Control method and device of print medium conveying mechanism, and printing apparatus

Abstract

The present application relates to inkjet printing technology field, solved the existing cannot reliably and stably to print medium in different directions of positive and negative transport technical problem, provided print medium transport mechanism control method, device and printing equipment, print medium transport mechanism includes: the first rotation mechanism with first rotation axis and first motor, the second rotation mechanism with second rotation axis and second motor and the third rotation mechanism with third rotation axis and third motor are sequentially arranged, wherein, first motor, second motor and third motor have first rotation linear speed V1, second rotation linear speed V2 and third rotation linear speed V3, print medium transport mechanism control method includes: when conveying print medium in first direction transport mode and second direction transport mode respectively, then correspondingly control each motor in two opposite rotation directions respectively meet: V2 greater than or equal to V3 greater than or equal to V1 and V2 greater than or equal to V1 greater than or equal to V3.The present application has the advantage of reliably and stably conveying print medium in different directions of positive and negative.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and in particular to a control method, apparatus, and printing equipment for a printing media delivery mechanism. Background Technology

[0002] Inkjet printing technology refers to the technology of spraying ink droplets onto a printing medium through a printhead to obtain images or text. This technology is non-contact printing and has advantages such as high printing speed, low pollution, vibrant image colors, long image preservation time, and adaptability to various printing media. It has been widely used in advertising production, office supplies and equipment, and printing proofing.

[0003] In single-pass roll printing, the printing media is typically transported through friction between the media and the surfaces of various transmission components. Since the printing media, as roll material, is in the form of a reel during printing, the feeding and take-up radii are constantly changing. When the media is transported in only one direction, this can be addressed by setting different speed differences among the transmission components. However, there is currently no corresponding design developed for situations where the media also needs to be transported in the opposite direction. Many manufacturers and users using single-pass printing generally require paper ejection to check the printing effect or support forward and reverse printing functions, which means that existing printing technology cannot provide the forward and reverse transport function of the printing media that customers expect.

[0004] Therefore, there is an urgent need to provide a control method, device, and printing equipment for a printing media delivery mechanism that can reliably and stably deliver printing media in both forward and reverse directions. Summary of the Invention

[0005] To address the shortcomings of the prior art, this invention provides a control method for a printing media conveying mechanism. The printing media conveying mechanism includes a first rotating mechanism, a second rotating mechanism, and a third rotating mechanism arranged sequentially. The first rotating mechanism includes a first rotating shaft and a first motor rotatably connected; the second rotating mechanism includes a second rotating shaft and a second motor rotatably connected; and the third rotating mechanism includes a third rotating shaft and a third motor rotatably connected. The first motor has a first linear rotational velocity V1, the second motor has a second linear rotational velocity V2, and the third motor has a third linear rotational velocity V3. The two ends of the printing media are wound onto the first and third rotating mechanisms in a roll form, respectively. The control method includes: determining whether the printing media is conveyed in a first-direction conveying mode or a second-direction conveying mode, wherein the first direction is opposite to the second direction; when the printing media is conveyed in the first-direction conveying mode, controlling the first, second, and third motors to rotate in the first rotational direction while satisfying: V2 ≥ V3 ≥ V1; when the printing media is conveyed in the second-direction conveying mode, controlling the first, second, and third motors to rotate in the second rotational direction opposite to the first rotational direction while satisfying: V2 ≥ V1 ≥ V3.

[0006] Furthermore, the first motor and the third motor are respectively equipped with a first clutch and a second clutch; in the step of determining whether to transport the printing medium in a first direction transport mode or a second direction transport mode, the operation of the first clutch and the second clutch is also included to realize that the first motor and the third motor switch synchronously between the first rotation direction and the second rotation direction.

[0007] Furthermore, the printing media conveying mechanism also includes a first sensor and a second sensor for detecting the first radius value R1 and the second radius value R2 of the printing media wound on the first rotating shaft and the third rotating shaft, respectively; when the printing media is conveyed in the first direction conveying mode, the steps include: dynamically adjusting the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2; when the printing media is conveyed in the second direction conveying mode, the steps include: dynamically adjusting the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2.

[0008] Furthermore, the first motor, the second motor, and the third motor are configured with pulses per second of W1, W2, and W3, respectively, and pulses per revolution of P1, P2, and P3, respectively. The transmission diameters of the first motor, the second motor, and the third motor are D1, D2, and D3, respectively, where D1 = 2R1 and D3 = 2R2. When conveying the printing medium in the first direction conveying mode, the steps include: dynamically adjusting W1 and W3 based on the obtained R1 and R2 detection values ​​to satisfy: V2 ≥ V3 ≥ V1. When conveying the printing medium in the second direction conveying mode, the steps include: dynamically adjusting W1 and W3 based on the obtained R1 and R2 detection values ​​to satisfy: V2 ≥ V1 ≥ V3.

[0009] Furthermore, the printing media conveying mechanism also includes: a fourth rotating mechanism and a fifth rotating mechanism. The fourth rotating mechanism is disposed between the first rotating mechanism and the second rotating mechanism, and the fifth rotating mechanism is disposed between the second rotating mechanism and the third rotating mechanism. The fourth rotating mechanism includes a fourth rotating shaft and a fourth motor rotatably connected together; the fifth rotating mechanism includes a fifth rotating shaft and a fifth motor rotatably connected together. The fourth motor has a fourth rotational linear velocity V4, and the fifth motor has a fifth rotational linear velocity V5. When conveying the printing media in the first direction conveying mode, the steps include controlling each motor to rotate in the first rotational direction and satisfying: V2=V5≥V3≥V4=V1. When conveying the printing media in the second direction conveying mode, the steps include controlling each motor to rotate in the second rotational direction and satisfying: V2=V4≥V1≥V5=V3.

[0010] Furthermore, the printing media delivery mechanism also includes a printing platform, which is disposed between the first and second rotating mechanisms and is used to support the movement of the printing media, so that the printing media receives ink from the printhead located on the printing carriage at an ink ejection speed V. 喷 Inkjet printing; when the printing media is conveyed in a first-direction conveying mode, the steps include controlling V2 and V... 喷 When matching, the steps include controlling V2 and V when conveying the printing media in the second direction delivery mode. 喷 Matching.

[0011] Furthermore, when conveying the printing media in the first direction conveying mode, the steps include controlling V2 in V 喷 The maximum speed V supported by the inkjet waveform 极 Within; when conveying printing media in the second direction conveying mode, the steps include controlling V2 in V 喷 The maximum speed V supported by the inkjet waveform 极 Within.

[0012] To achieve another objective of the present invention, the present invention also provides a control device for a printing media conveying mechanism. The control device includes: a mode determination module for determining whether to operate in a first direction conveying mode or a second direction conveying mode; and a motor control module for controlling the rotation of a first motor, a second motor, and a third motor, wherein the first motor has a first rotational linear velocity V1, the second motor has a second rotational linear velocity V2, and the third motor has a third rotational linear velocity V3. When the mode determination module determines that the printing media is conveyed in the first direction conveying mode, the motor control module correspondingly controls the first motor, the second motor, and the third motor to rotate in the first rotational direction and satisfy: V2≥V3≥V1. When the mode determination module determines that the printing media is conveyed in the second direction conveying mode, the motor control module correspondingly controls the first motor, the second motor, and the third motor to rotate in the second rotational direction and satisfy: V2≥V1≥V3.

[0013] To achieve another objective of the present invention, the present invention also provides a printing device, the printing device comprising: a printhead, a controller, and a printing media delivery mechanism, wherein the controller controls the operation of the printhead and the printing media delivery mechanism respectively, characterized in that the controller executes any of the above control methods.

[0014] The beneficial effects of the control method, device and printing equipment of the printing media conveying mechanism of the present invention are as follows: by controlling the speed and forward and reverse rotation of the first motor, the second motor and the third motor, the printing media is kept in an appropriate tension state during the conveying process, which can avoid the printing media from curling, being over-tightened or tearing, thereby realizing bidirectional printing and stable multi-rotation axis material collection. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0016] Figure 1 A schematic diagram of the structure of the printing media delivery mechanism controlled by the control method of the printing media delivery mechanism of the present invention;

[0017] Figure 2 This is a flowchart illustrating the control method for the printing media delivery mechanism of the present invention;

[0018] Figure 3 This is a detailed flowchart illustrating the first direction conveying mode steps of the control method for the printing media conveying mechanism of the present invention.

[0019] Figure 4This is a detailed flowchart illustrating the second-direction conveying mode steps of the control method for the printing media conveying mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the control device for the printing media delivery mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the control device for the printing media delivery mechanism of the present invention;

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-First rotating shaft; 2-Second rotating shaft; 3-Third rotating shaft; 4-First sensor; 5-Second sensor; 6-Printer head; 7-Belt; 20-Control device for printing media delivery mechanism; 201-Mode determination module; 202-Motor control module; 701-Processor; 702-Memory; 703-Communication interface; 710-Bus. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, various features in the embodiments and examples of this invention can be combined with each other, all within the scope of protection of this invention.

[0025] refer to Figures 1 to 4As an objective of this invention, a control method for a printing media conveying mechanism is provided. This printing media conveying mechanism includes a first rotating mechanism, a second rotating mechanism, and a third rotating mechanism arranged sequentially along a first direction. The first rotating mechanism includes a first rotating shaft 1 rotatably connected to a first motor; the second rotating mechanism includes a second rotating shaft 2 rotatably connected to a second motor (not shown); and the third rotating mechanism includes a third rotating shaft 3 rotatably connected to a third motor (not shown). The first motor has a first rotational linear velocity V1, the second motor has a second rotational linear velocity V2, and the third motor has a third rotational linear velocity V3. Each rotating shaft has a rubber roller that rotates and rubs against the printing media, and rotates under the drive of the corresponding motor. The printing media, as roll material, is wound in a roll form around the first and third rotating mechanisms. The control method for the printing media conveying mechanism includes the following steps: S10: determining the mode; S20: determining to convey the printing media in a first-direction conveying mode; and S3... 0: Determine whether to convey the printing medium in the second direction conveying mode. In the mode determination step S10, it is determined whether to convey the printing medium in the first direction conveying mode or the second direction conveying mode. The first direction is opposite to the second direction. In step S20, when conveying the printing medium in the first direction conveying mode, the first motor, the second motor and the third motor are controlled to rotate in the first rotation direction and satisfy: V2≥V3≥V1. In this invention, the first direction can also be said to be the forward printing direction, and the first rotation direction can also be said to be the forward rotation direction of each motor. The printing medium only needs to be a material that can be properly stretched and conveyed and accepted for inkjet printing. Therefore, by controlling the rotational linear speed of each motor to satisfy the above inequality, there will be no situation where the receiving speed of the printing medium by the third motor is slower than the printing speed, causing the printing medium to curl between the second motor and the third motor, nor will there be a situation where the feeding speed of the printing medium by the first motor is faster than the printing speed, causing the printing medium to curl between the first motor and the second motor. Correspondingly, in step S30, when the printing medium is conveyed in the second direction conveying mode, the first motor, the second motor, and the third motor are all controlled to rotate in the second rotation direction opposite to the first rotation direction and satisfy: V2≥V1≥V3. In this invention, the second direction can also be said to be the reverse printing direction, and the second rotation direction can also be said to be the reverse direction of each motor. Similarly, it is ensured that when the first motor receives the printing medium, there will be no situation where the receiving speed is slower than the printing speed, causing the printing medium to curl between the first motor and the second motor, nor will there be a situation where the feeding speed of the third motor to deliver the printing medium is faster than the printing speed, causing the printing medium to curl between the second motor and the third motor.Furthermore, in the forward printing direction, the first motor, the second motor, and the third motor can be understood as the feeding motor, the receiving motor, and the drive motor, respectively. In the reverse printing direction, the first motor, the second motor, and the third motor can be understood as the drive motor, the receiving motor, and the feeding motor, respectively. The control method of this invention controls the linear speed of the receiving motor to be no less than the linear speed of the drive motor and the linear speed of the drive motor to be no less than the linear speed of the feeding motor during printing in both forward and reverse directions. In addition, the linear speeds of each rotating shaft can be kept basically consistent while ensuring that the printing medium does not curl, become excessively tense, or tear. It should be noted that, in order to further ensure that the printing medium does not curl, become excessively tense, or tear, it is preferable that, for the printing medium being transported in the first direction transport mode, V2 > V3 > V1, and for the printing medium being transported in the second direction transport mode, V2 > V1 > V3. The upper limit of the difference in the linear speeds of each motor in the two transport modes is the normal expansion and contraction of the printing medium plus the expansion and contraction under the current tension limit / the corresponding motor rotation time difference. In summary, for single-pass roll printing processes, the control method of this invention can reliably transport the printing medium in both forward and reverse directions, thereby meeting the requirements for paper ejection to check the printing effect or supporting forward and reverse printing functions.

[0026] Preferably, the first motor and the third motor are respectively equipped with a first clutch and a second clutch; the mode determination step S10, which is the step of determining whether to transport the printing medium in a first direction transport mode or a second direction transport mode, further includes the step of controlling the operation of the first clutch (not shown) and the second clutch (not shown) to achieve synchronous forward or reverse rotation of the first motor and the third motor. Therefore, by controlling the operating state of the first clutch and the second clutch, the forward and reverse rotation of the first motor and the third motor can be conveniently adjusted, thereby reliably realizing forward and reverse printing.

[0027] Please refer to further information. Figure 1 , Figure 3 and Figure 4Preferably, the printing media conveying mechanism further includes a first sensor 4 and a second sensor 5 that detect the first radius value R1 and the second radius value R2 of the printing media wound on the first rotating shaft 1 and the third rotating shaft 3, respectively. In this invention, the first sensor 4 and the second sensor 5 are described as encoders. Step S20 further includes step S21: dynamically adjusting the values ​​of V1, V2, and V3 based on the detected values ​​of R1 and R2. Step S30 further includes step S31: dynamically adjusting the values ​​of V1, V2, and V3 based on the detected values ​​of R1 and R2. For example, the first motor and the third motor drive the shafts of the first sensor 4 and the second sensor 5 to rotate, the encoder counts, and transmits the data to the processor (which will be further explained below). The angular velocity corresponding to the first radius value R1 or the second radius value R2 of the current roll material is calculated through encoder feedback: V 角 = (N1 – N2) / t; where N1 is the current encoder value, N2 is the previous encoder value, and t is the time interval between the two acquisitions. Then, the remaining radius of the current roll is calculated as: R 1剩 =V1 / V 角 Or R 2剩 =V3 / V 角 In this way, when the roll diameter changes, the processor can control the speed of each motor to adapt to the roll diameter, maintaining a constant tension on the printing medium. By setting each sensor to measure and calculate the remaining radius at both ends of the roll, the speed of each motor can be controlled using this data. Thus, the tension of the roll can remain constant throughout the entire feeding and take-up process, which can avoid both tearing and curling of the roll.

[0028] Specifically, the first, second, and third motors are configured with pulses per second of W1, W2, and W3 respectively, and pulses per revolution of P1, P2, and P3 respectively. The transmission diameters of the first, second, and third motors are D1, D2, and D3 respectively, where D1 = 2R1 and D3 = 2R2. It can be known that V1 = W1*60 / P1*π*D1, V2 = W2*60 / P2*π*D2, and V3 = W3*60 / P3*π*D3. Taking forward printing, or conveying the printing medium in the first direction transport mode, as an example, the condition must be met: V2>=V3>=V1; that is, W2*60 / P2*π*D2 >= W3*60 / P3*π*D3>= W1*60 / P1*π*D1, thus we get: W2 / P2*π*D2>=W3 / P3*π*D3>= W1 / P1π*D1; Since P1, P2, and P3 are fixed values, when the first sensor 4 and the second sensor 5 detect changes in D1 and D3 during forward printing, W1 and W3 are adjusted according to the same displacement principle. Specifically, when the number of pulses per revolution of the motor is N, the circumference corresponding to the radius of the rotating shaft is L, and the corresponding pulse displacement component is: L / N= p. Therefore, when the number of pulses per second is M, according to p*M = V, the V value corresponding to R1 or R2 can be obtained. Therefore, by adjusting W1 and W3, the entire printing system can always be in a state that satisfies the condition: V2≥V3≥V1, thus preventing the printing medium delivered during forward printing from curling, becoming overly taut, or tearing. For reverse printing, or printing media delivered in a second direction mode, the following condition must be met: V2≥V1≥V3. The specific details can be derived similarly from the above, and will not be repeated here.

[0029] Preferably, the printing media conveying mechanism further includes a fourth rotating mechanism (not shown) and a fifth rotating mechanism (not shown). The fourth rotating mechanism is disposed between the first rotating mechanism and the second rotating mechanism, and the fifth motor rotating mechanism is disposed between the second rotating mechanism and the third rotating mechanism. The fourth rotating mechanism includes a fourth rotating shaft and a fourth motor rotatably connected together; the fifth rotating mechanism includes a fifth rotating shaft and a fifth motor rotatably connected together. The fourth motor has a fourth rotational linear velocity V4, and the fifth motor has a fifth rotational linear velocity V5. Step S20 further includes controlling each motor to rotate in a first rotational direction and satisfying: V2=V5≥V3≥V4=V1. Step S30 further includes controlling each motor to rotate in a second rotational direction and satisfying: V2=V4≥V1≥V5=V3. In this way, for cases where the printing media conveying distance is long, the reliability of supporting and conveying the printing media can be improved by setting the fourth rotating mechanism and the fifth rotating mechanism, and the control of the rotational speed of each motor can ensure that the printing media will not curl, become overly taut, or tear. Furthermore, based on the above description, in order to further ensure that the printing media does not curl, become excessively taut, or tear during transport, it is also preferable that, for the printing media transported in the first direction transport mode, the following conditions are met: V2=V5>V3>V4=V1, and for the printing media transported in the second direction transport mode, the following conditions are met: V2=V4>V1>V5=V3.

[0030] Preferably, step S20 further includes the step of controlling the first motor, the second motor, and the third motor to stop working sequentially when R1 decreases to a predetermined R1min, and step S30 further includes the step of controlling the third motor, the second motor, and the first motor to stop working sequentially when R2 decreases to a predetermined R2min.

[0031] Please refer to further information. Figure 1 The printing media delivery mechanism also includes a printing platform, which is positioned between the first and second rotating mechanisms and supports the movement of the printing media. The printing platform is driven by belts 7 connected to various motors, allowing the printing media to receive ink from the printheads 6 located on the printing carriage at an ink ejection speed V. 喷 Inkjet printing; both steps S20 and S30 further include the step of controlling V2 and V 喷 A good match. Furthermore, due to the inkjet speed V... 喷 Determined by the inkjet waveform, the printing speed, V2, generally needs to be less than the maximum speed of the inkjet frequency corresponding to that waveform. The upper limit of the printing speed supported by the corresponding inkjet waveform varies depending on the printing precision. Therefore, the normal printing speed V2 should be controlled within the range of the inkjet speed V... 喷 The inkjet waveform supports a maximum speed V. 极 Within, that is, V2≤V 极 This implements V2 and V 喷 This ensures a perfect match between the printing media delivery speed and the inkjet output of the printhead 6, resulting in excellent print quality.

[0032] refer to Figure 5 As another objective of this invention, a control device for a printing media delivery mechanism is provided. This control device includes a mode determination module and a motor control module. The mode selection module is used to control the selection of operation in either a first-direction delivery mode or a second-direction delivery mode. The motor control module is used to control the rotation of a first motor, a second motor, and a third motor. The first motor has a first linear rotational velocity V1, the second motor has a second linear rotational velocity V2, and the third motor has a third linear rotational velocity V3. When the mode determination module determines to deliver the printing media in the first-direction delivery mode, the motor control module correspondingly controls the first motor, the second motor, and the third motor to rotate in the first rotational direction, satisfying: V2 ≥ V3 ≥ V1. When the mode determination module determines to deliver the printing media in the second-direction delivery mode, the motor control module correspondingly controls the first motor, the second motor, and the third motor to rotate in the second rotational direction, satisfying: V2 ≥ V1 ≥ V3. This control device can achieve the beneficial effects of any of the above control methods, which will not be elaborated further here.

[0033] As another objective of the present invention, the present invention also discloses a printing device, which includes: a printhead, a controller, and a printing media delivery mechanism. The controller controls the operation of the printhead and the printing media delivery mechanism respectively. The controller executes any of the above control methods. The printing device can obtain the beneficial effects of any of the above control methods, which will not be elaborated here.

[0034] refer to Figure 6 As another objective of the present invention, the present invention also discloses a control device for a printing media delivery mechanism, comprising: at least one processor 701, at least one memory 702, and computer program instructions stored in the memory, wherein the control method of this embodiment is implemented when the computer program instructions are executed by the processor.

[0035] Specifically, the processor 701 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of the present invention.

[0036] Memory 702 may include mass storage for data or instructions. For example, and not limitingly, memory 702 may include a hard disk drive (HDD), a floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 702 may include removable or non-removable (or fixed) media. Where appropriate, memory 702 may be internal or external to a data processing device. In a particular embodiment, memory 702 is a non-volatile solid-state memory. In a particular embodiment, memory 702 includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0037] The processor 701 implements the control method of the printing media delivery mechanism in the above embodiment by reading and executing computer program instructions stored in the memory 702.

[0038] In one example, the control device for the printing media delivery mechanism may further include a communication interface 703 and a bus 710. For example, Figure 6 As shown, the processor 701, memory 702, and communication interface 703 are connected through bus 710 and complete communication with each other.

[0039] The communication interface 703 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0040] Bus 710 includes hardware, software, or both, that couples components of the control equipment for the print media delivery mechanism together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 710 may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0041] Furthermore, in conjunction with the control method of the printing media delivery mechanism in the above embodiments, the present invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the control methods of the printing media delivery mechanism in the above embodiments.

[0042] In summary, the control method, device, and printing equipment for the printing media conveying mechanism provided in the embodiments of the present invention, by controlling the rotation and speed of the first motor, the second motor, and the third motor in the first rotation direction or the second rotation direction respectively to satisfy: V2≥V3≥V1 and V2≥V1≥V3, can reliably convey the printing media in the forward or reverse direction, and realize the stability of bidirectional printing and multi-rotation axis material collection.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0044] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0045] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0046] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0047] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A control method for a printing media delivery mechanism, wherein the printing media delivery mechanism comprises a first rotating mechanism, a second rotating mechanism, and a third rotating mechanism arranged sequentially, wherein, The first rotating mechanism includes a first rotating shaft and a first motor rotatably connected; the second rotating mechanism includes a second rotating shaft and a second motor rotatably connected; and the third rotating mechanism includes a third rotating shaft and a third motor rotatably connected. The first motor has a first linear rotational velocity V1, the second motor has a second linear rotational velocity V2, and the third motor has a third linear rotational velocity V3. The two ends of the printing medium are respectively wound onto the first rotating mechanism and the third rotating mechanism in a roll form. The control method includes: It determines whether the printing media is transported in a first-direction transport mode or a second-direction transport mode, wherein the first direction and the second direction are opposite; When the printing medium is conveyed in the first direction conveying mode, the first motor, the second motor and the third motor are controlled to rotate in the first rotation direction and satisfy: V2≥V3≥V1; When the printing medium is conveyed in the second direction conveying mode, the first motor, the second motor and the third motor are controlled to rotate in the second rotation direction opposite to the first rotation direction and satisfy: V2≥V1≥V3; The printing media conveying mechanism further includes a first sensor and a second sensor for detecting a first radius value R1 and a second radius value R2 of the printing media wound on the first rotating shaft and the third rotating shaft, respectively; the step of conveying the printing media in the first direction conveying mode includes: dynamically adjusting the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2; the step of conveying the printing media in the second direction conveying mode includes: dynamically adjusting the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2.

2. The control method according to claim 1, characterized in that, The first motor and the third motor are respectively equipped with a first clutch and a second clutch; in the step of determining whether to transport the printing medium in a first direction transport mode or a second direction transport mode, the operation of the first clutch and the second clutch is further included to realize that the first motor and the third motor switch synchronously between the first rotation direction and the second rotation direction.

3. The control method according to claim 1, characterized in that, The first motor, the second motor, and the third motor are configured with pulses per second of W1, W2, and W3, respectively, and pulses per revolution of P1, P2, and P3, respectively. The transmission diameters corresponding to the first motor, the second motor, and the third motor are D1, D2, and D3, respectively, where D1 = 2R1 and D3 = 2R2. The step of conveying the printing medium in the first direction conveying mode includes: dynamically adjusting W1 and W3 based on the obtained R1 and R2 detection values ​​to satisfy: V2 ≥ V3 ≥ V1. The step of conveying the printing medium in the second direction conveying mode includes: dynamically adjusting W1 and W3 based on the obtained R1 and R2 detection values ​​to satisfy: V2 ≥ V1 ≥ V3.

4. The control method according to any one of claims 1 to 3, characterized in that, The printing media conveying mechanism further includes: a fourth rotating mechanism and a fifth rotating mechanism. The fourth rotating mechanism is disposed between the first rotating mechanism and the second rotating mechanism, and the fifth rotating mechanism is disposed between the second rotating mechanism and the third rotating mechanism. The fourth rotating mechanism includes a fourth rotating shaft and a fourth motor rotatably connected together. The fifth rotating mechanism includes a fifth rotating shaft and a fifth motor rotatably connected together. The fourth motor has a fourth rotational linear velocity V4, and the fifth motor has a fifth rotational linear velocity V5. The step of conveying the printing media in the first direction conveying mode includes controlling each motor to rotate in the first rotational direction and satisfying: V2=V5≥V3≥V4=V1. The step of conveying the printing media in the second direction conveying mode includes controlling each motor to rotate in the second rotational direction and satisfying: V2=V4≥V1≥V5=V3.

5. The control method according to claim 1, characterized in that, The step of conveying the printing medium in the first direction conveying mode further includes: when R1 decreases to a predetermined R 1min When the printing medium is conveyed in the second direction conveying mode, the first motor, the second motor, and the third motor are controlled to stop working in sequence. The step of conveying the printing medium in the second direction conveying mode further includes: when R2 decreases to a predetermined R 2min At that time, the third motor, the second motor, and the first motor are controlled to stop working in sequence.

6. The control method according to claim 1, characterized in that, The printing media delivery mechanism also includes a printing platform, which is positioned between the first and second rotating mechanisms and supports the movement of the printing media, allowing the printing media to receive ink from a printhead located on the printing carriage at an ink ejection speed V. 喷 The inkjet printing; the step of conveying the printing medium in the first direction conveying mode includes controlling V2 and V... 喷 Matching the steps, the step of conveying the printing media in the second direction conveying mode includes controlling V2 and V... 喷 Matching.

7. The control method according to claim 6, characterized in that, The step of conveying the printing medium in the first direction conveying mode includes controlling V2 in V 喷 The maximum speed V supported by the inkjet waveform 极 Within; the step of conveying the printing medium in the second direction conveying mode includes controlling V2 in V 喷 The maximum speed V supported by the inkjet waveform 极 Within.

8. A control device for a printing media delivery mechanism, characterized in that, The printing media delivery mechanism also includes a first sensor and a second sensor to detect the first radius value R1 and the second radius value R2 of the printing media wound on the first rotating shaft and the third rotating shaft, respectively; the control device includes: The mode determination module is used to determine whether to operate in the first direction conveying mode or the second direction conveying mode; The motor control module is used to control the rotation of the first motor, the second motor and the third motor. The first motor has a first rotational linear velocity V1, the second motor has a second rotational linear velocity V2, and the third motor has a third rotational linear velocity V3. When the mode determination module determines that the printing medium is conveyed in the first direction conveying mode, the motor control module dynamically adjusts the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2, and correspondingly controls the first motor, the second motor and the third motor to rotate in the first rotation direction and satisfy: V2≥V3≥V1; When the mode determination module determines that the printing medium is conveyed in the second direction conveying mode, the motor control module dynamically adjusts the values ​​of V1, V2 and V3 according to the detected values ​​of R1 and R2, and correspondingly controls the first motor, the second motor and the third motor to rotate in the second rotation direction and satisfy: V2≥V1≥V3.

9. A printing apparatus, the printing apparatus comprising: A printhead, a controller, and a printing media delivery mechanism, wherein the controller controls the operation of the printhead and the printing media delivery mechanism respectively, characterized in that the controller performs the control method according to any one of claims 1 to 7.

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