Coil material taking-up and unwinding device and control method thereof

Abstract

The present invention relates to a coiled material unwinding and winding device and a control method thereof. The device comprises a frame, a discharge roller, a discharge tensioning roller, a printing table, a take-up tensioning roller, a take-up roller, and a controller for controlling the discharge motor and the take-up motor. The device is characterized in that a first distance sensor for detecting the position of the discharge tensioning roller is provided along the movement path of the discharge tensioning roller, and a second distance sensor for detecting the position of the take-up tensioning roller is provided along the movement path of the take-up tensioning roller. The device also includes a camera module, an illumination lamp, a temperature and humidity sensor, and a photoelectric sensor. The device eliminates the need for an operator to manually input the coiled material roll model and initial roll diameter before starting the unwinding and winding device. The device can automatically identify the coiled material roll model and obtain the initial roll diameter, thereby reducing the operator's workload and improving the operator's efficiency in operating and managing multiple unwinding and winding devices simultaneously.

Description

Technical Field

[0001] The present invention relates to the technical field of material rewinding and unwinding control of an inkjet printer, and in particular to a coil material rewinding and unwinding device and a control method thereof. Background Art

[0002] Inkjet printers print images or text by spraying ink droplets onto print media through a nozzle. Print quality depends in part on the precision of the print carriage nozzles, but also on the ink drying speed and the material collection method. While carriage printing accuracy can be achieved through the use of high-precision nozzles, the quality of the ink drying or drying directly impacts the quality of the final product.

[0003] Existing inkjet printers all adopt the rear-loading and front-loading method, that is, the printing roll is automatically unloaded by driving the unloading roller and the printing roll is automatically retracted by driving the rewinding roller, and inkjet printing is performed on the roll during the automatic unloading and rewinding process.

[0004] In this method of rewinding and unwinding, to ensure that the coil rewinding and unwinding speed is consistent with the printing speed, the operator is required to manually input the initial coil diameter before starting the device. The controller calculates the unwinding angular velocity and the rewinding angular velocity based on the input parameters.

[0005] In actual production, operators may need to control multiple printing devices at the same time. Before starting each printing device, they need to enter the initial roll diameter, which results in a large amount of operation and is not conducive to the operator's simultaneous control of multiple sets of winding and unwinding devices. This needs to be improved. Summary of the Invention

[0006] Based on the above description, the present invention provides a coil material taking-up and unwinding device and a control method thereof, which does not require the operator to manually input the initial coil diameter, and is simpler to operate.

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] A coil material unwinding and winding device comprises a frame, a unwinding roller, a movable unwinding tensioning roller, a printing table, a movable rewinding tensioning roller, a rewinding roller, and a controller for controlling the unwinding motor and the rewinding motor, the unwinding roller and the rewinding roller are driven by the unwinding motor and the rewinding motor respectively, a first distance sensor for detecting the position of the unwinding tensioning roller is provided on the moving path of the rewinding tensioning roller, and a second distance sensor for detecting the position of the rewinding tensioning roller is provided on the moving path of the rewinding tensioning roller, the coil material unwinding and winding device further comprises a camera module, an irradiation lamp, a temperature and humidity sensor and a photoelectric sensor, the camera module and the irradiation lamp are arranged relative to each other, the coil material passes between the camera module and the irradiation lamp, and the irradiation lamp is used to illuminate The web is irradiated with light, and the camera module is used to capture a light-transmitting image of the web under the light. The first distance sensor, the second distance sensor, and the photoelectric sensor are connected to the signal input end of the controller, and the irradiation lamp and the camera module are connected to the controller. Before the device is operated, the controller controls the irradiation lamp to light up to irradiate the web and controls the camera module to capture a light-transmitting image of the web. The controller detects the material and thickness of the web through image processing and recognition, determines the model of the web drum according to the material and thickness of the web, and then obtains the initial roll diameter of the web drum, determines the initial roll diameter of the unwinding according to the initial roll diameter of the web drum, and determines the initial roll diameter of the receiving drum according to the diameter of the receiving drum, and then calculates the initial unwinding angular velocity and the initial receiving angular velocity in combination with the default printing speed.

[0009] As a preferred solution: during the process of coiled material unwinding and unwinding, the controller gradually increases the unwinding angular velocity according to the position change of the unwinding tensioning roller, and gradually decreases the unwinding angular velocity according to the position change of the winding tensioning roller, ensuring that the unwinding tensioning roller and the winding tensioning roller are always within their respective preset position ranges.

[0010] As a preferred solution: the device also includes a temperature and humidity sensor, which is connected to the controller. The temperature and humidity sensor is used to detect the temperature and humidity values of the environment and feed the temperature and humidity data back to the controller. The controller obtains the thickness deviation rate of the current model of coil under the ambient temperature and humidity. During the process of coil unwinding and winding, the real-time number of coil turns on the unwinding roller and the real-time number of coil turns on the winding roller are obtained. The corrected real-time unwinding diameter and real-time winding diameter are calculated in combination with the thickness deviation rate, the initial coil diameter and the initial number of coil turns of the coil drum, and then the required real-time unwinding angular velocity and the required real-time winding angular velocity are calculated.

[0011] As a preferred solution: the first distance sensor and the second distance sensor are both ultrasonic sensors.

[0012] As a preferred solution: the controller includes a main control module, and also includes a data acquisition module connected to the main control module, an image processing module, a first motor drive module, a second motor drive module, a light drive module, a communication module, a storage module, a button module and a power supply module.

[0013] A coil material unwinding and rewinding control method, applicable to the coil material unwinding and rewinding device, comprises the following steps:

[0014] S1. Store the material, thickness and initial roll diameter of various types of rolls in the controller;

[0015] S2. Install the coiled material drum onto the unwinding and rewinding device and complete the pre-tensioning of the coiled material;

[0016] S3. The controller controls the illumination lamp to light up and the camera module to capture an image of the coil under the light transmission. The image is processed and recognized to detect the material and thickness of the coil. The coil model is then determined based on the material and thickness of the coil, thereby obtaining the initial coil diameter of the coil drum.

[0017] S4. Determine an initial unwinding diameter based on the initial roll diameter of the web and determine an initial take-up diameter based on the diameter of the take-up drum; determine a web travel speed based on a default printing travel speed, and then calculate an unwinding angular velocity and a take-up angular velocity based on the web travel speed, the initial unwinding diameter, and the initial take-up diameter;

[0018] S5, the controller controls the unloading motor to drive the unloading roller to rotate at the unloading angular velocity, and controls the collecting motor to drive the collecting roller to rotate at the collecting angular velocity;

[0019] S6. During the process of coiling and unwinding the coiled material, the controller gradually increases the unwinding angular velocity according to the position change of the unwinding tensioning roller, and gradually decreases the winding angular velocity according to the position change of the winding tensioning roller, to ensure that the unwinding tensioning roller and the winding tensioning roller are always within their respective preset position ranges.

[0020] As a preferred solution: detect the ambient temperature and humidity during the process of winding and unwinding the coil, obtain the thickness deviation rate of the current model of coil under the ambient temperature and humidity, obtain the real-time number of coil turns on the unwinding roller and the real-time number of coil turns on the receiving roller during the process of winding and unwinding the coil, and calculate the corrected real-time unwinding coil diameter and real-time receiving coil diameter based on the thickness deviation rate, the initial coil diameter and the initial number of coil turns, and then calculate the required real-time unwinding angular velocity and the required real-time receiving angular velocity.

[0021] Compared with the existing technology, the technical solution of the present application has the following beneficial technical effects: the device does not require the operator to manually input the model and initial roll diameter of the coiled material drum before starting the material receiving device. The material receiving and unloading device can automatically identify the model of the coiled material drum and obtain the initial roll diameter, and then automatically complete the calculation of the unloading angular velocity and the receiving angular velocity. This can reduce the operator's operation workload and is conducive to improving the operator's operation and management efficiency of multiple sets of material receiving and unloading devices at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the material receiving and unloading device in Example 1;

[0023] Figure 2 This is a control principle diagram in Example 1.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Unwinding roller; 2. Reversing roller; 3. Unwinding tensioning roller; 4. First distance sensor; 5. Printing table; 6. Rewinding tensioning roller; 7. Second distance sensor; 8. Guide roller; 9. Coil; 10. Rewinding roller; 11. Camera module; 12. Illumination lamp; 13. Temperature and humidity sensor; 14. Photoelectric sensor. DETAILED DESCRIPTION

[0026] Example 1:

[0027] Reference Figure 1 A roll material unwinding and rewinding device includes a frame (not shown in the figure), on which a unwinding roller 1, a unwinding tensioning roller 3, a printing table 5, a rewinding tensioning roller 6 and a rewinding roller 10 are sequentially installed along the conveying direction of the roll material.

[0028] Reversing rollers 2 are installed between the unloading roller 1 and the unloading tensioning roller 3, between the unloading tensioning roller 3 and the printing table 5, between the printing table 5 and the receiving tensioning roller 6, and between the unloading tensioning roller 3 and the receiving roller 10; a guide roller 8 is also installed between the receiving tensioning roller 6 and the receiving roller 10.

[0029] When the material is fed to the feed drum 10 and the feed roller 10 is under the action of the force of the feed roller 2, the feed roller 3 is tightened and the feed roller 3 and the feed roller 6 are lifted up, so that the feed roller 3 and the feed roller 6 are under the action of the force of the feed roller 2.

[0030] A first distance sensor 4 for detecting the position of the unloading tensioning roller 3 is provided on the moving path of the unloading tensioning roller 3. The first distance sensor 4 is connected and fixed to the frame, and the first distance sensor 4 is aligned with the center of the circumferential surface of the unloading tensioning roller 3; a second distance sensor 7 for detecting the position of the unloading tensioning roller 6 is provided on the moving path of the unloading tensioning roller 6. The second distance sensor 7 is connected and fixed to the frame, and the second distance sensor 7 is aligned with the center of the circumferential surface of the unloading tensioning roller 6.

[0031] In this embodiment, the first distance sensor 4 and the second distance sensor 7 are both ultrasonic sensors.

[0032] like Figure 1 As shown, the web unwinding and rewinding device also includes a camera module 11, an illumination light 12, a temperature and humidity sensor 13, and a photoelectric sensor 14 mounted on a frame. The camera module 11 and the illumination light 12 are positioned opposite each other, with the web passing between them. The illumination light 12 illuminates the web, and the camera module 11 captures a translucent image of the web under the illumination. The temperature and humidity sensor 13 detects ambient temperature and humidity. The photoelectric sensor 14 is located along the web conveyor path.

[0033] Reference Figure 2 The coiled material unwinding and rewinding device also includes a controller, which includes a main control module, and also includes a data acquisition module connected to the main control module, an image processing module, a first motor drive module, a second motor drive module, a light drive module, a communication module, a storage module, a key module and a power supply module.

[0034] The output ends of the photoelectric sensor 14, the first distance sensor 4, the second distance sensor 7 and the temperature and humidity detection module are connected to the input end of the data acquisition module; the output end of the light driving module is connected to the irradiation lamp 12; the output end of the first motor driving module is connected to the unloading motor; the output end of the second motor driving module is connected to the receiving motor; the output end of the camera module 11 is connected to the image processing module.

[0035] The coil installation needs to be completed before the device is operated. The specific steps are as follows: the operator installs the coil roll onto the discharge roller, and finally presses the operation button to make the main control module send a control signal to the first motor drive module. At this time, the first motor drive module drives the unloading motor to rotate at its default loading speed; while the unloading motor is rotating, the operator pulls out the head end of the coil roll, and wraps the coil 9 around the unloading tensioning roller 3, the printing table 5, the receiving tensioning roller 6, the receiving roller 10 and each set of reversing rollers 2, and fixes the head end of the coil to the receiving roller 10. After fixing the head end of the coil to the receiving roller 10, press the operation button again. At this time, the main control module sends a control signal to the first motor drive module to stop driving the unloading motor to rotate, thus completing the installation of the coil.

[0036] In this state, the unloading tensioning roller 3 and the receiving tensioning roller 6 are both at their respective lower limit positions under the action of their gravity. There is an excess length of the coil between the unloading roller 1 and the receiving roller 10, and the coil does not reach the expected tension.

[0037] Next is the pre-tensioning step of the coil, specifically: the operator presses a button to feedback a "pre-start signal" to the main control module. At this time, the main control module sends a control signal to the second motor drive module, so that the winding motor drives the unwinding roller 1 to rotate at its default winding speed, and the unwinding motor remains stationary; then the winding roller 10 gradually winds the coil, and the coil is gradually pulled and tightened. During the process of tightening the coil, the tension of the coil drives the unwinding tensioning roller 3 and the winding tensioning roller 6 to start rising.

[0038] During the rising process of the unloading tensioning roller 3, the first distance sensor 4 detects the real-time position of the unloading tensioning roller 3 and feeds back the detected position data to the main control module; during the rising process of the receiving tensioning roller 6, the second distance sensor 7 detects the real-time position of the receiving tensioning roller 6 and feeds back the detected position data to the main control module; the main control module compares the position of the unloading tensioning roller 3 with its preset position range, and compares the position of the receiving tensioning roller 6 with its preset position range. When the positions of the unloading tensioning roller 3 and the receiving tensioning roller 6 are both within their respective preset position ranges, the main control module sends a control signal to the second motor drive module. At this time, the second motor drive module stops driving the receiving motor to rotate, thereby completing the pre-tensioning of the coil.

[0039] After the coil is pre-tensioned, the main control module sends a control signal to the light driving module. At the same time, the main control module controls the camera module 11 to capture the image of the coil. At this time, the light driving module drives the irradiation lamp 12 to light up. The strong light emitted by the irradiation lamp 12 illuminates and penetrates the coil, and the camera module 11 captures an image of the coil under the light and outputs the image data to the image processing module. The image processing module processes the image to identify the material and thickness of the coil.

[0040] The main control module determines the model of the coil by identifying the material and thickness of the coil, and then obtains the initial coil diameter of the coil drum; the initial unwinding coil diameter R1 of the unwinding roller 1 is equal to the initial coil diameter of the coil drum, and the initial winding coil diameter R2 of the winding roller 10 is equal to the diameter of the unwinding roller 1.

[0041] The main control module then calculates the angular velocity ω1 of the unloading motor, i.e., the unloading roller 1, and calculates the angular velocity ω2 of the receiving motor, i.e., the receiving roller 10; wherein ω1R1=ω2R2=V, where V is the default printing speed, i.e., the linear speed of unloading is equal to the linear speed of receiving and equal to the printing speed.

[0042] After the device is started, the main control module sends control signals to the first motor drive module and the second motor drive module, so that the first motor drive module drives the unloading motor to rotate at an angular velocity ω1, and the second motor drive module drives the receiving motor to rotate at an angular velocity ω2, ensuring that the coil moves with appropriate tension.

[0043] During the subsequent coil conveying process, the unwinding coil diameter will gradually become smaller, causing the coil unwinding speed to gradually decrease; while the winding coil diameter will gradually become larger, causing the coil winding speed to gradually increase; and since the coil at the printing table 5 is contacted and pressed down by the printing mechanism, the coil at the printing table 5 maintains a speed V; this will cause the position of the unwinding tensioning roller 3 to gradually rise, while the position of the winding tensioning roller 6 to gradually drop.

[0044] During the process of coiled material unwinding, the main control module gradually increases (PID regulation) the rotational angular velocity of the unwinding motor according to the position change of the unwinding tensioning roller 3, and gradually decreases (PID regulation) the rotational angular velocity of the winding motor according to the position change of the winding tensioning roller 6, to ensure that the unwinding tensioning roller 3 and the winding tensioning roller 6 are always within their respective preset position ranges.

[0045] Through the above scheme, the operator does not need to manually input the model and initial roll diameter of the coiled material drum before starting the material receiving device. The material receiving and unloading device can automatically identify the model of the coiled material drum and obtain the initial roll diameter, and then automatically complete the calculation of the unloading angular velocity and the receiving angular velocity. This can reduce the operator's operation workload and is conducive to improving the operator's operation and management efficiency of multiple sets of material receiving and unloading devices at the same time.

[0046] Considering that under different ambient temperatures and humidities, coils of different materials and thicknesses will deform to varying degrees, causing the thickness of the coil to differ from the factory thickness; when the number of coils is large, even a slight thickness deviation will cause the coil diameter of the coil drum to deviate significantly from the expected diameter. This deviation may affect the calculation accuracy of the unwinding angular velocity and the rewinding angular velocity.

[0047] In order to avoid the above situation, in this embodiment, experiments are carried out in advance under various combinations of ambient temperature and humidity, and the coil diameters of various types of coils (the number of turns is the number of turns when leaving the factory, that is, unused) under the current temperature and humidity environment are measured, that is, the measured coil diameters, and the measured coil diameters are calculated with the initial coil diameters of the coils when leaving the factory to obtain the deviation rate K, K = L / R1, where L is the measured coil diameter and R1 is the initial coil diameter.

[0048] During the operation of the device, each time the main control module calculates the unloading angular velocity and the winding angular velocity, it obtains the real-time number of coil turns Q1 on the unloading roller 1 (real-time number of coil turns = initial number of coil turns - number of motor rotations) and the real-time number of coil turns Q2 on the winding roller 10, and calculates the theoretical real-time unloading coil diameter R10 according to the ratio of Q1 to the initial number of coil turns Q0 of the coil drum and the initial coil diameter R1, R10 = Q1R1 / Q0, and then calculates the actual real-time unloading coil diameter R11, R11 = KQ1R1 / Q0; similarly, the theoretical real-time winding coil diameter R20 is calculated, R20 = Q2R1 / Q0, and then calculates the actual real-time winding coil diameter R21, R21 = KQ2R1 / Q0.

[0049] The required real-time unloading angular velocity ω10 = V / R11, and the required real-time collecting angular velocity ω20 = V / R21.

[0050] The above measures can avoid the situation where the influence of ambient temperature and humidity on the roll thickness leads to large errors in the calculation of the angular velocity of the reeling and unreeling.

[0051] Example 2:

[0052] A method for controlling coiled material unwinding and rewinding, based on the coiled material unwinding and rewinding device in the first embodiment, specifically comprises the following steps:

[0053] S1. Store the material, thickness and initial roll diameter of various types of coils in the controller.

[0054] In reality, the various types of coils produced by coil manufacturers have a specific material and thickness, and their initial coil diameters are also specific. Therefore, by testing the material and thickness of the coil, the type of coil can be determined, and thus the initial coil diameter. The main control module pre-stores data on the material, thickness, and initial coil diameter of various types of coils.

[0055] S2. Install the coiled material drum onto the unwinding and rewinding device and complete the pre-tensioning of the coiled material.

[0056] S3. The controller controls the illumination lamp to light up and controls the camera module to capture the image of the coil under the light transmission. The material and thickness of the coil are detected by image processing and recognition. The model of the coil is determined based on the material and thickness of the coil, and the initial coil diameter of the coil is obtained.

[0057] The image processing process is as follows: the image processing module extracts and identifies the texture characteristics in the image. Since the texture characteristics of different materials are different, the material of the coil can be determined by extracting and identifying the texture characteristics of the coil. At the same time, the image processing module extracts and compares the brightness of the image. Under the same brightness of light, the transmittance of coils of the same material but different thicknesses is different, resulting in different brightness of the backlit surface. Therefore, the thickness of the coil can be determined by the brightness of the image. In this way, by identifying the coil's texture characteristics and brightness, the material and thickness of the coil can be detected. Then, based on the material and thickness of the coil, the model of the coil can be determined, and the initial coil diameter can be obtained.

[0058] S4. Determine the initial unwinding diameter based on the initial roll diameter of the coil and determine the initial take-up diameter based on the diameter of the take-up drum; determine the coil travel speed based on the default printing travel speed, and then calculate the unwinding angular velocity and the take-up angular velocity based on the coil travel speed, the initial unwinding diameter, and the initial take-up diameter.

[0059] S5, the controller controls the unloading motor to drive the unloading roller to rotate at the unloading angular velocity, and controls the collecting motor to drive the collecting roller to rotate at the collecting angular velocity;

[0060] S6. During the process of coiling and unwinding the coiled material, the controller gradually increases the unwinding angular velocity according to the position change of the unwinding tensioning roller, and gradually decreases the winding angular velocity according to the position change of the winding tensioning roller, to ensure that the unwinding tensioning roller and the winding tensioning roller are always within their respective preset position ranges.

[0061] In this embodiment, the ambient temperature and humidity are also detected to obtain the thickness deviation rate of the current model of coil under the ambient temperature and humidity. During the process of coil unwinding and winding, the real-time number of coil turns on the unwinding roller and the real-time number of coil turns on the winding roller are obtained. The corrected real-time unwinding coil diameter and real-time winding coil diameter are calculated in combination with the thickness deviation rate, the initial coil diameter and the initial number of coil turns of the coil drum, and then the required real-time unwinding angular velocity and the required real-time winding angular velocity are calculated.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coiled material unwinding and rewinding device comprising a frame, a discharge roller, a movable discharge tensioning roller, a printing table, a movable rewinding tensioning roller, a rewinding roller, and a controller for controlling a discharge motor and a rewinding motor, the discharge roller and the rewinding roller being driven by the discharge motor and the rewinding motor, respectively, and characterized by: A first distance sensor for detecting the position of the unwinding tensioning roller is provided on the moving path of the unwinding tensioning roller, and a second distance sensor for detecting the position of the unwinding tensioning roller is provided on the moving path of the unwinding tensioning roller. The coil unwinding and winding device further comprises a camera module, an irradiation lamp, a temperature and humidity sensor, and a photoelectric sensor. The camera module and the irradiation lamp are arranged relative to each other, and the coil passes between the camera module and the irradiation lamp. The irradiation lamp is used to emit light to irradiate the coil, and the camera module is used to capture a light-transmitting image of the coil under the irradiation of the light. The first distance sensor, the second distance sensor, the photoelectric sensor and the control The signal input end of the controller is connected, and the irradiation lamp and the camera module are connected to the controller; before the device is operated, the controller controls the irradiation lamp to light up and illuminate the coil and controls the camera module to capture the light-transmitting image of the coil. The controller detects the material and thickness of the coil by image processing and recognition, determines the model of the coil drum according to the material and thickness of the coil, and then obtains the initial coil diameter of the coil drum, determines the initial coil diameter of the unwinding according to the initial coil diameter of the coil drum, and determines the initial coil diameter of the receiving drum according to the diameter of the receiving drum, and then calculates the initial unwinding angular velocity and the initial receiving angular velocity in combination with the default printing speed.

2. The coiled material unwinding device according to claim 1, characterized in that: During the process of coiled material unwinding and rewinding, the controller gradually increases the unwinding angular velocity according to the position change of the unwinding tensioning roller, and gradually decreases the rewinding angular velocity according to the position change of the rewinding tensioning roller, ensuring that the unwinding tensioning roller and the rewinding tensioning roller are always within their respective preset position ranges.

3. The coiled material unwinding and rewinding device according to claim 1, characterized in that: The device also includes a temperature and humidity sensor, which is connected to a controller. The temperature and humidity sensor is used to detect the temperature and humidity values of the environment and feed the temperature and humidity data back to the controller. The controller obtains the thickness deviation rate of the current model of coil under the ambient temperature and humidity. During the process of coil unwinding and unwinding, the controller obtains the real-time number of coil turns on the unwinding roller and the real-time number of coil turns on the receiving roller. The corrected real-time unwinding diameter and real-time receiving diameter are calculated based on the thickness deviation rate, the initial coil diameter and the initial number of coil turns of the coil drum, and then the required real-time unwinding angular velocity and the required real-time receiving angular velocity are calculated.

4. The coiled material unwinding and rewinding device according to claim 1, characterized in that: The first distance sensor and the second distance sensor are both ultrasonic sensors.

5. The coiled material unwinding and rewinding device according to claim 1, characterized in that: The controller includes a main control module, and also includes a data acquisition module, an image processing module, a first motor drive module, a second motor drive module, a light drive module, a communication module, a storage module, a key module and a power supply module connected to the main control module.

6. A coil material unwinding and rewinding control method, applicable to the coil material unwinding and rewinding device according to claim 1, characterized in that: The following steps are involved: S1. Store the material, thickness and initial roll diameter of various types of rolls in the controller; S2. Install the coiled material drum onto the unwinding and rewinding device and complete the pre-tensioning of the coiled material; S3. The controller controls the illumination lamp to light up and the camera module to capture an image of the coil under the light transmission. The image is processed and recognized to detect the material and thickness of the coil. The coil model is then determined based on the material and thickness of the coil, thereby obtaining the initial coil diameter of the coil drum. S4, determining an initial unwinding diameter according to the initial coiling diameter of the coiled material drum and determining an initial receiving coiling diameter according to the diameter of the receiving drum; The coil travel speed is determined based on the default printing travel speed, and the unwinding angular velocity and rewinding angular velocity are calculated based on the coil travel speed, initial unwinding coil diameter, and initial rewinding coil diameter. S5, the controller controls the unloading motor to drive the unloading roller to rotate at the unloading angular velocity, and controls the collecting motor to drive the collecting roller to rotate at the collecting angular velocity; S6. During the process of coiling and unwinding the coiled material, the controller gradually increases the unwinding angular velocity according to the position change of the unwinding tensioning roller, and gradually decreases the winding angular velocity according to the position change of the winding tensioning roller, to ensure that the unwinding tensioning roller and the winding tensioning roller are always within their respective preset position ranges.

7. The coiled material reeling and unreeling control method according to claim 6, characterized in that: During the process of winding and unwinding the coil, the ambient temperature and humidity are detected to obtain the thickness deviation rate of the current model of coil under the ambient temperature and humidity. During the process of winding and unwinding the coil, the real-time number of coil turns on the unwinding drum and the real-time number of coil turns on the winding drum are obtained. Combined with the thickness deviation rate, the initial coil diameter and the initial number of coil turns of the coil drum, the corrected real-time unwinding coil diameter and the real-time winding coil diameter are calculated, and then the required real-time unwinding angular velocity and the required real-time winding angular velocity are calculated.

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