharging ink, so that it is not necessary to clean by ink discharge, and the frequency of sticking is reduced. Even if the sticking occurs, the power selector 19 drives the stepping motor 16 with a high output, so that the light sticking can be eliminated and the frequency of inoperability due to the sticking can be further reduced.
[0042]
In addition, the movement of the ink pump 15 can be detected by the sensor 18 so that the fixing state can be detected at an early stage, and the fixing frequency can be greatly reduced including the case of the above-described ink supply operation mode. Time can be reduced, productivity can be improved, and costs can be reduced.
[0043]
In addition, as shown in FIG. 6 (b), it is possible to perform a sticking prevention operation with an extremely small discharge amount in an operation cycle in consideration of the printing operation time. In this case, sufficient cleaning by the simultaneous cleaning after the printing operation is also possible. Since the discharge can be performed, the same effect can be obtained.
[0044]
FIG. 8 is an operation flow chart of the ink pump according to the second embodiment.
In the case of an ink pump (50) used for the operation when the printing press operation is turned on, the ink supply operation mode (51) is entered and ink is supplied.
[0045]
This ink supply operation mode continues until the end of printing as long as the ink pump used for operation is moving (52), but when the ink pump used for operation stops (52), the driving force of the pump is reduced. If the pump does not move after the specified time has elapsed (61), the printer is stopped and an alarm is issued (59).
If the ink pump is not used for operation (50), the process proceeds to the sticking prevention operation mode (53).
[0046]
If the pump is not moving, the timer 20 is activated to start timing (54), the driving force of the pump is powered up (57), and if the pump does not move after the specified time (56) ) Stops the ink pump operation and issues an alarm (60).
[0047]
In this embodiment, in the ink supply operation mode, when it is detected that the ink pump 15 is not moving, the machine operation may be immediately stopped and an alarm may be issued.
[0048]
In the second embodiment, the operation is performed in this way. Therefore, in the first embodiment described above, the ink pump 15 that supplies ink is operated by switching to the anti-sticking operation mode when detecting that the ink pump 15 is not moving in the ink supply operation mode. Instead, as shown in FIG. 8, the anti-sticking operation mode is not used, and the power is increased by increasing the excitation current of the stepping motor 16 within a specified time, and the operation is continued as it is. When the specified time is exceeded, the machine is stopped and an alarm is issued.
[0049]
As described above in detail, the second embodiment has the same effect as the first embodiment, and also has the effect of simplifying the system because the flow is simplified.
[0050]
【The invention's effect】
As described above in detail, the present invention reduces the frequency of ink sticking to the ink pump, recovers lighter ones even if they are stuck, and reduces the loss by speeding up the discovery of ink sticking. It is possible to provide an ink pump operation control method for a printing press.
[Brief description of the drawings]
FIG. 1 is a block configuration diagram of an ink pump operation control device in a printing press according to an embodiment.
FIG. 2 is a diagram illustrating an operation mode of an ink pump.
FIG. 3 is a configuration diagram of an ink pump.
FIG. 4 is an operation explanatory diagram of an ink pump.
FIG. 5 is an explanatory diagram of an ink pump operation during a sticking prevention operation according to the first embodiment.
6A is a time chart of the ink pump operation during the sticking prevention operation according to the first embodiment, and FIG. 6B is a time chart of the ink pump operation during the sticking prevention operation according to the second embodiment. FIG.
FIG. 7 is a flowchart according to the first embodiment.
FIG. 8 is a flowchart according to the second embodiment.
FIG. 9 is a cross-sectional view of a printing unit.
FIG. 10 is a side view of the printing unit.
FIG. 11 is an overall front view of a newspaper rotary press.
[Explanation of symbols]
1 Newspaper press 15 Ink pump 16 Stepping motor 21 Plunger

Claims (8)

Select the normal ink supply operation mode that supplies ink from the ink supply source to the ink roller side using the ink suction / discharge mechanism in the ink pump and the ink sticking prevention operation mode that swings the ink in the ink pump. Ink pump operation in a printing press having a plurality of ink supply devices that can be switched automatically and operating only the ink pump of the first ink supply device for printing in the ink supply device in the normal ink supply operation mode In the control method,
The ink pump of the second ink supply device not used for printing among the plurality of ink supply devices is operated in the ink sticking prevention operation mode to prevent the ink pump from being disabled due to ink sticking. Ink pump operation control method for a printing press. The ink suction / discharge mechanism includes a pressure variable means for changing the pressure in the ink pump and ink sucked from the ink suction end by the pressure variable means from the ink pump to the ink suction end or an ink Rocking means that rocks toward the discharge end,
2. The ink pump operation control method for a printing press according to claim 1, wherein the ink sucked in the ink pump is swung.   The swinging means has a stepping motor for driving the ink pump, and the swinging operation corresponds to a section from the start of ink suction to the end of suction, or a section from the start of discharge to the end of discharge. 3. The ink pump operation control method for a printing press according to claim 2, wherein the stepping motor is reciprocally rotated by a predetermined angle. A plurality of ink supply devices provided with an ink pump capable of selectively changing the first ink suction / discharge operation and the second ink suction / discharge operation performed at a cycle earlier than the first ink suction / discharge operation Ink in a printing press that supplies ink by selectively driving only the ink pump of the first ink supply device for printing in the ink supply device by the first ink suction / discharge operation In the pump operation control method,
The ink pump of the second ink supply device not used for printing among the plurality of ink supply devices is driven by the second ink suction / discharge operation to operate in the ink sticking prevention operation mode, and the ink sticking An ink pump operation control method in a printing press characterized by preventing the inability to operate the ink pump due to the ink.   By observing the movement of the ink pump, when the drive command signal to the stepping motor that drives the ink pump of the first ink supply device used for printing among the plurality of ink supply devices is generated, the ink pump 5. The ink pump operation control method for a printing press according to claim 1 or 4, wherein when not moving, the ink sticking prevention motion mode is operated.   By observing the movement of the ink pump, when the drive command signal to the stepping motor that drives the ink pump of the first ink supply device used for printing among the plurality of ink supply devices is generated, the ink pump 5. The ink pump operation control method for a printing press according to claim 1 or 4, wherein control is performed so as to increase the output of the stepping motor when it is not moving. Select the normal ink supply operation mode that supplies ink from the ink supply source to the ink roller side using the ink suction / discharge mechanism in the ink pump and the ink sticking prevention operation mode that swings the ink in the ink pump. In an ink pump operation control apparatus in a printing press that includes an ink pump control apparatus that switches automatically, and that operates only the ink pump of the first ink supply apparatus used for printing in the ink supply apparatus in the normal ink supply operation mode. ,
A motor drive circuit that operates according to a command from the ink pump control device;
A stepping motor that controls ink suction / discharge of the ink pump by the motor drive circuit ;
The ink pump control device operates an ink pump of a second ink supply device that is not used for printing in the plurality of ink supply devices in an anti-sticking operation mode. . An ink pump capable of selectively changing a first ink suction / discharge operation and a second ink suction / discharge operation performed at a cycle earlier than the first ink suction / discharge operation, and an operation mode of the ink pump A plurality of ink supply devices each having an ink pump control device for controlling the ink pump , wherein only the ink pump of the first ink supply device for printing is selectively used in the ink supply device. In an ink pump operation control device in a printing machine that is driven by a discharge operation and supplies ink,
A motor drive circuit that operates according to a command from the ink pump control device;
A stepping motor that controls ink suction / discharge of the ink pump by the motor drive circuit ;
The ink pump control device drives an ink pump of a second ink supply device that is not used for printing among the plurality of ink supply devices by the second ink suction / discharge operation in an ink sticking prevention operation mode. An ink pump operation control device for a printing press characterized by operating.

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