Control device and method for positioning start and stop dialing of number set

Abstract

The present invention relates to a control device and method for positioning start and stop dialing of a numbering machine group, comprising a numbering machine group installation system, a dialing control system, and an electrical control system. The device is characterized in that the numbering machine group installation system includes a numbering machine group consisting of multiple numbering machines, the dialing control system includes a dialing finger with adjustable direction, and utilizes a cylinder to drive a dial shaft up and down to achieve dialing and stop dialing. The electrical control system controls the cylinder movement via a start-stop switch, an electromagnetic sensor, a controller, and an electromagnetic reversing valve. After a signal to start or stop dialing is given, dialing is started or stopped only from the first numbering machine, thereby maintaining numerical continuity of the numbering machines in the numbering machine group. The control device utilizes an online image detection system, and dialing is started only when the printed image is detected to be qualified. This technical solution solves the technical problem of positioning start and stop dialing control for multiple numbering machines in the numbering machine group.

Description

Technical Field

[0001] The present invention relates to a printing device and a printing method, in particular to a control device and method for positioning start and stop dialing of a numbering machine group. Background Art

[0002] When printing variable number products online with a roll-fed offset printing machine, matching graphic printing with variable number printing has always been a difficulty. At the same time, variable number printing uses number machine dialing to achieve continuous variable numbers. Due to the inevitable problems of machine adjustments, mid-process shutdowns, and malfunctions during printing production, which cause defects in graphic printing, the printed numbers are also scrapped and need to be readjusted. Especially when multiple numbering machines are printing simultaneously, the value of each number in the numbering machine group should be continuous, and the skip number value is the number of numbering machines in the group. For example, if a group of six numbering machines is used, the value of each numbering machine dialing a number is the previous value + 6, that is, the initial value of the first numbering machine is 1, which becomes 7 after dialing a number once, the initial value of the second numbering machine is 2, which becomes 8 after dialing a number once, ..., the initial value of the sixth numbering machine is 6, which becomes 12 after dialing a number once; after the second dialing, the value of the first numbering machine becomes 13, the value of the second numbering machine becomes 14, and so on... If the printing of the graphic stops in the middle, the dialing must be stopped. Since it is impossible to determine which numbering machine the dialing stop point is, it is also impossible to determine which numbering machine to start at when restarting. This will cause number confusion or missing numbers, and it is very easy to miss numbers. It is time-consuming and labor-intensive to fill in the numbers afterwards, which is difficult to operate and has low production efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a control device and method for positioning start and stop dialing of a number machine group, so as to solve the technical problem of positioning start and positioning stop dialing control of a combined multi-number machine.

[0004] To achieve the above objectives, the present invention employs the following technical solution: a control device for positioning, starting, and stopping dialing of a numbering machine assembly, comprising a numbering machine assembly mounting system, a dialing control system, and an electrical control system. The numbering machine assembly mounting system includes a numbering machine assembly consisting of multiple numbering machines, each of which is fixedly mounted on a numbering plate, which is fixedly mounted on a numbering shaft. The numbering shaft can be mounted with multiple numbering plates, i.e., multiple numbering machine assemblies. The numbering machine dials a number once by rotating a dial crank 90 degrees, and after dialing, the dial crank automatically resets using spring force. The dialing control system includes a dialing finger mounted on a mounting block, connected to the mounting block via a pin and capable of rotation and locking. The mounting block is fixed to a dialing shaft, each end of which is supported by the piston rod of a cylinder. The number of dialing fingers is the same as the numbering machine assemblies. The electrical control system includes an electromagnetic sensor and a magnet fixed on the marking shaft; the electromagnetic sensor is electrically connected to a controller, the controller is also electrically connected to an electromagnetic reversing valve, the electromagnetic reversing valve is pneumatically connected to two cylinders, and the cylinders are installed on the main equipment; the electrical control system also includes a start-stop switch, which is electrically connected to the controller.

[0005] According to a further technical solution, the dial finger is a hyperbolic structure, including a dialing curved surface and a reset curved surface, and the dialing curved surface and the reset curved surface are connected and transitioned by an arc.

[0006] A further technical solution is that the control device for positioning, starting and stopping dialing of the numbering unit also includes an online image detection system installed in front of the numbering unit installation system. The online image detection system includes an image acquisition head and a control computer. The image acquisition head is electrically connected to the control computer, and the control computer is electrically connected to the controller of the electrical control system.

[0007] The dialing control method of the control device for starting and stopping dialing using the positioning of the above-mentioned number set is implemented by the following steps:

[0008] Adjustment of the initial position of the numbering machine group: Install a group of multiple numbering machines evenly on the numbering plate, adjust the values ​​of each numbering machine to the initial value, point the first numbering machine installation position toward the magnet, and adjust the dialing direction until the first numbering machine can dial after being pressed.

[0009] Start dialing: Manually press the start-stop switch to give a signal to start dialing. When the magnet rotates with the numbering shaft to a position facing the electromagnetic sensor, the controller receives a signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move downward to press the dial finger. The first numbering machine rotates to the dial finger position, and the dial crank on the numbering machine rotates 90 degrees along the dial finger curved surface, causing the numbering machine to dial once. After dialing, the dial crank is automatically reset by the spring force; similarly, each numbering machine rotates to the dial finger position to dial once.

[0010] Number printing: Each numbering machine dials a number once for each rotation of the numbering shaft. The digit increment of each numbering machine is the number value of the numbering machine each time it is dialed. The numbering machine group prints out continuous numbers in a cycle.

[0011] Stop dialing: Press the start-stop switch again to give a signal to stop dialing. When the magnet rotates with the numbering shaft to the position facing the electromagnetic sensor, the controller receives the signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move upward to lift the dial finger. The first numbering machine will first disengage the dial crank and stop dialing. As the numbering shaft rotates, the other numbering machines will stop dialing accordingly.

[0012] Compared to existing technologies, the present invention offers the following advantages: Based on the aforementioned control device and method for positioning and starting and stopping dialing for a numbering machine, the dialing finger of the dialing control system is rotatably and lockably connected to a mounting block via a shaft, allowing for easy adjustment of the dialing finger's direction and achieving accurate dialing. The dialing finger, through the mounting block, the dialing shaft, and the cylinders at both ends, enables both dialing and stopping. Multiple dialing fingers and numbering machines can be installed based on product requirements, enabling multi-row, variable number printing. The electrical control system generates start and stop dialing signals via a start / stop switch. The controller controls the operation of the electromagnetic reversing valve through an electromagnetic sensor and a magnet mounted on the numbering shaft, controlling the up and down movement of the cylinder piston rod, thereby causing the dial finger to dial or stop dialing. Because the first numbering machine's mounting position can be adjusted to point toward the magnet, when the dial finger is pressed, the multiple numbering machines in the numbering machine group can only start dialing from the first numbering machine. When the dial finger is lifted, the first numbering machine disengages the dial crank first and stops dialing. This start / stop dialing action, even if manually initiated, does not immediately trigger the dialing control system. It only starts or stops dialing after the first numbering machine in the numbering machine group arrives. This prevents disruption of the numerical sequence of the various numbering machines in the numbering machine group, maintaining a continuous number sequence. This device and method for controlling positional start and stop dialing in a numbering machine group solves the technical problem of positional start and stop dialing control for multiple numbering machines in a numbering machine group. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is the dialing control device and system principle diagram of the present invention.

[0014] Attachment Figure 2 It is a schematic elevation view of the device structure of the present invention.

[0015] Attachment Figure 3 It is a structural diagram of the dial finger of the present invention.

[0016] Attachment Figure 4The present invention is a dial control device including an online image detection system and a system principle diagram.

[0017] Explanation of the symbols in the accompanying drawings: 1—number unit installation system; 2—dialing control system; 3—electrical control system, 4—online image detection system. DETAILED DESCRIPTION

[0018] In order to make the implementation objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings by way of embodiments.

[0019] The control device for positioning, starting, and stopping dialing of a numbering machine set, as shown in the embodiments of Figures 1 and 2, includes a numbering machine set installation system 1, a dialing control system 2, and an electrical control system 3. The numbering machine set installation system 1 includes a plurality of numbering machines 11, each of which is fixedly mounted on a numbering plate 12, which is fixedly mounted on a numbering shaft 13. The numbering shaft 13 can be mounted with multiple numbering plates 12 according to product requirements, thereby mounting multiple sets of numbering machines 11, thereby achieving multi-row variable number printing. The numbering shaft 13 is mounted on the main equipment via rolling bearings and is connected to the transmission system to obtain rotational power. The aforementioned plurality of numbering machines 11 is generally 2 to 10, and commonly used are 2, 3, 4, or 6 numbering machines to form a numbering machine set. This embodiment is shown in Figure 1. Figure 2 Two numbering plates 12 are mounted on the numbering shaft 13, i.e., two sets of numbering machines 11 are mounted. Each set of numbering machines 11 includes six numbering machines 11. The numbering machines 11 are six-step numbering machines (i.e., each dialed number is +6), and are evenly distributed on the numbering plates 12 according to product order requirements. This numbering machine 11 dials a number once by rotating the dial crank 14 90 degrees. After dialing, the dial crank 14 automatically resets due to spring force.

[0020] The dial control system 2 in this embodiment includes a dial finger 21, which is mounted on a mounting block 22. The dial finger 21 and the mounting block 22 are connected by a pin and can be rotated and locked, so that the direction of the dial finger 21 can be easily adjusted. The mounting block 22 is fixed to a dial shaft 23. The ends of the dial shaft 23 are supported on the piston rod of a cylinder 24. The cylinder 24 can move the dial finger 21 up and down to dial (dial position B, as shown in the attached figure). Figure 2 as shown) and stop dialing (stop bit A, as shown Figure 2 As shown in FIG. 1 , the cylinder 24 is mounted on the main device. The number of dial fingers 21 corresponds to the number machine group. In this embodiment, there are two dial fingers 21, that is, each dial finger 21 controls a group of number machines 11 to dial.

[0021] The dial finger 21 in this embodiment is a hyperbolic structure, as shown in the attached figure. Figure 3As shown, the dial finger 21 includes a dialing curved surface 211 and a reset curved surface 212, and the dialing curved surface 211 and the reset curved surface 212 are connected and transitioned by an arc. When the number machine 11 reaches the dialing position, the dial crank 14 first contacts the entrance of the dialing curved surface 211 (see FIG. Figure 3 The dial crank 14 is contacted with the dial finger 21 (shown below), gradually tightening and compressing the dial crank 14 relative to the numbering machine 11. When the curved surface 211 reaches its apex, the dial crank 14 rotates exactly 90 degrees, driving the numbering machine 11 to dial once. After passing the apex, the dial crank 14 enters the return curved surface 212. The pressure on the return curved surface 212 gradually relaxes, and the dial crank 14 automatically returns to its original position under the action of the spring force on the numbering machine 11. The dial finger 21 also has a mounting hole 213 for secure installation and adjustment. This hyperboloidal structure of the dial finger 21 ensures that dialing and resetting of the numbering machine 11 are always within the constraints of the curved surface, ensuring reliable dialing and stable resetting. It also protects the numbering machine 11 from impact during operation, extending its service life.

[0022] Compared with the traditional dial ring dialing solution, the dialing solution using the dial finger 21 has a simple structure, is easy to install and adjust, is easy to achieve effective control of starting and stopping dialing, and has low processing and use costs.

[0023] The electrical control system 3 in this embodiment includes an electromagnetic sensor 31 and a magnet 32 ​​fixedly mounted on the numbering shaft 13. The electromagnetic sensor 31 senses and sends a signal every time the numbering shaft 13 rotates one circle. The electromagnetic sensor 31 is electrically connected to a controller 33, which is electrically connected to an electromagnetic reversing valve 34. The electromagnetic reversing valve 34 is pneumatically connected to the two cylinders 24 to control the up and down movement of the piston rods of the cylinders 24, thereby realizing the dialing of the dial finger 21 (dial position B, as shown in the attached figure). Figure 2 as shown) and stop dialing (stop bit A, as shown Figure 2 As shown in FIG. 1 ); the initial state of the solenoid reversing valve 34 is the stop position (stop position A). The electrical control system 3 also includes a start / stop switch 35 , which is electrically connected to the controller 33 . The start / stop switch 35 also controls the operation of the solenoid reversing valve 34 through the controller 33 , providing signals for starting and stopping dialing.

[0024] The method of using the control device for positioning start and stop dialing of the number machine group of the above embodiment is as follows:

[0025] Adjust the initial position of the numbering machine group: Install all the numbering machines 11 in the numbering machine group evenly on the numbering plate 12, and adjust the values ​​of each numbering machine 11 to the initial value. The first numbering machine 11 is installed in the direction of the magnet 32, and the direction of the dial finger 21 is adjusted so that the first numbering machine 11 can dial a number when pressed.

[0026] Starting dialing: When the printing equipment is operating normally and printing is normal, the start / stop switch 35 is manually pressed to signal the start of dialing. When the magnet 32 ​​rotates with the numbering shaft 13 to a position directly opposite the electromagnetic sensor 31, the controller 33 receives the signal from the electromagnetic sensor 31, instructing the electromagnetic reversing valve 34 to operate. This controls the piston rod of the air cylinder 24 to move downward, depressing the dial finger 21. The first numbering machine 11 rotates to the position of the dial finger 21. The dial crank 14 on the numbering machine 11 rotates 90 degrees along the curved surface of the dial finger 21, causing the numbering machine 11 to dial once (for example, if the initial number is 1, the number 7 is dialed. Note that before dialing, the numbering machine 11 is constantly printing the initial number. After dialing begins, the dial crank 14 rotates along the curved surface of the dial finger 21 once with each rotation of the numbering shaft 13, resulting in one dialing operation). After dialing, the spring force automatically resets the dial crank 14, allowing the next number to be dialed. Similarly, each numbering machine 11 rotates to the position of the dial finger 21 to dial once. In this method of starting dialing, since the first numbering machine 11 is mounted toward the magnet 32, when the dial finger 21 is depressed, the six numbering machines 11 in the numbering machine group can only dial starting from the first numbering machine 11. This prevents the numerical sequence of the numbering machines 11 in the numbering machine group from being disrupted, and maintains a continuous number sequence.

[0027] Number printing: Each numbering machine 11 dials a number once for each rotation of the numbering shaft 13. Each time the number is dialed, the number of each numbering machine 11 is +6. The six numbering machines 11 print out continuous numbers in a cycle.

[0028] Stop dialing: When it is necessary to stop number printing (regardless of whether printing is stopped or due to a printing malfunction), the start / stop switch 35 is pressed again to signal the stop dialing. When the magnet 32 ​​rotates with the numbering shaft 13 to a position directly opposite the electromagnetic sensor 31, the controller 33 receives the signal from the electromagnetic sensor 31 and instructs the electromagnetic reversing valve 34 to operate, controlling the piston rod of the air cylinder 24 to move upward, raising the dial finger 21. Since the first numbering machine 11 is installed in a position pointing toward the magnet 32, after the dial finger 21 is raised, it disengages the dial crank 14 and stops dialing. As the numbering shaft 13 rotates, the other numbering machines 11 (second through sixth) stop dialing accordingly. In this stop dialing operation, even if a stop dialing signal is manually given, the dialing control system 2 does not stop immediately. Instead, it waits until all six numbering machines 11 in the numbering machine group have completed dialing within one cycle, and then stops starting from the first numbering machine 11. This prevents disruption of the numerical sequence of the numbering machines 11 in the numbering machine group, and ensures that the numbers are always continuous. This ensures that when dialing is restarted, the number can be dialed sequentially starting from the first numbering machine 11, and the number value before the stop can be continued.

[0029] In another embodiment, as shown in the attached Figure 4The control device for positioning, starting, and stopping dialing for the numbering machine shown in the figure also includes an online image detection system 4 installed in front of the numbering machine installation system 1. The online image detection system 4 includes an image acquisition head 41 and a control computer 42. The image acquisition head 41 is electrically connected to the control computer 42, which is in turn electrically connected to the controller 33 of the electrical control system 3. This online image detection system 4 is installed after the printing of the image. The image captured by the image acquisition head 41 through high-frequency photography is transmitted to the control computer 42, where it is compared with a standard product image, and the printed product is judged to be qualified and a signal is generated.

[0030] This control device for positioning, starting, and stopping dialing for a numbering unit, including an online image inspection system 4, incorporates an automatic control mechanism into its dialing control method. Taking six numbering machines 11 per numbering unit as an example, during the dialing start step, after manually pressing the start / stop switch 35, if the online image inspection system 4 determines that the printed image is qualified, a signal to start dialing is sent to the controller 33. After the number is printed, an abnormality-induced automatic dialing stop step occurs. If the online image inspection system 4 detects that the printed image is unqualified, a signal to stop dialing is automatically sent to the controller 33. The complete control method steps are as follows:

[0031] Adjust the initial position of the numbering machine group: Install the six numbering machines 11 in the numbering machine group evenly on the numbering plate 12. Adjust the values ​​of each numbering machine 11 to the initial value. The first numbering machine 11 is installed in the direction of the magnet 32. Adjust the direction of the dial finger 21 so that the first numbering machine 11 can dial a number when pressed.

[0032] To start dialing: The start / stop switch 35 is manually pressed. When the online image inspection system 4 detects and determines that the printed image is qualified, it sends a signal to the controller 33 to start dialing. When the magnet 32 ​​rotates with the numbering shaft 13 to a position directly opposite the electromagnetic sensor 31, the controller 33 receives a signal from the electromagnetic sensor 31, instructing the electromagnetic reversing valve 34 to operate. This controls the piston rod of the air cylinder 24 to move downward, depressing the dial finger 21. The first numbering machine 11 rotates to the position of the dial finger 21. The dial crank 14 on the numbering machine 11 rotates 90 degrees along the curved surface of the dial finger 21, completing the dialing of the numbering machine 11. After the number is dialed, the dial crank 14 automatically returns to its original position due to the spring force, ready for the next dialing. Similarly, each numbering machine 11 rotates to the position of the dial finger 21 to complete the dialing.

[0033] Number printing: Each numbering machine 11 dials a number once for each rotation of the numbering shaft 13. Each time the number is dialed, the number of each numbering machine 11 is +6. The six numbering machines 11 print out continuous numbers in a cycle.

[0034] Automatic dialing stop in case of abnormality: When the online image detection system 4 detects that the printed product image or text is unqualified, it automatically sends a signal to the controller 33 to stop dialing. When the magnet 32 ​​rotates with the numbering shaft 13 to a position facing the electromagnetic sensor 31, the controller 33 receives a signal from the electromagnetic sensor 31, instructing the electromagnetic reversing valve 34 to operate, controlling the piston rod of the cylinder 24 to move upward to lift the dial finger 21. Since the installation position of the first numbering machine 11 points to the magnet 32, after the dial finger 21 is lifted, this first numbering machine 11 is first disengaged from the dial crank 14 and stops dialing. As the numbering shaft 13 rotates, the other numbering machines 11 (second to sixth) stop dialing accordingly.

[0035] Restart dialing: Follow the steps in "Start dialing" to restart dialing.

[0036] Stop dialing: When it is necessary to stop number printing, that is, to stop dialing, the start-stop switch 35 is manually pressed again to give a stop dialing signal. When the magnet 32 ​​rotates with the numbering shaft 13 to a position facing the electromagnetic sensor 31, the controller 33 receives the signal from the electromagnetic sensor 31, instructing the electromagnetic reversing valve 34 to operate, controlling the piston rod of the cylinder 24 to move upward to lift the dial finger 21. The first numbering machine 11 is first disengaged from the dial crank 14 and stops dialing. As the numbering shaft 13 rotates, the other numbering machines 11 (second to sixth) stop dialing accordingly.

[0037] The method of the control device for positioning the start and stop dialing of the numbering unit of the online image detection system 4 of this embodiment can continuously detect the quality of graphic printing through the online image detection system 4 during normal printing, ensuring that only qualified graphic printing products are printed with numbers, and unqualified products are not printed with numbers, thereby maintaining the continuity of numbers and the qualified rate of products, and greatly improving the degree of automation of printing production.

[0038] The technical solution of the present invention uses common materials, is suitable for industrial production, and is feasible and practical.

Claims

1. A control device for positioning, starting, and stopping dialing of a numbering machine unit, comprising a numbering machine unit installation system, a dialing control system, and an electrical control system, characterized in that: The numbering machine assembly system includes a numbering machine assembly consisting of a plurality of numbering machines, wherein the numbering machine is fixedly mounted on a numbering plate, which is fixedly mounted on a numbering shaft; the numbering machine dials a number once by rotating a dial crank 90 degrees, and after dialing, the dial crank automatically resets by a spring force; The dial control system includes a dial finger mounted on a mounting block, the dial finger and the mounting block being connected by a pin and rotatable and lockable; the mounting block being fixed to a dial shaft, the ends of which are supported on the piston rod of a cylinder, which is mounted on the main device; the number of dial fingers is the same as the number of number sets; The dial finger is a hyperbolic structure, including a dialing curved surface and a reset curved surface, the dialing curved surface and the reset curved surface are connected and transitioned by an arc, and a mounting hole is opened on the dial finger; The electrical control system includes an electromagnetic sensor and a magnet fixed on the numbering shaft; the electromagnetic sensor is electrically connected to a controller, the controller is also electrically connected to an electromagnetic reversing valve, and the electromagnetic reversing valve is pneumatically connected to the cylinder; the electrical control system also includes a start-stop switch, which is electrically connected to the controller; the method for stopping dialing is: pressing the start-stop switch to give a stop dialing signal, when the magnet rotates with the numbering shaft to a position facing the electromagnetic sensor, the controller receives the signal from the electromagnetic sensor, instructs the electromagnetic reversing valve to operate, controls the cylinder piston rod to move upward to lift the dialing finger, and the first numbering machine first disengages the dial crank and stops dialing. As the numbering shaft rotates, the other numbering machines stop dialing accordingly.

2. The control device for positioning start and stop dialing of a number machine group according to claim 1, further characterized by: It also includes an online image detection system installed in front of the number unit installation system. The online image detection system includes an image acquisition head and a control computer. The image acquisition head is electrically connected to the control computer, and the control computer is electrically connected to the controller of the electrical control system.

3. A method for controlling the positioning start and stop dialing of a numbering machine group, using the control device for the positioning start and stop dialing of a numbering machine group according to claim 1, characterized in that This dialing control method is implemented using the following steps: Adjust the initial position of the numbering machine group: Install all the numbering machines in the numbering machine group evenly on the numbering plate, and adjust the values ​​of each numbering machine to the initial value. The first numbering machine is installed in the direction of the magnet, and the dial finger direction is adjusted so that the first numbering machine can dial after being pressed down; Start dialing: Manually press the start / stop switch to signal the start of dialing. When the magnet rotates with the numbering shaft to a position facing the electromagnetic sensor, the controller receives a signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move downward to press the dial finger. The first numbering machine rotates to the dial finger position, and the dial crank on the numbering machine rotates 90 degrees along the dial finger surface, causing the numbering machine to dial once. After dialing, the dial crank automatically resets due to spring force. Similarly, each numbering machine rotates to the dial finger position to dial once. Number printing: Each numbering machine dials a number once per rotation of the numbering shaft. The digit increment of each numbering machine is the number value of the numbering machine. The numbering machine group prints out continuous numbers in a cycle. Stop dialing: Press the start-stop switch again to give a signal to stop dialing. When the magnet rotates with the numbering shaft to the position facing the electromagnetic sensor, the controller receives the signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move upward to lift the dial finger. The first numbering machine will first disengage the dial crank and stop dialing. As the numbering shaft rotates, the other numbering machines will stop dialing accordingly.

4. A method for controlling the positioning start and stop dialing of a numbering machine group, using the control device for the positioning start and stop dialing of a numbering machine group according to claim 2, characterized in that This dialing control method is implemented using the following steps: Adjust the initial position of the numbering machine group: Install all the numbering machines in the numbering machine group evenly on the numbering plate, and adjust the values ​​of each numbering machine to the initial value. The first numbering machine is installed in the direction of the magnet, and the dial finger direction is adjusted so that the first numbering machine can dial after being pressed down; Start dialing: Manually press the start / stop switch. When the online image detection system detects and determines that the printed image is qualified, it sends a signal to the controller to start dialing. When the magnet rotates with the numbering shaft to a position facing the electromagnetic sensor, the controller receives a signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move downward, pressing the dial finger. The first numbering machine rotates to the dial finger position, and the dial crank on the numbering machine rotates 90 degrees along the dial finger surface, causing the numbering machine to dial once. After dialing, the dial crank is automatically reset by the spring force. Similarly, each numbering machine rotates to the dial finger position to dial once. Number printing: Each numbering machine dials a number once per rotation of the numbering shaft. The digit increment of each numbering machine is the number value of the numbering machine. The numbering machine group prints out continuous numbers in a cycle. Automatic dialing stop in case of abnormality: When the online image inspection system detects that the printed product image or text is unqualified, it automatically sends a signal to the controller to stop dialing. When the magnet rotates with the numbering shaft to a position facing the electromagnetic sensor, the controller receives the signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move upward to lift the dial finger. The first numbering machine will first disengage the dial crank and stop dialing. As the numbering shaft rotates, the other numbering machines will stop dialing accordingly. Restart dialing: Follow the steps in "Start dialing" to restart dialing; Stop dialing: Press the start-stop switch again to give a signal to stop dialing. When the magnet rotates with the numbering shaft to the position facing the electromagnetic sensor, the controller receives the signal from the electromagnetic sensor, instructing the electromagnetic reversing valve to operate, controlling the cylinder piston rod to move upward to lift the dial finger. The first numbering machine will first disengage the dial crank and stop dialing. As the numbering shaft rotates, the other numbering machines will stop dialing accordingly.

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