Control method and device of intermittent offset press, electronic equipment and storage medium

Abstract

Embodiments of the present application provide a control method and device for an intermittent offset printing machine, electronic equipment and a storage medium. The intermittent offset printing machine comprises a first driving roller and a second driving roller arranged at intervals along a first direction, and the first driving roller and the second driving roller are used to drive a to-be-printed sheet to move along a first direction or a second direction opposite to the first direction when the to-be-printed sheet is in contact. The method comprises: when the first driving roller and the second driving roller are controlled to rotate synchronously to drive the to-be-printed sheet to move along the first direction, the rotating speed of the second driving roller is controlled to be greater than the rotating speed of the first driving roller; and when the first driving roller and the second driving roller are controlled to rotate synchronously to drive the to-be-printed sheet to move along the second direction, the rotating speed of the first driving roller is controlled to be greater than the rotating speed of the second driving roller.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology, and in particular to a control method, device, electronic equipment and storage medium for an intermittent offset printing machine. Background Technology

[0002] Intermittent offset printing presses (also known as intermittent offset printing machines) differ from traditional rotary printing presses in that they can only be used to print patterns of fixed lengths. When printing on paper, intermittent offset presses can print patterns of different lengths without changing the printing rollers by reciprocating the paper's movement, ensuring controllable pattern spacing and effectively improving paper utilization. However, due to this characteristic of intermittent offset printing presses, the paper needs to move continuously in both directions during the printing process, and this reciprocating motion inevitably causes significant fluctuations in the paper's tension.

[0003] Currently, tension sensors are rarely installed on intermittent offset printing presses. One method of tension control involves setting the diameter of the paper feed roller (the drive roller in the paper feed direction that pulls the paper outwards) to a smaller than its actual diameter in the electrical configuration. This causes a slight overspeed of the paper feed roller, thereby maintaining tension. However, this method is prone to tension drop during pullback, which can affect print quality. Furthermore, modifications typically require stopping the intermittent offset printing press, significantly impacting equipment setup efficiency. Therefore, a new technical solution is needed to at least partially improve these technical problems. Summary of the Invention

[0004] To at least partially solve the above-mentioned technical problems, embodiments of this application provide a control method, apparatus, electronic device, and storage medium for an intermittent offset printing machine.

[0005] According to one aspect of the embodiments of this application, an embodiment of this application provides a control method for an intermittent offset printing machine, wherein the intermittent offset printing machine includes a first drive roller and a second drive roller spaced apart along a first direction, the first drive roller and the second drive roller being used to drive the sheet to be printed to move along the first direction or drive the sheet to be printed to move along a second direction opposite to the first direction when in contact with the sheet to be printed, the method comprising:

[0006] When controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the first direction, the rotational speed of the second drive roller is controlled to be greater than the rotational speed of the first drive roller; and,

[0007] When controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the second direction, the rotational speed of the first drive roller is controlled to be greater than the rotational speed of the second drive roller.

[0008] In some optional embodiments, controlling the first drive roller and the second drive roller to rotate synchronously includes controlling the first drive roller and the second drive roller to rotate synchronously in a variable speed manner.

[0009] In some optional embodiments, controlling the first drive roller and the second drive roller to achieve synchronous rotation in a variable speed manner includes: setting an electronic cam virtual axis and the main virtual axis of the intermittent offset printing machine, and setting the electronic cam virtual axis and the main virtual axis to maintain a cam synchronization relationship, wherein the main virtual axis is used to control the linear speed of the first drive roller and the second drive roller when driving the printable sheet to move along a first direction or a second direction; maintaining a gear synchronization relationship between the first drive roller and the electronic cam virtual axis with a first synchronization ratio, and maintaining a gear synchronization relationship between the second drive roller and the electronic cam virtual axis with a second synchronization ratio; and controlling the variable speed rotation of the electronic cam virtual axis to make the first drive roller rotate synchronously with the electronic cam virtual axis based on the first synchronization ratio, and to make the second drive roller rotate synchronously with the electronic cam virtual axis based on the second synchronization ratio, so that the first drive roller and the second drive roller achieve synchronous rotation in a variable speed manner.

[0010] In some optional embodiments, when the second synchronization ratio is greater than the first synchronization ratio, the rotational speed of the second drive roller is greater than the rotational speed of the first drive roller; and when the first synchronization ratio is greater than the second synchronization ratio, the rotational speed of the first drive roller is greater than the rotational speed of the second drive roller.

[0011] In some optional embodiments, when the printable sheet is driven to move along the first direction, controlling the rotational speed of the second drive roller to be greater than that of the first drive roller includes: determining and controlling the rotational speed of the first drive roller using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1; and determining and controlling the rotational speed of the second drive roller using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1 + a1, where a1 represents the first preset adjustment coefficient, 0 < a1. 1 < 1; or, when the printable sheet is driven to move along the first direction, controlling the rotational speed of the second drive roller to be greater than the rotational speed of the first drive roller includes: determining and controlling the rotational speed of the first drive roller using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1 - a2, where a2 represents the second preset adjustment coefficient, 0 < a2 < 1; and determining and controlling the rotational speed of the second drive roller using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1.

[0012] In some optional embodiments, when the printable sheet is driven to move along the second direction, controlling the rotational speed of the first drive roller to be greater than that of the second drive roller includes: determining and controlling the rotational speed of the first drive roller using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1; and determining and controlling the rotational speed of the second drive roller using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1 - a3, where a3 represents a third preset adjustment coefficient, 0 < a 3 < 1; or, when the printable sheet is driven to move along the second direction, controlling the rotational speed of the first drive roller to be greater than the rotational speed of the second drive roller includes: determining and controlling the rotational speed of the first drive roller using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1 + a4, where a4 represents the fourth preset adjustment coefficient, 0 < a4 < 1; and determining and controlling the rotational speed of the second drive roller using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1.

[0013] According to two other aspects of the embodiments of this application, the embodiments of this application provide a control device for an intermittent offset printing machine, wherein the intermittent offset printing machine includes a first drive roller and a second drive roller spaced apart along a first direction, the first drive roller and the second drive roller being used to drive the sheet to be printed to move along the first direction or drive the sheet to be printed to move along a second direction opposite to the first direction when in contact with the sheet to be printed, the device comprising:

[0014] A first control module is configured to, when controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the first direction, control the rotational speed of the second drive roller to be greater than the rotational speed of the first drive roller; and,

[0015] The second control module is used to control the rotational speed of the first drive roller to be greater than the rotational speed of the second drive roller when controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the second direction.

[0016] According to another aspect of the embodiments of this application, an electronic device is provided, including: a processor, a communication interface, a memory, and a communication bus. The processor, the communication interface, and the memory communicate with each other through the communication bus. The memory is used to store at least one executable instruction, which causes the processor to perform the operation corresponding to the control method of the intermittent offset printing machine provided in any of the first aspects.

[0017] According to another aspect of the embodiments of this application, the embodiments of this application provide a computer-readable storage medium storing computer instructions, which, when executed by a processor, cause the processor to perform the control method of the intermittent offset printing machine provided in any of the first aspects.

[0018] According to another aspect of the embodiments of this application, the embodiments of this application provide a computer program product, which is tangibly stored on a computer-readable medium and includes computer-executable instructions, which, when executed, cause at least one processor to perform the control method of the intermittent offset printing machine provided in any of the first aspects above.

[0019] The control scheme for the intermittent offset printing machine in this application embodiment allows for the control of the second drive roller to rotate at a speed greater than the speed of the first drive roller when controlling the first and second drive rollers to rotate synchronously to drive the printable sheet to move along a first direction. It also allows for the control of the first drive roller to rotate at a speed greater than the speed of the second drive roller when controlling the first and second drive rollers to rotate synchronously to drive the printable sheet to move along a second direction. The first and second drive rollers of the intermittent offset printing machine are used to drive the printable sheet to move along the first direction or in the opposite direction when in contact with the printable sheet. The second direction of movement allows the control scheme of this intermittent offset printing press to effectively maintain the tension of the printing sheet (e.g., printing paper) during reciprocating motion along the first and second directions. This stabilizes the tension of the printing sheet and prevents a decrease in tension during pull-back, thus improving printing quality. Furthermore, this scheme eliminates the need to stop and modify the intermittent offset printing press during operation, avoiding reduced equipment debugging efficiency. Attached Figure Description

[0020] The accompanying drawings are intended only to illustrate and explain this application and do not limit the scope of this application.

[0021] Figure 1 An optional schematic diagram of an intermittent offset printing machine according to an embodiment of this application is shown.

[0022] Figure 2 An optional flowchart of a control method for an intermittent offset printing machine according to an embodiment of this application is shown.

[0023] Figure 3 A flowchart of an optional sub-step of "controlling the first drive roller and the second drive roller to achieve synchronous rotation in a variable speed manner" is shown in an embodiment of this application.

[0024] Figure 4 An optional block diagram of the control device for an intermittent offset printing machine according to an embodiment of this application is shown.

[0025] Figure 5 A schematic diagram of the structure of an optional electronic device according to an embodiment of this application is shown.

[0026] Figure label:

[0027] 100. Intermittent offset printing press; 101. First drive roller; 102. Second drive roller; 103. Unwind roller; 104. Rewind roller; 105. Feed roller; 106. Output roller; 1071. Printing rubber roller; 1072. Printing impression roller; 1073. Printing plate roller; 1011. Feed pressure roller; 1021. Output pressure roller; 200. Sheet to be printed; F1. First direction; F2. Second direction; 400. Control device for intermittent offset printing press; 401. First control module; 402. Second control module; 500. Electronic equipment; 502. Processor; 504. Communication interface; 506. Memory; 508. Communication bus; 510. Program. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0029] Intermittent offset printing presses (also known as intermittent offset printing machines) differ from traditional rotary printing presses in that they can only print patterns of fixed lengths. When printing on paper, intermittent offset presses can print patterns of different lengths without changing the printing rollers by reciprocating the paper, ensuring controllable pattern spacing and effectively improving paper utilization. However, due to this characteristic, the paper needs to move continuously in both directions during printing, inevitably causing significant fluctuations in paper tension. Currently, tension sensors are rarely installed on intermittent offset presses. One method of tension control involves setting the diameter of the paper feed roller (the drive roller in the paper feed direction, used to pull the paper outwards) to a lower than its actual diameter in the electrical configuration, causing a slight overspeed of the paper feed roller to maintain tension. However, this method easily leads to a drop in tension during pullback, which can affect print quality. Furthermore, modifications typically require stopping the intermittent offset press, significantly impacting equipment debugging efficiency.

[0030] To at least partially improve such technical problems, this application provides a control method for an intermittent offset printing machine. This control method can be executed by a computer device capable of data processing. The computer device may include one or more processing units, such as a CPU, MCU, PLC, etc. Alternatively, the control method can also be executed and data processed based on a cloud system, edge computing system, etc. It should be understood that no limitation is made in this regard in the embodiments of this application.

[0031] Before describing the control method of the intermittent offset printing machine in detail, a brief description of the composition structure of an optional intermittent offset printing machine of this application will be given first. Figure 1 An optional schematic diagram of an intermittent offset printing machine according to an embodiment of this application is shown. (Refer to...) Figure 1 As shown, the intermittent offset printing machine 100 includes a first drive roller 101 and a second drive roller 102 spaced apart along a first direction F1. The first drive roller 101 and the second drive roller 102 are used to drive the printable sheet 200 to move along the first direction F1 or drive the printable sheet 200 to move along a second direction F2 opposite to the first direction F1 when in contact with the printable sheet 200.

[0032] Optionally, the sheet to be printed 200 can be printing paper or other sheet-like objects that can be used for printing. This application does not impose any restrictions on this. For the sake of illustration, the sheet to be printed 200 is used as printing paper for the purpose of illustration.

[0033] Optionally, the first drive roller 101 can serve as a paper feed roller, and the second drive roller 102 can serve as a paper output roller. The first drive roller 101 can be driven to rotate by one drive motor, and the second drive roller 102 can be driven to rotate by another drive motor. When the sheet to be printed 200 contacts the first drive roller 101 and the second drive roller 102, the first drive roller 101 and the second drive roller 102 rotate to drive the sheet to be printed 200 to move along the first direction F1 or the second direction F2, thereby realizing the function of the intermittent offset printing press 100 to make the sheet to be printed 200 (e.g., printing paper) reciprocate during the printing process.

[0034] Optionally, refer to Figure 1 The example briefly illustrates an alternative structure and operating process of the intermittent offset printing press 100. Structurally, the intermittent offset printing press 100 includes an unwinding unit, a paper feeding and storage unit, a paper feeding and pulling unit, a paper output and pulling unit, a paper output and storage unit, a rewinding unit, and multiple printing units. (Refer to...) Figure 1 For example, the entire working line of the intermittent offset printing machine 100 runs along the first direction F1 (e.g. Figure 1 The middle direction is from left to right (but this is not intended to limit this application), and can be along the second direction F2 (e.g. Figure 1 The reciprocating motion is from right to left (but this is not intended to limit the scope of this application). The unwinding unit may include an unwinding roller 103, which provides unwinding power to the sheet to be printed 200 (e.g., printing paper). One end of the sheet to be printed 200 is connected to the unwinding roller 103. Optionally, the unwinding roller 103 may be part of a magnetic powder clutch or a separate power roller (e.g., driven by a drive motor). The winding unit may include a winding roller 104, which provides winding power to the sheet to be printed 200 (e.g., printing paper). The other end of the sheet to be printed 200 is connected to the unwinding roller 103. Optionally, the winding roller 104 may be part of a magnetic powder clutch or a separate power roller (e.g., driven by a drive motor). The paper feeding and storage unit may include a paper feeding moving roller 105, which can move up and down (see reference). Figure 1 (as indicated by the double arrows on the left) is used to change the uniform speed motion of the print sheet 200 from a variable speed motion, thus buffering the print sheet 200; the paper output and storage unit may include a paper output moving roller 106, which can move up and down (see reference). Figure 1(In the direction indicated by the double arrows on the right) is used to change the uniform speed motion of the sheet to be printed 200 to a variable speed motion, thus buffering the sheet to be printed 200; the paper feeding and pulling unit may include a first drive roller 101 and a paper feeding pressure roller 1011, which are located on both sides of the sheet to be printed 200. The paper feeding pressure roller 1011 presses on the sheet to be printed 200 so that the sheet to be printed 200 can contact the first drive roller 101 more stably; the paper output and pulling unit may include a second drive roller 102 and a paper output pressure roller 1021, which are located on both sides of the sheet to be printed 200. The paper output pressure roller 1021 presses on the sheet to be printed so that the sheet to be printed 200 can contact the first drive roller 101 more stably; The printing sheet 200 can contact the second drive roller 102 more stably; the first drive roller 101 can serve as a paper feed roller, and the second drive roller 102 can serve as a paper output roller. The rotation of the first drive roller 101 and the second drive roller 102 can pull the printing sheet 200 back and forth along a first direction F1 and a second direction F2 opposite to the first direction F1 during the printing process of the intermittent offset printing press 100. This allows the printing sheet 200 to be driven to move along the first direction F1 or along the second direction F2 opposite to the first direction F1 when both rollers contact it, thereby achieving the function of reciprocating motion of the printing sheet 200 (e.g., printing paper). (e.g., see reference...) Figure 1 In the example shown, clockwise rotation of the first drive roller 101 and the second drive roller 102 moves the printing sheet 200 in the first direction F1, and counterclockwise rotation of the first drive roller 101 and the second drive roller 102 moves the printing sheet 200 in the second direction F2; multiple printing units (see reference) Figure 1 The example shown (a total of 5, which is not intended to be a limitation) includes a printing rubber roller 1071, a printing impression roller 1072, and a printing plate roller 1073. The printing rubber roller 1071 is used to contact the sheet to be printed 200 during the printing process and print ink onto the sheet to be printed 200. The printing impression roller 1072 is used to contact the sheet to be printed 200 during the printing process so that the sheet to be printed 200 can make more stable contact with the printing rubber roller 1071, thus completing the printing function. It should be understood that the structure of this intermittent offset printing machine 100 is not intended to be a limitation on the embodiments of this application.

[0035] Referring to the above Figure 1The intermittent offset printing machine 100 operates as follows: The sheet to be printed 200 (e.g., printing paper) is output at a constant speed from the unwinding unit (output from the unwinding roller 103 of the unwinding unit), enters the paper feeding and storage unit, and changes the linear velocity of the sheet to be printed 200 through the movement of its paper feeding moving roller 105. Then, it enters the printing interval between the first drive roller 101 and the second drive roller 102. The first drive roller 101 and the second drive roller 102 drive the paper to move back and forth along the first direction F1 and the second direction F2, ensuring that the ink on the printing roller 1071 is stably printed on the sheet to be printed 200, and at the same time ensuring that the tension of the sheet to be printed 200 is stable during the back and forth movement. After passing the second drive roller 102, the sheet to be printed 200 enters the paper output and storage unit. Changes the linear velocity of the sheet to be printed 200 to a constant speed through the movement of its paper output moving roller 106. Finally, the sheet to be printed 200 enters the winding unit (wound by the winding roller 103 of the winding unit). It should be understood that this working process is not intended to limit any aspect of the embodiments of this application.

[0036] The following section will provide a detailed explanation of each step of the control method for the intermittent offset printing machine of this application.

[0037] Figure 2 An optional flowchart of a control method for an intermittent offset printing press according to an embodiment of this application is shown. According to a first aspect of an embodiment of this application, referring to… Figure 2 The flowchart in this application illustrates a control method for an intermittent offset printing machine, which includes the following steps S201 and S202:

[0038] S201: When controlling the first drive roller 101 and the second drive roller 102 to rotate synchronously to drive the printable sheet 200 to move along the first direction F1, the rotational speed of the second drive roller 102 is controlled to be greater than the rotational speed of the first drive roller 101.

[0039] S202: When controlling the first drive roller 101 and the second drive roller 102 to rotate synchronously to drive the printable sheet 200 to move along the second direction F2, the rotation speed of the first drive roller 101 is controlled to be greater than the rotation speed of the second drive roller 102.

[0040] Based on this, the control method for the intermittent offset printing machine in this application allows for the control of the second drive roller to rotate synchronously with the first and second drive rollers to drive the printable sheet to move along the first direction, while simultaneously controlling the first and second drive rollers to rotate synchronously with the first drive rollers to drive the printable sheet to move along the second direction, ensuring that the first drive roller's rotational speed is greater than the second drive roller's rotational speed. Furthermore, the first and second drive rollers of the intermittent offset printing machine are used to drive the printable sheet to move along the first direction or along a direction parallel to the first direction when in contact with the printable sheet. The intermittent offset printing press control method of this application can effectively maintain the tension of the printing sheet (e.g., printing paper) during reciprocating motion along the first and second directions when printing on the printing sheet using the intermittent offset printing press. This ensures stable tension of the printing sheet and prevents a decrease in tension during pull-back, thus improving printing quality. Furthermore, this method eliminates the need to stop and modify the intermittent offset printing press during operation, avoiding reduced equipment debugging efficiency.

[0041] This application does not limit the specific manner in which the "synchronous rotation of the first drive roller 101 and the second drive roller 102" is controlled in steps S201 and S202. In some optional embodiments, it may include controlling the first drive roller 101 and the second drive roller 102 to achieve synchronous rotation in a variable speed manner. In this way, the tension of the sheet to be printed 200 can be better maintained during its reciprocating motion along the first direction F1 and the second direction F2, thereby stabilizing the tension of the sheet to be printed 200.

[0042] Optionally, refer to Figure 3 The flowchart shown includes sub-steps S301, S302, and S303, which state that "controlling the first drive roller 101 and the second drive roller 102 to achieve synchronous rotation in a variable speed manner":

[0043] S301: Set the electronic cam virtual axis and the main virtual axis of the intermittent offset printing machine 100, and set the electronic cam virtual axis and the main virtual axis to maintain a cam synchronization relationship. The main virtual axis is used to control the linear speed when the first drive roller 101 and the second drive roller 102 drive the sheet to be printed to move along the first direction F1 or the second direction F2.

[0044] S302: The first drive roller 101 and the electronic cam virtual axis are kept in gear synchronization relationship with the first synchronization ratio, and the second drive roller 102 and the electronic cam virtual axis are kept in gear synchronization relationship with the second synchronization ratio.

[0045] S303: By controlling the variable speed rotation of the electronic cam virtual axis, the first drive roller 101 rotates synchronously with the electronic cam virtual axis based on the first synchronization ratio, and the second drive roller 102 rotates synchronously with the electronic cam virtual axis based on the second synchronization ratio, so that the first drive roller 101 and the second drive roller 102 achieve synchronous rotation in a variable speed manner.

[0046] In this application, by setting the electronic cam virtual axis to maintain a cam synchronization relationship with the main virtual axis, the first drive roller 101 is made to maintain a gear synchronization relationship with the electronic cam virtual axis at a first synchronization ratio, and the second drive roller 102 is made to maintain a gear synchronization relationship with the electronic cam virtual axis at a second synchronization ratio. Finally, by controlling the variable speed rotation of the electronic cam virtual axis, the first drive roller 101 is made to rotate synchronously with the electronic cam virtual axis based on the first synchronization ratio, and the second drive roller 102 is made to rotate synchronously with the electronic cam virtual axis based on the second synchronization ratio. Therefore, in this way, the gears of the first drive roller 101 and the second drive roller 102 are synchronized with the same electronic cam virtual axis, making the control of the synchronous rotation of the first drive roller 101 and the second drive roller 102 more reliable, thereby effectively ensuring the consistency of the operation of the first drive roller 101 and the second drive roller 102, ensuring the maintenance of the tension of the sheet to be printed 200 (e.g., printing paper) in the printing area between the first drive roller 101 and the second drive roller 102 of the intermittent offset printing machine 100 during the reciprocating motion along the first direction F1 and the second direction F2, so that the tension of the sheet to be printed 200 is stable.

[0047] It should be understood that setting the electronic cam virtual axis, main virtual axis, first synchronization ratio, second synchronization ratio, various synchronization relationships, and control of the electronic cam virtual axis in the electrical setup are existing technologies and will not be elaborated here. However, for ease of understanding, the first synchronization ratio and the second synchronization ratio will be briefly explained. For example, using the first synchronization ratio (for example, denoted as i1) to maintain a gear synchronization relationship between the first drive roller 101 and the electronic cam virtual axis, with such a gear synchronization relationship, at any moment when the electronic cam virtual axis rotates, the rotational speed R1 of the first drive roller 101 and the rotational speed R0 of the electronic cam virtual axis will strictly satisfy the following relationship: R1 / R0 = i1; using the second synchronization ratio (for example, denoted as i2) to maintain a gear synchronization relationship between the second drive roller 102 and the electronic cam virtual axis, with such a gear synchronization relationship, at any moment when the electronic cam virtual axis rotates, the rotational speed R2 of the second drive roller 102 and the rotational speed R0 of the electronic cam virtual axis will strictly satisfy the following relationship: R2 / R0 = i2. This ensures the synchronicity of the rotation of the first drive roller 101 and the consistency of the action of the second drive roller 102.

[0048] Optionally, in this embodiment of the application, when the second synchronization ratio is greater than the first synchronization ratio, the rotational speed of the second drive roller 102 is greater than the rotational speed of the first drive roller 101; and when the first synchronization ratio is greater than the second synchronization ratio, the rotational speed of the first drive roller 101 is greater than the rotational speed of the second drive roller 102.

[0049] Therefore, by finely adjusting the first synchronization ratio and the second synchronization ratio as needed, this application can make a slight constant speed difference between the first drive roller 101 and the second paper pulling roller 102, effectively ensuring the maintenance of the tension of the sheet to be printed 200 between the first drive roller 101 and the second drive roller 102, so that the tension of the sheet to be printed 200 is stable.

[0050] Correspondingly, in step S201, controlling the rotational speed of the second drive roller 102 to be greater than the rotational speed of the first drive roller 101 can be achieved under the condition that the second synchronization ratio is greater than the first synchronization ratio; while in step S202, controlling the rotational speed of the first drive roller 101 to be greater than the rotational speed of the second drive roller 102 can be achieved under the condition that the first synchronization ratio is greater than the second synchronization ratio.

[0051] It should be noted that this application does not limit the specific method of controlling the rotational speed of the second drive roller 102 to be greater than the rotational speed of the first drive roller 101 in step S201. In some optional embodiments, when the printing sheet 200 is driven to move along the first direction F1, the method of "controlling the rotational speed of the second drive roller 102 to be greater than the rotational speed of the first drive roller 101" in step S201 may include the following methods A1 or A2, wherein:

[0052] Method A1: The rotational speed of the first drive roller 101 is determined and controlled using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller 101, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1; and the rotational speed of the second drive roller 102 is determined and controlled using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller 102, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1 + a1, where a1 represents the first preset adjustment coefficient, 0 < a1 < 1. (Optionally, the specific value of the first preset adjustment coefficient a1 can be set as needed, and this application does not impose any restrictions here.)

[0053] Method A2: The rotational speed of the first drive roller 101 is determined and controlled using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller 101, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1 - a2, where a2 represents the second preset adjustment coefficient, 0 < a2 < 1; and the rotational speed of the second drive roller 102 is determined and controlled using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller 102, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1. (Optionally, the specific value of the second preset adjustment coefficient a2 can be set as needed, and this application does not impose any restrictions here.)

[0054] In this application, by means of method A1 or method A2, the rotational speed of the second drive roller 102 can be effectively and accurately controlled to be greater than the rotational speed of the first drive roller 101.

[0055] It should be noted that this application does not limit the specific method of controlling the rotational speed of the first drive roller 101 to be greater than the rotational speed of the second drive roller 102 in step S202. In some optional embodiments, when the printing sheet 200 is driven to move along the second direction F2, the method of "controlling the rotational speed of the first drive roller 101 to be greater than the rotational speed of the second drive roller 102" in step S202 may include the following methods B1 or B2, wherein:

[0056] Method B1: The rotational speed of the first drive roller 101 is determined and controlled using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller 101, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1; and the rotational speed of the second drive roller 102 is determined and controlled using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller 102, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1 - a3, where a3 represents the third preset adjustment coefficient, 0 < a3 < 1. (Optionally, the specific value of the third preset adjustment coefficient a3 can be set as needed, and this application does not impose any restrictions here.)

[0057] Method B2: The rotational speed of the first drive roller 101 is determined and controlled using the formula: R1 = i1 * R0, where R1 represents the rotational speed of the first drive roller 101, R0 represents the rotational speed of the electronic cam virtual axis, i1 represents the first synchronization ratio, and i1 = 1 + a4, where a4 represents the fourth preset adjustment coefficient, 0 < a4 < 1; and the rotational speed of the second drive roller 102 is determined and controlled using the formula: R2 = i2 * R0, where R2 represents the rotational speed of the second drive roller 102, R0 represents the rotational speed of the electronic cam virtual axis, i2 represents the second synchronization ratio, and i2 = 1. (Optionally, the specific value of the fourth preset adjustment coefficient a4 can be set as needed, and this application does not impose any restrictions here.)

[0058] In this application, by means of method B1 or method B2, the rotational speed of the first drive roller 101 can be effectively and accurately controlled to be greater than the rotational speed of the second drive roller 102.

[0059] Based on the above optional embodiments, steps 201 and S202 can each adopt four different combinations, namely: mode A1 + mode B1, mode A1 + mode B2, mode A2 + mode B1, mode A2 + mode B2. These can be selected as needed, and this application does not impose any restrictions on them.

[0060] This application employs any of the four preferred combinations described above. When printing on the sheet to be printed 200 (e.g., printing paper) using the intermittent offset printing press 100, it ensures that the first drive roller 101 and the second drive roller 102 operate synchronously while maintaining the tension of the sheet to be printed 200 during its reciprocating motion along the first direction F1 and the second direction F2. This stabilizes the tension of the sheet to be printed 200, preventing a decrease in tension during pull-back, thus improving print quality. Furthermore, during debugging, the intermittent offset printing press 100 does not need to be stopped for modification during operation, avoiding reduced equipment debugging efficiency. In addition, practical verification shows that using any of the four preferred combinations, the printing accuracy of the intermittent offset printing press 100 can be controlled within 0.05mm. Therefore, the control method of this application embodiment can effectively improve the print quality of the intermittent offset printing press 100.

[0061] Optionally, for the case of method A1 + method B1 above, the third preset adjustment coefficient a3 and the first preset adjustment coefficient a1 can be set to the following relationship: a3 = k1 * a1, where k1 is a preset constant and k1 > 0 (k1 can be called the first forward / backward speed difference ratio coefficient). This allows for simultaneous adjustment of the third preset adjustment coefficient a3 by fine-tuning the first preset adjustment coefficient a1, making parameter adjustment more convenient. For the case of method A2 + method B2 above, the fourth preset adjustment coefficient a4 and the second preset adjustment coefficient a2 can be set to the following relationship: a4 = k2 * a2, where k2 is a preset constant and k2 > 0 (k2 can be called the first forward / backward speed difference ratio coefficient). This allows for simultaneous adjustment of the fourth preset adjustment coefficient a4 by fine-tuning the second preset adjustment coefficient a2, making parameter adjustment more convenient. For example, during a fixed-length printing process on an intermittent offset printing machine 100, the same first forward / backward speed difference ratio coefficient k1 can be used at different speeds to adjust the third preset adjustment coefficient a3. For example, during a fixed-length printing process on an intermittent offset printing press 100, the same second forward and backward speed difference ratio coefficient k2 can be used at different speeds to adjust the second preset adjustment coefficient a2.

[0062] It is understood that the above content is only an exemplary explanation of the control method of the intermittent offset printing machine in the embodiments of this application, and is not intended to limit the embodiments of this application.

[0063] Based on the same inventive concept as the control method of the aforementioned intermittent offset printing machine, and referring to... Figure 4 As shown, another aspect of this application provides a control device 400 for an intermittent offset printing machine. The intermittent offset printing machine 100 includes a first drive roller 101 and a second drive roller 102 spaced apart along a first direction F1. The first drive roller 101 and the second drive roller 102 are used to drive the printable sheet 200 to move along the first direction F1 or drive the printable sheet 200 to move along a second direction F2 opposite to the first direction F1 when in contact with the printable sheet 200. The control device 400 for the intermittent offset printing machine includes:

[0064] The first control module 401 is configured to, when controlling the first drive roller 101 and the second drive roller 102 to rotate synchronously to drive the printable sheet 200 to move along the first direction F1, control the rotational speed of the second drive roller 102 to be greater than the rotational speed of the first drive roller 101; and,

[0065] The second control module 402 is used to control the rotational speed of the first drive roller 101 to be greater than the rotational speed of the second drive roller 102 when controlling the first drive roller 101 and the second drive roller 102 to rotate synchronously to drive the printable sheet 200 to move along the second direction F2.

[0066] The control device 400 for the intermittent offset printing machine in this embodiment corresponds to the control method for the intermittent offset printing machine in the foregoing embodiments. The relevant content of the control device 400 for the intermittent offset printing machine can be understood with reference to the control method for the intermittent offset printing machine described above, and will not be repeated here.

[0067] Figure 5 A schematic diagram of an optional electronic device according to an embodiment of this application is shown. This application does not limit the specific implementation of the electronic device 500; however, as an example, reference is made to... Figure 5 The electronic device 500 provided in this application embodiment includes: a processor 502, a communications interface 504, a memory 506, and a communication bus 508. Wherein:

[0068] The processor 502, communication interface 504, and memory 506 communicate with each other via communication bus 508.

[0069] Communication interface 504 is used to communicate with other electronic devices or servers.

[0070] The processor 502 is used to execute program 510, which can specifically execute the relevant steps in any of the aforementioned control method embodiments for intermittent offset printing machines.

[0071] Specifically, program 510 may include program code that includes computer operation instructions.

[0072] The processor 502 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. The smart device includes one or more processors, which may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0073] Memory 506 is used to store program 510. Memory 506 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0074] Specifically, program 510 can be used to cause processor 502 to execute the control method of intermittent offset printing machine in any of the foregoing embodiments.

[0075] The specific implementation of each step in program 510 can be found in the corresponding steps and units described in any of the aforementioned control method embodiments for intermittent offset printing machines, and will not be repeated here. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the equipment and modules described above can be referred to the corresponding process descriptions in the aforementioned method embodiments, and will not be repeated here.

[0076] According to a third aspect of the embodiments of this application, the embodiments of this application provide a computer storage medium storing instructions for causing a machine to perform a control method for an intermittent offset printing machine as described herein. Specifically, a system or apparatus equipped with a storage medium storing software program code that implements the functions of any of the embodiments described above, and enabling the computer (or CPU or MPU) of the system or apparatus to read and execute the program code stored in the storage medium.

[0077] In this case, the program code read from the storage medium can itself implement the function of any of the above embodiments, and therefore the program code and the storage medium storing the program code constitute part of this application.

[0078] Examples of storage media used to provide program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, program code can be downloaded from a server computer via a communication network.

[0079] Furthermore, it should be clear that not only can the program code read by the computer be executed, but also the operating system or other components operating on the computer can be instructed based on the program code to perform some or all of the actual operations, thereby realizing the function of any of the embodiments described above.

[0080] Furthermore, it is understood that the program code read from the storage medium is written to the memory set in the expansion board inserted into the computer or to the memory set in the expansion module connected to the computer. Then, based on the instructions of the program code, the CPU or other components installed on the expansion board or expansion module execute some and all of the actual operations, thereby realizing the function of any of the above embodiments.

[0081] According to the fourth aspect of the embodiments of this application, the embodiments of this application also provide a computer program product, which is tangibly stored on a computer-readable medium and includes computer-executable instructions, which, when executed, cause at least one processor to perform the control method for the intermittent offset printing machine provided in the above embodiments. It should be understood that the solutions in this embodiment have the corresponding technical effects in the above method embodiments, and will not be repeated here.

[0082] The embodiments of the apparatus / electronic device / computer storage medium / computer program product of this application are basically similar in content and beneficial effects to the embodiments of the control method for the intermittent offset printing machine provided in the first aspect above. Therefore, the description here is relatively brief and can be understood based on the embodiments of the control method for the intermittent offset printing machine above.

[0083] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0084] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative and not restrictive, and those skilled in the art should understand that unless explicitly indicated in the context, they should be understood as "one or more".

[0085] It should be understood that expressions such as "first" and "second" used in the embodiments of this application may modify various components regardless of their order and / or importance, but these expressions do not limit the corresponding components. The above expressions are configured only for the purpose of distinguishing components from other components.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A control method for an intermittent offset printing machine, wherein, The intermittent offset printing machine includes a first drive roller and a second drive roller spaced apart along a first direction. The first drive roller and the second drive roller are used to drive the sheet to be printed to move along the first direction or to drive the sheet to be printed to move along a second direction opposite to the first direction when in contact with the sheet to be printed. The method includes: When controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the first direction, the rotational speed of the second drive roller is controlled to be greater than the rotational speed of the first drive roller; and, When controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the second direction, the rotational speed of the first drive roller is controlled to be greater than the rotational speed of the second drive roller. Specifically, the first drive roller and the second drive roller are controlled to rotate synchronously in a variable speed manner; The method of controlling the first drive roller and the second drive roller to rotate synchronously in a variable speed manner further includes: The electronic cam virtual axis and the main virtual axis of the intermittent offset printing machine are set, and the electronic cam virtual axis and the main virtual axis are set to maintain a cam synchronization relationship. The main virtual axis is used to control the linear speed of the first drive roller and the second drive roller when driving the printable sheet to move along the first direction or the second direction. The first drive roller and the electronic cam virtual axis are kept in gear synchronization relationship with a first synchronization ratio, and the second drive roller and the electronic cam virtual axis are kept in gear synchronization relationship with a second synchronization ratio; By controlling the variable speed rotation of the electronic cam virtual axis, the first drive roller rotates synchronously with the electronic cam virtual axis based on the first synchronization ratio, and the second drive roller rotates synchronously with the electronic cam virtual axis based on the second synchronization ratio, so that the first drive roller and the second drive roller can achieve synchronous rotation in a variable speed manner; Furthermore, when the second synchronization ratio is greater than the first synchronization ratio, the rotational speed of the second drive roller is greater than the rotational speed of the first drive roller; when the first synchronization ratio is greater than the second synchronization ratio, the rotational speed of the first drive roller is greater than the rotational speed of the second drive roller. When the printable sheet is driven to move along the first direction, controlling the rotational speed of the second drive roller to be greater than the rotational speed of the first drive roller includes: In the formula: Determine and control the rotational speed of the first drive roller, wherein, Used to characterize the rotational speed of the first drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the first synchronization ratio, and Furthermore, using the formula: Determine and control the rotational speed of the second drive roller, wherein, Used to characterize the rotational speed of the second drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the second synchronization ratio, and ,in, Used to characterize the first preset adjustment coefficient ; or, When the printable sheet is driven to move along the first direction, controlling the rotational speed of the second drive roller to be greater than the rotational speed of the first drive roller includes: In the formula: Determine and control the rotational speed of the first drive roller, wherein, Used to characterize the rotational speed of the first drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the first synchronization ratio, and ,in, Used to characterize the second preset adjustment coefficient Furthermore, using the formula: Determine and control the rotational speed of the second drive roller, wherein, Used to characterize the rotational speed of the second drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the second synchronization ratio, and .

2. The method according to claim 1, characterized in that, When the printable sheet is driven to move along the second direction, controlling the rotational speed of the first drive roller to be greater than the rotational speed of the second drive roller includes: In the formula: Determine and control the rotational speed of the first drive roller, wherein, Used to characterize the rotational speed of the first drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the first synchronization ratio, and Furthermore, using the formula: Determine and control the rotational speed of the second drive roller, wherein, Used to characterize the rotational speed of the second drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the second synchronization ratio, and ,in, Used to characterize the third preset adjustment coefficient ; or, When the printable sheet is driven to move along the second direction, controlling the rotational speed of the first drive roller to be greater than the rotational speed of the second drive roller includes: In the formula: Determine and control the rotational speed of the first drive roller, wherein, Used to characterize the rotational speed of the first drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the first synchronization ratio, and ,in, Used to characterize the fourth preset adjustment coefficient Furthermore, using the formula: Determine and control the rotational speed of the second drive roller, wherein, Used to characterize the rotational speed of the second drive roller, Characterizing the rotational speed of the virtual axis of the electronic cam, Used to characterize the second synchronization ratio, and .

3. A control device for an intermittent offset printing machine, wherein, The intermittent offset printing machine includes a first drive roller and a second drive roller spaced apart along a first direction. The first drive roller and the second drive roller are used to drive the sheet to be printed to move along the first direction or to drive the sheet to be printed to move along a second direction opposite to the first direction when in contact with the sheet to be printed. The device is characterized by comprising: A first control module is configured to, when controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the first direction, control the rotational speed of the second drive roller to be greater than the rotational speed of the first drive roller; and, The second control module is used to control the rotational speed of the first drive roller to be greater than the rotational speed of the second drive roller when controlling the first drive roller and the second drive roller to rotate synchronously to drive the printable sheet to move along the second direction. The first drive roller and the second drive roller rotate synchronously by means of speed change; The method of controlling the first drive roller and the second drive roller to rotate synchronously in a variable speed manner further includes: The electronic cam virtual axis and the main virtual axis of the intermittent offset printing machine are set, and the electronic cam virtual axis and the main virtual axis are set to maintain a cam synchronization relationship. The main virtual axis is used to control the linear speed of the first drive roller and the second drive roller when driving the printable sheet to move along the first direction or the second direction. The first drive roller and the electronic cam virtual axis are kept in gear synchronization relationship with a first synchronization ratio, and the second drive roller and the electronic cam virtual axis are kept in gear synchronization relationship with a second synchronization ratio; By controlling the variable speed rotation of the electronic cam virtual axis, the first drive roller rotates synchronously with the electronic cam virtual axis based on the first synchronization ratio, and the second drive roller rotates synchronously with the electronic cam virtual axis based on the second synchronization ratio, so that the first drive roller and the second drive roller achieve synchronous rotation in a variable speed manner.

4. An electronic device, comprising: The processor, the communication interface, the memory, and the communication bus are provided, and the processor, the communication interface, and the memory communicate with each other through the communication bus. The memory is used to store at least one executable instruction that causes the processor to perform the operation corresponding to the method as described in any one of claims 1-2.

5. A computer-readable storage medium storing computer instructions that, when executed by a processor, cause the processor to perform the method of any one of claims 1-2.

6. A computer program product tangibly stored on a computer-readable medium and comprising computer-executable instructions that, when executed, cause at least one processor to perform the method according to any one of claims 1-2.

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