Control method, device, printing device and storage medium

Abstract

The present invention provides a control method, apparatus, printing device, and storage medium, relating to the field of printing technology, and capable of improving paper jams caused by restarting a discharge roller and duplex roller after pausing. The control method is used in a printer, wherein the printer includes a printing path and a side-changing path, wherein the inlet of the side-changing path is connected to the outlet of the printing path, and the outlet of the side-changing path is connected to the inlet of the printing path. The outlet of the printing path is provided with a discharge roller, and the side-changing path is provided with a duplex roller. The printer control method includes: controlling the discharge roller and the duplex roller to stop rotating; when the discharge roller and the duplex roller are controlled to stop rotating, upon receiving a resume transmission instruction, initiating reverse rotation of the discharge roller, and initiating rotation of the duplex roller after a first preset time has passed since initiating reverse rotation of the discharge roller.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to a control method, apparatus, printing device and storage medium. Background Art

[0002] When a duplex printer is printing on both sides of the paper, after the first side is printed, it will return the paper to the paper feed path. This return process is achieved by the eject roller and the duplex roller. However, if the eject roller and duplex roller are restarted after a pause, it may cause a paper jam. Summary of the Invention

[0003] A control method, device, printing equipment and storage medium can improve the paper jam problem caused by restarting a discharge roller and a duplex roller after pausing.

[0004] In a first aspect, a control method is provided for a printer, the printer comprising a printing path and a side-changing path, the inlet of the side-changing path being connected to the outlet of the printing path, the outlet of the side-changing path being connected to the inlet of the printing path, an ejection roller being provided at the outlet of the printing path, and a double-sided roller being provided in the side-changing path, the printer control method comprising: controlling the ejection roller and the double-sided roller to stop rotating; when the ejection roller and the double-sided roller are controlled to stop rotating, if a transmission resumption instruction is received, starting the ejection roller to reverse, and starting the double-sided roller to rotate after a first preset time for starting the ejection roller to reverse.

[0005] In one possible embodiment, controlling the discharge roller and the duplex roller to stop rotating includes: controlling the discharge roller and the duplex roller to stop rotating when the discharge roller is reversed and the duplex roller rotates to allow the print medium to enter the face-changing path or be transported in the face-changing path.

[0006] In one possible embodiment, when the discharge roller is reversed and the duplex roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, controlling the discharge roller and the duplex roller to stop rotating includes: when the end of the print medium is discharged from the outlet of the print path to a first preset position, controlling the discharge roller to reverse, controlling the duplex roller to rotate, so that the print medium enters the side-changing path, and starting timing; if no second-side printing content information is received within a second preset time from the start of timing, controlling the discharge roller and the duplex roller to stop rotating.

[0007] In a possible implementation, the resume transmission instruction is second-side printing content information.

[0008] In a possible implementation, the second preset time is equal to a ratio of a path distance between the double-sided roller and the first preset position to a linear speed of the discharge roller during rotation.

[0009] In one possible embodiment, when the discharge roller is reversed and the double-sided roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: when the discharge roller is reversed and the double-sided roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, if an abnormal instruction is received, controlling the discharge roller and the double-sided roller to stop rotating; the recovery transmission instruction is an abnormal recovery instruction.

[0010] In a possible implementation, the control method further includes: if the front end of the printing medium reaches a second preset position through the surface-changing path, controlling the discharge roller and the double-sided roller to stop rotating.

[0011] In a possible implementation, the first preset time is equal to the time from when the discharge roller is started to when it reaches the maximum rotation speed.

[0012] In a second aspect, a control device is provided for a printer, the printer comprising a printing path and a side-changing path, the entrance of the side-changing path being connected to the exit of the printing path, the exit of the side-changing path being connected to the entrance of the printing path, an ejection roller being provided at the exit of the printing path, and a double-sided roller being provided in the side-changing path, the control device comprising: a pause module for controlling the ejection roller and the double-sided roller to stop rotating; a recovery module for starting the ejection roller to reverse if a recovery transmission instruction is received when controlling the ejection roller and the double-sided roller to stop rotating, and starting the double-sided roller to rotate after a first preset time for starting the ejection roller reversal.

[0013] In a third aspect, a printing device is provided, comprising: a processor, a memory and a printer, the memory being used to store at least one instruction, which is loaded and executed by the processor to implement the above-mentioned control method; the printer comprising a printing path and a side-changing path, the inlet of the side-changing path being connected to the outlet of the printing path, the outlet of the side-changing path being connected to the inlet of the printing path, the outlet of the printing path being provided with a discharge roller, and a double-sided roller being provided in the side-changing path.

[0014] In a possible implementation, the printer further includes: a fixing motor, the fixing motor being used to drive the discharge roller; and a clutch, the clutch being used to drive the double-sided roller.

[0015] In a fourth aspect, a computer storage medium is provided, comprising computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned control method.

[0016] The control method, device, printing equipment and storage medium of the embodiments of the present application start the discharge roller first during the process of the discharge roller and the duplex roller starting from pause, and then start the duplex roller after the discharge roller has been started for a certain period of time. That is, the discharge roller with a slower starting speed can be started first, and the duplex roller can be started after it climbs to reach the target speed. In this way, the paper jam problem caused by the restart process can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a printer in an embodiment of the present application;

[0018] Figure 2 This is a flow chart of a control method in an embodiment of the present application;

[0019] Figure 3 This is a flow chart of a control method in an embodiment of the present application;

[0020] Figure 4 This is a flow chart of a control method in an embodiment of the present application;

[0021] Figure 5 This is a structural block diagram of a control device in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0023] Before describing the embodiments of the present application, the related technologies and problems of the related technologies are first described.

[0024] like Figure 1 As shown, in the related art, a printer includes an eject roller 1 and a duplex roller 2. Duplex roller 2 is driven by a clutch, while eject roller 1 is driven by a stepper motor. Stepper motors are characterized by a ramp-up acceleration process upon startup, while clutch drive requires almost no startup time, meaning the linear speed is consistent with the paper path's transport speed. The paper path's transport speed is driven by a DC motor, which is characterized by its ability to quickly reach the target speed upon startup. Therefore, when eject roller 1 and duplex roller 2 are started simultaneously, duplex roller 2 reaches the target speed first, followed by eject roller 1 some time after startup, resulting in inconsistent speeds at startup. Furthermore, due to the uneven distribution of duplex rollers 2 on the left and right sides of the paper—for example, if duplex roller 2 is absent on the left side but present on the right—during startup, the speed of the left side of the paper is determined by eject roller 1, while the speed of the right side is determined by duplex roller 2. This inconsistent speed can easily lead to paper tilt and jams.

[0025] In order to solve the above problems, the following technical solutions of the embodiments of the present application are provided, and the technical solutions of the embodiments of the present application are described below.

[0026] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a control method for a printer, the printer including a printing path 10 and a surface changing path 20, an inlet 20A of the surface changing path 20 being connected to an outlet 10B of the printing path 10, an outlet 20B of the surface changing path 20 being connected to the inlet 10A of the printing path 10, an outlet 10B of the printing path 10 being provided with a discharge roller 1, and a double-sided roller 2 being provided in the surface changing path 20, the printer control method comprising:

[0027] Step 101: Control the discharge roller 1 and the double-sided roller 2 to stop rotating;

[0028] When the discharge roller 1 and the duplex roller 2 are controlled to stop rotating, if a resume conveying instruction is received, step 102 is executed to start the reverse rotation of the discharge roller 1. After a first preset time has passed since the discharge roller 1 was started to reverse, the duplex roller 2 is started to rotate. The reverse rotation direction of the discharge roller 1 is such that a print medium, such as paper, enters the print path 20, and the rotation direction of the duplex roller 2 is such that the print medium is conveyed from the inlet 20A to the outlet 20B of the print path 20.

[0029] In the control method of the embodiment of the present application, in the process of the discharge roller and the double-sided roller starting from pause, the discharge roller is started first, and the double-sided roller is started after the discharge roller has been started for a certain time. That is, the discharge roller with a slower starting speed can be started first, and after it climbs to reach the target speed, the double-sided roller is started. In this way, the paper jam problem caused during the restart process can be reduced.

[0030] In one possible embodiment, step 101, controlling the discharge roller 1 and the duplex roller 2 to stop rotating includes: controlling the discharge roller 1 and the duplex roller 2 to stop rotating when the discharge roller 1 reverses and the duplex roller 2 rotates so that the printing medium enters the face-changing path 20 or is transmitted in the face-changing path 20.

[0031] In one possible implementation, Figure 3 As shown, during the process in which the discharge roller 1 is reversed and the duplex roller 2 is rotated so that the printing medium enters the face-changing path 20 or is transported in the face-changing path 20, controlling the discharge roller 1 and the duplex roller 2 to stop rotating includes:

[0032] Step 1001: Control the discharge roller 1 to rotate forward so that the print medium is discharged from the outlet 10B of the print path 10;

[0033] Step 1002: When the end of the print medium is discharged from the outlet 10B of the print path 10 to the first preset position A, the discharge roller 1 is controlled to reverse, and the duplex roller 2 is controlled to rotate so that the print medium enters the print path 10, and timing is started.

[0034] Step 1003 determines whether the second-side print content information is received within the second preset time from the start of timing. If not, that is, if the second-side print content information is not received within the second preset time from the start of timing, step 1004 is executed to control the discharge roller 1 and the duplex roller 2 to stop rotating. If the second-side print content information is received within the second preset time from the start of timing, step 103 is executed to continue controlling the discharge roller 1 to reverse and the duplex roller 2 to rotate, thereby continuing printing.

[0035] Specifically, the first preset position A can be the reversal point of the printing medium. That is, during duplex printing, the printing medium is reversed at the first preset position A to print on the second side. Step 1001 is the process of printing the first side of the paper. A corresponding first sensor can be provided at the first preset position A of the printer. The first sensor is used to detect the printing medium at the first preset position A. When the end of the printing medium is discharged from the exit 10B of the printing path 10 to the first preset position A, the printer has completed the printing of the first side of the medium and needs to print on the second side. At this time, a timer is started to determine whether the printer has received the second side printing content information before the printing medium reaches the duplex roller 2. The second side printing content information refers to the content information to be printed on the second side of the printing medium. If the printer receives the second side printing content information, it indicates that the printer is ready to print on the second side and the second side printing process can be continued. If the second side printing content information is not received, it indicates that the printer is not yet ready to print on the second side. Therefore, the discharge roller 1 and the duplex roller 2 are controlled to stop rotating until the printer receives the second side printing content information, and then the second side printing process can be resumed. In this process, step 102 is the step of resuming the second-side printing process. Before this step, the printing medium has not reached the position of the duplex roller 2. Therefore, before the duplex roller 2 rotates, the duplex roller 2 will clamp the front end of the printing medium, but the front end of the printing medium will not move forward until the clutch is started and the duplex roller 2 starts to rotate, so that the duplex roller 2 and the discharge roller 1 drive the front and rear ends of the printing medium at the same speed and at matching speeds, thereby reducing the probability of double-sided paper jams caused by the tilt of the printing medium.

[0036] In a possible implementation, the resume transmission instruction is the second side printing content information, that is, the printer resumes executing the second side printing process after receiving the second side printing content information.

[0037] In one possible embodiment, the second preset time is equal to the ratio of the path distance between the duplex roller 2 and the first preset position A to the linear velocity of the discharge roller. That is, as the print medium begins its return from the first preset position A to the side-swap path 20, if the printer receives information about the second-side print content before the print medium reaches the position of the duplex roller 2, the print medium can continue to be transported without pausing. If the printer still does not receive information about the second-side print content before the print medium reaches the position of the duplex roller 2, the print medium is paused until the second-side print content information is received, at which point the discharge roller 1 and duplex roller 2 are restarted. This second preset time setting maximizes printing efficiency while minimizing the likelihood of paper jams.

[0038] In one possible implementation, Figure 4 As shown, in the process of the discharge roller being reversed and the double-sided roller being rotated so that the printing medium enters the side-changing path or is transported in the side-changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: in the process of the discharge roller being reversed and the double-sided roller being rotated so that the printing medium enters the side-changing path or is transported in the side-changing path, executing step 1005, determining whether an abnormal instruction is received, and if so, that is, if an abnormal instruction is received, executing step 1004, controlling the discharge roller and the double-sided roller to stop rotating, and if not, that is, if no abnormal instruction is received, executing step 103; the recovery transmission instruction is an abnormal recovery instruction.

[0039] Specifically, an exception command is a command generated when a printer malfunctions. That is, after step 1002, as long as the printer malfunctions, the process proceeds to step 1004. The process continues until the malfunction is resolved and a recovery command is received, at which point step 102 is executed to resume duplex printing. During the printer recovery process, the reverse rotation of the discharge roller 1 is first activated. After a first predetermined time has passed since the reverse rotation of the discharge roller 1, the duplex roller 2 is activated, ensuring that the two rollers transport the print media at matching speeds, thereby reducing the likelihood of paper jams.

[0040] In one possible implementation, Figure 3 and Figure 4 As shown, the control method further includes: if the front end of the printing medium reaches the second preset position B through the side-changing path, executing step 104, controlling the discharge roller 1 and the duplex roller 2 to stop rotating. Specifically, for example, a second sensor is provided at the second preset position B, and the second sensor is used to detect the printing medium at the second preset position B. When the second sensor detects the front end of the printing medium, it indicates that the printing medium has completed the side-changing and can then be printed on the second side. At this time, the discharge roller 1 and the duplex roller 2 are paused to implement the next printing process.

[0041] In one possible embodiment, the first preset time is equal to the time from when the discharge roller 1 is started to when it reaches the maximum rotation speed, that is, when the discharge roller 1 reaches the maximum rotation speed, the double-sided roller 2 is controlled to start, so as to improve the printing efficiency while improving the paper jam problem.

[0042] The present application also provides a control device, such as Figure 5 As shown, it is used for a printer, the printer includes a printing path and a side-changing path, the entrance of the side-changing path is connected to the exit of the printing path, the exit of the side-changing path is connected to the entrance of the printing path, the exit of the printing path is provided with an ejection roller, and the side-changing path is provided with a double-sided roller, the control device includes: a pause module 100, used to control the ejection roller and the double-sided roller to stop rotating; a recovery module 200, used to start the ejection roller reversal if a recovery transmission instruction is received when the ejection roller and the double-sided roller are controlled to stop rotating, and start the double-sided roller to rotate after a first preset time for starting the ejection roller reversal.

[0043] The control device can apply the control device in any of the above embodiments. The specific process and principle are the same as those in the above embodiments and will not be repeated here.

[0044] It should be understood that the division of the above control device is only a division of logical functions. In actual implementation, all or part of the modules can be integrated into one physical entity, or they can be physically separated. Moreover, these modules can all be implemented in the form of software called by processing elements; or all of them can be implemented in the form of hardware; or some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, any one of the pause module and the resume module can be a separately established processing element, or it can be integrated into the control device, such as being integrated into a certain chip of the control device. In addition, it can also be stored in the memory of the control device in the form of a program, and called by a certain processing element of the control device to execute the functions of the above modules. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the hardware integrated logic circuit in the processor element or by instructions in the form of software.

[0045] For example, the pause module and the resume module may be one or more integrated circuits configured to implement the above method, such as one or more application-specific integrated circuits (ASICs), one or more digital singular processors (DSPs), or one or more field programmable gate arrays (FPGAs). For another example, when one of the above modules is implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call programs. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0046] In one possible embodiment, controlling the discharge roller and the duplex roller to stop rotating includes: controlling the discharge roller and the duplex roller to stop rotating when the discharge roller is reversed and the duplex roller rotates to allow the print medium to enter the face-changing path or be transported in the face-changing path.

[0047] In one possible embodiment, when the discharge roller is reversed and the duplex roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, controlling the discharge roller and the duplex roller to stop rotating includes: when the end of the print medium is discharged from the outlet of the print path to a first preset position, controlling the discharge roller to reverse, controlling the duplex roller to rotate, so that the print medium enters the side-changing path, and starting timing; if no second-side printing content information is received within a second preset time from the start of timing, controlling the discharge roller and the duplex roller to stop rotating.

[0048] In a possible implementation, the resume transmission instruction is second-side printing content information.

[0049] In a possible implementation, the second preset time is equal to a ratio of a path distance between the double-sided roller and the first preset position to a linear speed of the discharge roller during rotation.

[0050] In one possible embodiment, when the discharge roller is reversed and the double-sided roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: when the discharge roller is reversed and the double-sided roller is rotated to allow the print medium to enter the side-changing path or be transported in the side-changing path, if an abnormal instruction is received, controlling the discharge roller and the double-sided roller to stop rotating; the recovery transmission instruction is an abnormal recovery instruction.

[0051] In a possible implementation, the pause module 100 is further configured to control the discharge roller and the duplex roller to stop rotating if the front end of the printing medium reaches the second preset position through the surface-changing path.

[0052] In a possible implementation, the first preset time is equal to the time from when the discharge roller is started to when it reaches the maximum rotation speed.

[0053] An embodiment of the present application also provides a printing device, including: a processor, a memory and a printer, the memory is used to store at least one instruction, and the instruction is loaded and executed by the processor to implement the above-mentioned control method; the printer includes a printing path 10 and a surface changing path 20, the entrance of the surface changing path 20 is connected to the exit of the printing path 10, and the exit of the surface changing path 20 is connected to the entrance of the printing path 10, and the exit of the printing path 10 is provided with a discharge roller 1, and a double-sided roller 2 is provided in the surface changing path 20.

[0054] The number of processors may be one or more, for example, the processor may include an image signal processor (ISP). The processor and the memory may be connected via a bus or other means. The memory, as a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as the program instructions / modules corresponding to the control device in the embodiment of the present application. The processor executes various functional applications and data processing by running the non-transitory software programs, instructions and modules stored in the memory, that is, implements the method in any of the above method embodiments. The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; and necessary data, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device.

[0055] In a possible implementation, the printer further includes: a fixing motor, which is used to drive the discharge roller 1 ; and a clutch, which is used to drive the double-sided roller 2 .

[0056] An embodiment of the present application further provides a computer storage medium comprising computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned control method.

[0057] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described herein are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive).

[0058] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0059] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A control method, characterized in that: For a printer, the printer includes a printing path and a side-changing path, the inlet of the side-changing path is connected to the outlet of the printing path, the outlet of the side-changing path is connected to the inlet of the printing path, the outlet of the printing path is provided with a discharge roller, and the side-changing path is provided with a double-sided roller, and the printer control method includes: controlling the discharge roller and the double-sided roller to stop rotating; When the ejection roller and the double-sided roller are controlled to stop rotating, if a transmission resumption instruction is received, the ejection roller is started to rotate in reverse, and the double-sided roller is started to rotate after a first preset time after the ejection roller is started to rotate in reverse; The controlling the discharge roller and the double-sided roller to stop rotating includes: When the discharge roller is reversed and the duplex roller is rotated so that the printing medium enters the surface changing path or is transported in the surface changing path, the discharge roller and the duplex roller are controlled to stop rotating; Wherein, in the process where the discharge roller is reversed and the double-sided roller is rotated so that the printing medium enters the surface changing path or is transported in the surface changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: When the end of the printing medium is discharged from the outlet of the printing path to a first preset position, the discharge roller is controlled to reverse, the duplex roller is controlled to rotate, so that the printing medium enters the side-changing path, and timing is started; the first preset position is the reversal point of the printing medium; If the second side print content information is not received within a second preset time from the start of the timing, controlling the discharge roller and the double-sided roller to stop rotating; The resume transmission instruction is the second side printing content information.

2. The method according to claim 1, characterized in that The second preset time is equal to a ratio of a path distance between the double-sided roller and the first preset position to a linear speed of the discharge roller when the discharge roller rotates.

3. The method according to claim 1, characterized in that During the process in which the discharge roller is reversed and the double-sided roller is rotated so that the print medium enters the side-changing path or is transported in the side-changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: When the discharge roller is reversed and the duplex roller is rotated so that the print medium enters the side-changing path or is transported in the side-changing path, if an abnormal instruction is received, the discharge roller and the duplex roller are controlled to stop rotating; The transmission recovery instruction is an abnormality recovery instruction.

4. The method according to any one of claims 1 to 3, characterized in that Also includes: If the front end of the printing medium reaches a second preset position through the surface-changing path, the discharge roller and the double-sided roller are controlled to stop rotating.

5. The method according to any one of claims 1 to 3, characterized in that The first preset time is equal to the time from when the discharge roller is started to when it reaches the maximum rotation speed.

6. A control device, characterized in that: For a printer, the printer includes a printing path and a side-changing path, the inlet of the side-changing path is connected to the outlet of the printing path, the outlet of the side-changing path is connected to the inlet of the printing path, the outlet of the printing path is provided with a discharge roller, and the side-changing path is provided with a double-sided roller, the control device includes: A pause module, used for controlling the discharge roller and the double-sided roller to stop rotating; a recovery module, configured to, when the ejection roller and the double-sided roller are controlled to stop rotating, start the reverse rotation of the ejection roller upon receiving a recovery transmission instruction, and start the rotation of the double-sided roller after a first preset time has passed since the ejection roller was started to reverse; The controlling the discharge roller and the double-sided roller to stop rotating includes: When the discharge roller is reversed and the duplex roller is rotated so that the printing medium enters the surface changing path or is transported in the surface changing path, the discharge roller and the duplex roller are controlled to stop rotating; Wherein, in the process where the discharge roller is reversed and the double-sided roller is rotated so that the printing medium enters the surface changing path or is transported in the surface changing path, controlling the discharge roller and the double-sided roller to stop rotating includes: When the end of the printing medium is discharged from the outlet of the printing path to a first preset position, the discharge roller is controlled to reverse, the duplex roller is controlled to rotate, so that the printing medium enters the side-changing path, and timing is started; the first preset position is the reversal point of the printing medium; If the second side print content information is not received within a second preset time from the start of the timing, controlling the discharge roller and the double-sided roller to stop rotating; The resume transmission instruction is the second side printing content information.

7. A printing device, characterized in that: include: A processor, a memory, and a printer, wherein the memory is used to store at least one instruction, and when the instruction is loaded and executed by the processor, it implements the control method according to any one of claims 1 to 5; The printer includes a printing path and a side-changing path. The inlet of the side-changing path is connected to the outlet of the printing path, and the outlet of the side-changing path is connected to the inlet of the printing path. The outlet of the printing path is provided with a discharge roller, and a double-sided roller is provided in the side-changing path.

8. The printing device according to claim 7, wherein: The printer further comprises: a fixing motor configured to drive the discharge roller; A clutch is used to drive the double-sided roller.

9. A computer storage medium, characterized in that The method comprises computer instructions, which, when executed on an electronic device, enable the electronic device to execute the control method according to any one of claims 1 to 5.

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