Motor drive control method and device, apparatus of image forming device

Abstract

The embodiment of the present application provides a motor driving control method and device of an image forming equipment, and equipment, and the method comprises the following steps: before a medium conveying component conveys a medium, a first control strategy is executed to control a motor to rotate at a target rotating speed; when the medium conveying component starts to convey the medium, a second control strategy is switched to control the motor to drive the medium conveying component to convey the medium at the target rotating speed. Through the method, the rotating speed of the motor driving the medium conveying component in the idle state or conveying the medium can be controlled to be the same through different control strategies, the stability of the conveying speed of the medium conveying component is ensured, the stability and consistency of the medium transmission speed can be improved, and the quality of the medium image generation is improved.

Description

Technical Field

[0001] This application relates to the field of image forming technology, and in particular to a motor drive control method, apparatus, and device for an image forming apparatus. Background Technology

[0002] Image forming devices perform image forming jobs, such as generating, printing, receiving and sending image data, and examples of image forming devices include printers, scanners, copiers, fax machines, and multi-function peripherals (MFPs) that perform the above functions in a single device.

[0003] Image forming equipment is equipped with motors that provide the driving force for its operation. The motors are needed to move the paper from the paper tray to the paper path, to the imaging assembly, and finally to the paper ejection assembly after transfer. During paper transport, the motor load varies, causing fluctuations in the paper transport speed. These fluctuations can affect transfer quality, such as causing transfer position misalignment. Summary of the Invention

[0004] In a first aspect, embodiments of this application provide a motor drive control method for an image forming apparatus. The image forming apparatus includes: a medium transport component and a motor providing driving force to the medium transport component. The method includes: before the medium transport component transports the medium, executing a first control strategy to control the motor to rotate at a target speed; and when the medium transport component begins to transport the medium, switching to executing a second control strategy to control the motor to drive the medium transport component to transport the medium at the target speed. This method allows for different control strategies to control the motor to drive the medium transport component at the same speed whether it is unloaded or transporting the medium, ensuring the stability of the medium transport component's speed, thereby improving the stability and consistency of the medium transmission speed and enhancing the quality of the generated medium image.

[0005] In one possible implementation, the first control strategy is used to control the motor to rotate at the target speed based on a first parameter, and the second control strategy is used to control the motor to drive the medium conveying component to convey the medium at the target speed based on a second parameter, wherein the first parameter is different from the second parameter.

[0006] In one possible implementation, the image forming apparatus has a built-in speed adjustment unit for eliminating the deviation between the current rotational speed and the target rotational speed of the motor. Under the first parameter, the speed adjustment unit adjusts the rotational speed of the motor by less than the speed adjustment unit adjusts the rotational speed of the motor under the second parameter.

[0007] In one possible implementation, the medium conveying component includes at least two medium conveying components, and the motor includes a first motor that provides driving force to the at least two medium conveying components. The execution of the second control strategy to control the motor to drive the medium conveying components to convey the medium at the target rotational speed includes: controlling the motor to drive the medium conveying components to convey the medium at the target rotational speed based on the consecutive multiple different second parameters, wherein when each of the at least two medium conveying components begins to convey the medium, the motor is controlled to rotate at the target rotational speed based on different second parameters corresponding to different medium conveying components.

[0008] In one possible implementation, the method further includes: determining that after the medium conveying component starts conveying the medium and a preset time has elapsed, switching to execute a first control strategy to control the motor to drive the medium conveying component to convey the medium.

[0009] In one possible implementation, the duration of the preset time varies depending on the type of the medium conveying component or the size of the medium.

[0010] In one possible implementation, the method further includes: after determining that the medium enters a second preset region located downstream of the first preset region, switching to execute a first control strategy to control the motor to drive the medium conveying component to convey the medium.

[0011] In one possible implementation, the media conveying component includes two adjacent first media conveying components and second media conveying components, and the motor includes a first motor that provides driving force to the first media conveying component and a second motor that provides driving force to the second media conveying component; the method specifically includes: when it is determined that the first media conveying component starts conveying media, controlling the first motor to drive the first media conveying component to convey the media at a first conveying speed based on a second parameter; and when it is determined that the second media conveying component starts conveying media, controlling the second motor to drive the second media conveying component to convey the media at the first conveying speed based on a third parameter.

[0012] In one possible implementation, determining that the media transport component has started transporting the media includes: determining that the media transport component has started transporting the media based on a media transport command issued by the image forming apparatus.

[0013] In one possible implementation, the image forming apparatus further includes a clutch component for transmitting or discontinuing the driving force provided by the motor to the media delivery component, wherein determining that the media delivery component begins to deliver the media based on a media delivery command includes determining that the media delivery component begins to drive the media based on a clutch closure signal.

[0014] In one possible implementation, determining that the medium conveying component has started conveying the medium includes: when the medium conveying component is in a rotating state, determining that the medium has entered a first preset area corresponding to the medium conveying component.

[0015] In one possible implementation, the media conveying component being in a rotating state includes: the motor driving the media conveying component to rotate at a first conveying speed, wherein when switching to execute the second control strategy to control the motor, the motor drives the media conveying component to convey the medium at the first conveying speed at a target rotational speed.

[0016] In one possible implementation, determining that the medium has entered the first preset area corresponding to the medium transport component includes: starting from the time the medium transmission command is sent, timing a first predetermined time, and determining that the medium has entered the first preset area, wherein the duration of the first predetermined time is different depending on the type of the medium transport component or the size of the medium; or, based on the detection information of the detection component of the image forming apparatus, if it is determined that the current transport position of the medium has reached a first reference position, then determining that the medium has entered the first preset area, wherein the detection component is used to detect the transport position of the medium, and the first reference position is the position when the medium arrives at the medium transport component, or the position reached after timing a third predetermined time when the medium has traveled a first predetermined distance before arriving at the medium transport component.

[0017] In one possible implementation, the media conveying components include at least one of the following: a feed roller, a transfer roller, a correction roller, a transfer roller, a fixing roller, and an exhaust roller.

[0018] Secondly, embodiments of this application provide a motor drive control device for an image forming apparatus. The image forming apparatus includes: a medium transport component and a motor that provides driving force to the medium transport component. The device includes: a control module, configured to execute a first control strategy to control the motor to rotate at a target speed before the medium transport component transports the medium; and to switch to executing a second control strategy to control the motor to drive the medium transport component to transport the medium at the target speed when the medium transport component starts transporting the medium.

[0019] Thirdly, embodiments of this application provide a motor drive control device for an image forming apparatus, comprising: a processor and a memory, wherein the memory stores at least one instruction, which, when loaded and executed by the processor, implements the motor drive control method for the image forming apparatus provided in the first aspect. In some possible implementations, the motor drive controller of the image forming apparatus may be a chip or a chip module.

[0020] Fourthly, embodiments of this application provide an image forming apparatus, including: a medium transport component, a motor providing driving force for the medium transport component, and a motor drive control device for the image forming apparatus provided in the third aspect.

[0021] Fifthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the motor drive control method for the image forming apparatus provided in the first aspect.

[0022] In a sixth aspect, embodiments of this application also provide a computer program product, including a computer program or instructions, which, when executed by a processor, implement the motor drive control method for the image forming apparatus provided in the first aspect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of an image forming apparatus structure provided in one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in one embodiment of this application;

[0026] Figure 3A flowchart illustrating a motor drive control method for an image forming apparatus provided in one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of a medium conveying component according to an embodiment of this application conveying a medium;

[0028] Figure 5 A schematic diagram of a medium conveying component conveying a medium according to another embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in another embodiment of this application;

[0030] Figure 7 This is a schematic diagram illustrating the determination of a medium entering a first preset region according to an embodiment of this application;

[0031] Figure 8 A schematic diagram of a first preset time classification provided in one embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in another embodiment of this application;

[0033] Figure 10 This is a schematic diagram illustrating the control strategy switching provided in one embodiment of this application;

[0034] Figure 11 This is a schematic diagram illustrating the control strategy switching provided in another embodiment of this application;

[0035] Figure 12 This is a schematic diagram of a media transport scenario provided in one embodiment of this application;

[0036] Figure 13 This is a schematic diagram of control strategy switching provided in one embodiment of the present application;

[0037] Figure 14 This is a schematic diagram of the motor drive control device structure of an image forming apparatus provided in one embodiment of the present application;

[0038] Figure 15 This is a schematic diagram of the motor drive controller structure of an image forming apparatus provided in one embodiment of the present application;

[0039] Figure 16 This is a schematic diagram of the structure of an image forming apparatus provided in one embodiment of the present application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, the "multiple" mentioned in this specific embodiment refers to two or more.

[0041] Figure 1 This is a schematic diagram of an image forming apparatus structure provided in one embodiment of this application.

[0042] Please see Figure 1 The image forming apparatus 100 is used to perform image forming jobs, such as generating, printing, receiving and sending image data, and examples of the image forming apparatus 100 include printers, scanners, copiers, fax machines, and multi-functional peripherals (MFPs) that perform the above functions in a single device.

[0043] As an example of an image forming apparatus 100, the image forming apparatus 100 includes a processing cartridge, a transfer belt 105, a secondary transfer roller 106, a paper feed tray 107, a manual paper feed tray 108, a paper feed roller 109, a transfer roller 110, a paper detection sensor 120, a laser scanning unit (LSU) 111, a fixing roller (including a heating roller 112 and a pressure roller 113), an ejection roller 114, and an ejection tray 115, etc. Generally, the processing cartridge is a consumable of the image forming apparatus 100. Figure 1 The image forming apparatus 100 is capable of printing multiple colors, including four color processing cartridges: processing cartridge K (black), processing cartridge C (cyan), processing cartridge M (magenta), and processing cartridge Y (yellow). Each processing cartridge K, C, M, and Y includes a photosensitive drum 101 (K, C, M, Y), a charging roller 102 (K, C, M, Y), a developing roller 103 (K, C, M, Y), and a toner cartridge 104 (K, C, M, Y) for holding the corresponding color toner. Furthermore, the image forming apparatus 100 can also be a monochrome printer containing only processing cartridge K (black).

[0044] LSU 111 is a single LSU comprising four optical paths. Four charging rollers 102 (K, C, M, Y) charge the surfaces of the four photosensitive drums 101 (K, C, M, Y) respectively. The four optical paths of LSU 111 emit laser beams to form electrostatic latent images on the surfaces of the photosensitive drums 101 (K, C, M, Y). Four developing rollers 103 (K, C, M, Y) develop toner images of a single color on the surfaces of the photosensitive drums 101 (K, C, M, Y). The image forming apparatus 100 employs a two-stage transfer method, whereby the four photosensitive drums 101 (K, C, M, Y) sequentially transfer the toner images onto the transfer belt 105. The colored toner images formed on the transfer belt 105 are then transferred a second time onto the paper via a secondary transfer roller 106. A paper tray 107 stores the paper, and a paper feed roller 109 transports the stored paper to the transport path (i.e., the paper path channel described later). The conveyor roller 110 is used to convey the paper to the secondary transfer roller 106.

[0045] The secondary transfer roller 106 transports the imaged paper to the clamping area of ​​the hot roller 112 and the pressure roller 113. The hot roller 112 and the pressure roller 113 are used to fix the toner image on the paper. The hot roller 112 can be heated by ceramic heating. The hot roller 112 and the pressure roller 113 transport the fixed paper to the discharge roller 114. The discharge roller 114 discharges the paper into the discharge tray 115 and stacks it up.

[0046] The laser scanning unit uses four light sources, such as LEDs, to emit beams that pass through a multifaceted mirror and an optical system before being projected onto each photosensitive drum to achieve the image formation process. The paper detection sensor 120 is used to detect whether there is paper in the paper path at its location.

[0047] The paper feed cassette 107 is provided with a paper outlet. The paper feed roller 109 is specifically used to feed the paper contained in the paper feed cassette 107 from the paper outlet into the paper path for transfer requirements. The image forming apparatus 100 also includes a drive mechanism (not shown) for driving the paper feed roller 109. The drive mechanism is a drive motor used to drive the paper feed roller 109 to move, thereby realizing the paper feeding operation. The drive mechanism 181 is electrically connected to the controller (not shown) of the image forming apparatus to realize the controller's operation control of the drive mechanism. The controller is electrically connected to the paper detection sensor 120, which sends the detection result information of whether there is paper in the paper path to the controller.

[0048] The image forming apparatus 100 also includes an operation panel (not shown), which includes an operation section consisting of various keys (not shown) and a touchpad-type display section (not shown).

[0049] It is understood that the image forming apparatus 100 listed above is only an example, and the component configuration and component arrangement of the image forming apparatus 100 can be adjusted according to the actual situation without affecting the improvement idea of ​​the present invention.

[0050] Figure 2 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in one embodiment of this application.

[0051] Reference Figure 2 As shown, the image forming apparatus may include a controller 201, a motor 202, and a media conveying component 203. The controller 201 is communicatively connected to the motor 202, and the controller 201 controls the motor 202 to drive the media conveying component 203 based on different control strategies. The media conveying component 203 may include at least one of the following: a paper feed roller, a transfer roller, a correction roller, a transfer roller (also called a secondary transfer roller), a fixing roller, and an ejector roller. The media conveyed by the media conveying component 203 can be paper, fabric, film, or other printable media. The controller 201 may be a main controller mounted on the apparatus body, an independent controller controlling the motor, a member of an overall control system mounted on the apparatus body, or other control implementation components. The controller 201 may also include an MCU (Microcontroller Unit) and other circuit units connected to the MCU; this application does not limit the scope of the invention.

[0052] In some embodiments, the controller 201 can acquire at least two different control strategies. One control strategy can be executed to control the motor 202 to rotate before the media conveying component 203 starts conveying the media, and another different control strategy can be executed to control the motor 202 to drive the media conveying component 203 when the media conveying component 203 starts conveying the media. This makes the rotational speed of the motor 202 the same in the state of not conveying the media and in the state of conveying the media, thereby ensuring the stability and consistency of the conveying speed of the media by the media conveying component and improving the quality of media image generation.

[0053] In some embodiments, the controller 201 may acquire at least two different control strategies in a manner that includes at least one of the following: acquiring at least two pre-stored different control strategies locally from the image forming device; acquiring at least two pre-stored different control strategies from a memory external to the image forming device; or acquiring at least two different control strategies from a cloud connected to the image forming device.

[0054] During the media transmission process, since the motor takes a long time to reach the target speed from startup, if it starts rotating and transporting the media from startup, there will be a long acceleration process before the motor reaches the target speed. Furthermore, when the motor reaches the target speed, there will be a large range of speed fluctuations. This results in a long adjustment time for the transport speed of the media transport component, which seriously affects the transport efficiency and hinders the imaging control process.

[0055] Therefore, in order to achieve the conveying of the medium at a stable speed, the motor will be started in advance and rotated to a stable state at the target speed. When the medium needs to be conveyed by the medium conveying component, the motor can quickly drive the medium conveying component to convey the medium at the target conveying speed.

[0056] However, during motor control, especially at the moment when the medium begins to be transported by the medium transport component, the load on the medium transport component increases, which in turn increases the load on the motor. This causes the motor speed to drop momentarily and requires a relatively long fluctuation period before it can be readjusted back to the target speed, affecting the internal control process of the image forming equipment for medium transmission and image forming.

[0057] Therefore, this application proposes the following motor drive control method for use in image forming equipment.

[0058] Figure 3 This is a flowchart of a motor drive control method for an image forming apparatus according to an embodiment of this application. The motor drive control method is applied to the image forming apparatus. Specifically, the motor drive control method is executed by a control unit provided inside the image forming apparatus, and the control unit includes the aforementioned controller 201.

[0059] Combination Figure 2 and Figure 3 As shown, the method may include the following steps:

[0060] S101: Before the medium conveying component conveys the medium, the first control strategy is executed to control the motor to rotate at the target speed.

[0061] S102: When the medium conveying component starts conveying the medium, the second control strategy is switched to control the motor to drive the medium conveying component to convey the medium at the target speed.

[0062] Regarding S101

[0063] To ensure the timing synchronization between the image forming process and the media transport process within the image forming equipment, a first control strategy is implemented to keep the motor stable at the target speed under no-load conditions. Under this first control strategy, the motor can maintain the target speed under no-load conditions, ensuring a stable speed and allowing it to remain in standby mode.

[0064] It should be noted that the no-load state refers to the rotation state when the motor is not driving the medium conveying component to convey the medium. The load is relatively small compared to when conveying the medium. This rotation state may include, but is not limited to, one of the following two situations: the medium conveying component is disengaged from the motor, or the motor drives the medium conveying component to be in a rotation state without conveying the medium.

[0065] Regarding S102

[0066] When the medium conveying component starts conveying the medium, that is, when the medium begins to be conveyed by the medium conveying component, this can be when the medium conveying component switches from a stopped state to a rotating state to convey the medium along a predetermined conveying direction, or when the medium conveying component is in a rotating state and the medium is conveyed to a preset area of ​​the medium conveying component and transported by the medium conveying component, or other situations in which the medium begins to be conveyed by the medium conveying component, which are also within the scope of this application.

[0067] In one embodiment, determining the start of medium transport by the medium transport component includes: determining that the motor-driven medium transport component starts transporting the medium based on a medium transport command issued by the image forming apparatus. To coordinate with the image forming process, the image forming apparatus may issue a medium transport command to the drive control unit via a main controller or other controller used to control the timing of medium transport. The drive control unit then controls the motor to start driving the medium transport component based on the command, thereby enabling the medium transport component to transport the medium.

[0068] The image forming apparatus may also include a clutch component, which is a power transmission component of the transmission control unit, used to transmit or cut off the driving force provided by the motor to the medium conveying component. The specific steps to make the motor drive the medium conveying component to start conveying the medium may include: sending a clutch closing signal to the clutch component to close the clutch component, so that the motor drives the medium conveying component.

[0069] The clutch closure signal can be included in the media transmission command. That is, the controller controlling the transmission timing sends the clutch closure signal included in the issued media transmission command directly to the clutch component of the transmission control unit, causing the clutch to close. Alternatively, the transmission control unit may have an independent control component. In this case, the media transmission command does not include a clutch closure signal. When the control component of the transmission control unit receives the media transmission command, it sends a clutch closure signal to the clutch component, which then closes according to this signal, allowing the motor's driving force to be transmitted to the media conveying component.

[0070] That is, when the image forming device issues a media transfer command and directly controls the motor to drive the media conveying component to convey the media, the controller 201 can directly determine the start of the motor driving the media conveying component based on the media transfer command. In this case, the time point at which the controller 201 determines the start of the motor driving the media conveying component to convey the media can be the moment when the controller 201 issues the media transfer command, or a short period of time after the controller 201 issues the media transfer command. This application embodiment does not limit this.

[0071] After the image forming device issues a media transmission command and a clutch closure signal, it can control the motor to drive the media conveying component to convey the media. Then, the controller 201 finally determines the time point at which the motor starts driving the media conveying component based on the clutch closure signal. Specifically, the time point at which the controller 201 determines the time point at which the motor starts driving the media conveying component to convey the media can be the moment when the controller 201 completes the issuance of the clutch closure signal, or a short period of time after the controller 201 issues the clutch closure signal. This application embodiment does not limit this.

[0072] Figure 4 This is a schematic diagram of a medium conveying component provided in one embodiment of this application, showing the conveying of a medium.

[0073] Reference Figure 4 As shown, in some embodiments of the medium conveying scenario, according to the medium conveying direction, the medium 30 stays on the medium conveying component 203 or is located at the front side of the medium conveying component 203, i.e., position P1. At this time, the clutch component between the medium conveying component 203 and the motor is opened, the medium conveying component 203 is in a disengaged state from the motor, and the motor idles at the target speed.

[0074] Specifically, the media conveying component 203 can be the correction roller in the image forming equipment, and the clutch component is a clutch. When the media arrives at the correction roller and is corrected by the correction roller, the correction roller is in a stopped rotating state, while the motor used to drive the correction roller is in an unloaded state at the target speed. After the correction roller has finished correcting, the controller on the image forming equipment issues a media transmission command to close the clutch. At this time, the motor drives the correction roller to rotate, so that the media 30 is transported forward.

[0075] It should be noted that the calibration of the calibration roller can be achieved through timing or image forming process control. In the timing method, when the medium 30 is delivered to the calibration roller, a predetermined time is recorded, or a predetermined time is recorded based on the paper feed signal. After this time, it is determined that the medium 30 has been calibrated, and a medium transfer command is issued to coordinate with the image forming process. In this case, the medium 30 is transferred from the paper feed tray or manual feed tray to the calibration roller based on the paper feed signal. In the image forming process control method, after calibration, the medium 30 remains at the calibration roller. When the image forming process begins or when the timing is determined to be the media delivery time, a medium transfer command is issued to drive the motor to drive the calibration roller. The media delivery time can be a predetermined time elapsed after the image forming process starts or a predetermined time elapsed before the start of the process, etc., and is not specifically limited. Of course, the media delivery component 203 can also be other delivery components besides the calibration roller, all of which are within the scope of this application.

[0076] In another embodiment, the controller determines that the medium conveying component has started conveying the medium by: when the medium conveying component is rotating, determining that the medium has entered a first preset area corresponding to the medium conveying component. Since the medium conveying component is in a rotating state driven by the motor, when the medium comes into contact with the medium conveying component, that is, when it enters the first preset area of ​​the medium conveying component, the medium conveying component drives the medium through the frictional force of the contact, thus determining that the medium conveying component has started conveying the medium. The implementation method of this embodiment will be described in detail below.

[0077] Figure 5 This is a schematic diagram of a medium conveying component for conveying a medium, provided in another embodiment of this application.

[0078] Reference Figure 5 As shown, in some embodiments of the medium 30 conveying scenario, when the medium 30 enters the first preset area of ​​the medium conveying component 203 according to the medium conveying direction, the front end of the medium 30 just touches the medium conveying component 203, that is, when the front end of the medium 30 reaches... Figure 4 At position P1, as shown, the medium conveying component 203 begins to convey the medium 30. When the rear end of the medium 30 just detaches from the medium conveying component 203, that is, when the rear end of the medium 30 reaches... Figure 4 When the point P2 is at the indicated position (the points P1 and P2 can coincide), the medium conveying component 203 completes the conveying of the medium 30.

[0079] In some embodiments, the first preset region can be the area traversed by the medium when the medium conveying component conveys the medium. Using the leading edge of the medium 30 as a delineation reference, the area traversed by the leading edge of the medium from the moment it contacts the medium conveying component to the moment its rear end leaves the medium conveying component is the first preset region. Figure 4The shown area is A1. In other embodiments, the first preset area is not limited to... Figure 4 The area A1 shown can also be defined as the first preset area by extending / contracting a predetermined distance in both the forward and backward directions based on the medium conveying direction.

[0080] In some embodiments, the controller may determine the start of medium delivery by timing or by detecting the medium delivery position in combination with timing. The following describes each of the above determination methods in detail.

[0081] Determined by time

[0082] Figure 6 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in another embodiment of this application.

[0083] Reference Figure 6 As shown, compared to Figure 2 The illustrated embodiment provides a motor drive control architecture for an image forming apparatus. Figure 6 The illustrated embodiment also includes a timing unit 204. This timing unit 204 can perform timing based on control commands from the controller 201.

[0084] In some embodiments, starting from the time the media transfer command is sent, for example, when the controller 201 for controlling media delivery sends the media transfer command to the paper feed cassette to feed the media 30 into the paper path, a first predetermined time is counted, and after the first predetermined time, it is determined that the media 30 has entered the first preset area. The paper feed clutch on the paper feed cassette receives the media transfer command and closes, so that the paper feed motor drives the paper feed roller to feed the media 30 into the paper path. Alternatively, when the media 30 is waiting at a fixed position such as the correction roller, the media 30 will pass through the media delivery component 203 during the forward transmission process caused by the conveying component at the fixed position after the controller issues the media transfer command. A preset time is counted, and after the preset time, it is determined that the media has entered the first preset area. The media transmission command can be a paper feeding signal that causes the paper feeder or manual paper feed tray to feed paper, or a media transmission signal issued based on the image forming process, or a media transmission command or clutch closing signal mentioned in the above embodiments, or an internal transmission signal within the controller 201 based on the image forming process and media transport timing control. All signals used to drive media transport and that pass through the media transmission component are within the scope of this application.

[0085] Figure 7 This is a schematic diagram illustrating the determination of a medium entering a first preset region according to an embodiment of this application.

[0086] Combined with reference Figure 6 and Figure 7As shown, the controller 201 receives the medium transmission signal at time t0. At time t0, the controller 201 can send a timing command to the timing unit 204, controlling the timing unit 204 to time a first predetermined time t. Once the controller 201 determines that the timing unit 204 has completed timing, it can determine that the medium 30 has entered the first preset area. For example, the first preset area is... Figure 5 In area A1 shown, controller 201 determines that timing unit 204 has completed timing. That is, after a first predetermined time t from time t0, it can be determined that the front end of medium 30 has just contacted medium conveying component 203, i.e., the front end of medium has just arrived. Figure 4 The location of point P1 is shown. In this embodiment, before the medium 30 enters the first preset area, the motor 202 drives the medium conveying component 203 to rotate, so that the medium 30 is conveyed by the medium conveying component 203 when it enters the first preset area.

[0087] In some embodiments, the duration of the first predetermined time varies depending on the type of the media conveying component 203.

[0088] Figure 8 This is a schematic diagram of a first preset time classification provided for one embodiment of this application.

[0089] Reference Figure 8 As shown, for example, the media conveying components 203 include a conveying roller, a transfer roller, a fixing roller, and a discharge roller. The first predetermined times t corresponding to the above different types of media conveying components 203 are time t1, time t2, time t3, and time t4, respectively. Wherein, relative to the same media transmission signal, the first predetermined time t corresponding to the different types of media conveying components 203 can be the time from when the media transmission signal is received from the controller in advance, during which the media is transmitted to the P1 point position of each type of media conveying component 203, that is, the time when the same media arrives at the conveying roller, transfer roller, fixing roller, and discharge roller respectively.

[0090] In some embodiments, the duration of the first predetermined time varies depending on the media size. The image forming apparatus is configured with multiple paper trays, and the paper trays hold different sizes of paper. For example, they may include a paper tray for A4 paper, a paper tray for A5 paper, or a paper tray capable of accommodating multiple paper sizes simultaneously. Because the positions of the paper trays for different paper sizes are different, or the positions of the different paper sizes on the paper trays are different, the starting points for conveying the different paper sizes are different. Therefore, the time required for different paper sizes to enter the first preset area is different. In this case, the actual duration of the first predetermined time can be set based on the size of the media currently selected by the user.

[0091] Determined by detecting the position of the transported medium.

[0092] Figure 9 This is a schematic diagram of the motor drive control architecture of an image forming apparatus provided in another embodiment of this application.

[0093] Reference Figure 9 As shown, compared to Figure 2 The illustrated embodiment provides a motor drive control architecture for an image forming apparatus. Figure 9 The illustrated embodiment also includes a detection component 205 for detecting the delivery position of the medium. In some embodiments, the detection component 205 may be... Figure 1 The paper detection sensor 120 shown is shown.

[0094] In some embodiments, the controller 201 can determine whether the medium has entered a first preset region based on the detection information from the detection component 205. Based on the detection information from the detection component 205 of the image forming apparatus, if it is determined that the current transport position of the medium has reached a first reference position, then it is determined that the medium has entered the first preset region. The detection component is used to detect the transport position of the medium, and the first reference position is the position where the medium reaches the medium transport component. For example, the first preset region of the medium transport component 203 is... Figure 4 In the first preset area A1 shown, the controller 201 determines that the medium enters the first preset area A1 of the medium conveying component 203 if it determines that the front end of the medium has reached the P1 point position (first reference position) based on the detection information of the detection component 205.

[0095] In addition, the detection information of the detection component 205 may also include determining whether the medium has entered a second preset region located downstream of the medium conveying component 203. When the detection component 205 detects the medium conveying component at the beginning end (third reference position) of the second preset region, it can determine that the medium is in a stable medium conveying state of the medium conveying component based on the type of the medium conveying component or the size of the medium, thereby making an appropriate control strategy. Of course, in this embodiment, if the detection component 205 detects that the rear end of the medium leaves the first reference position at the first reference position, it determines that the medium has left the first preset region and entered the second preset region, which can also indicate that the medium is in a stable medium conveying state of the medium conveying component.

[0096] The stable state of medium conveying component refers to the state in which the unstable motor speed caused by the initial conveying of medium by the medium conveying component is transformed into a stable state of motor speed at the target speed under the adjustment of the second control strategy, so that the medium conveying component conveys the medium at a stable target conveying speed during the conveying process.

[0097] In other embodiments, the first reference position may also be the position reached after a third predetermined time has elapsed since the medium has traveled a preset distance before reaching the medium conveying component. When the controller 201 determines, based on the detection information from the detection component 205, that the medium has traveled a preset distance before reaching the medium conveying component, it may send a timing command to the timing unit 204 to control the timing unit 204 to time for a third predetermined time. When the controller 201 determines that the timing unit 204 has completed the timing (for the third predetermined time), it can determine that the medium has entered the first preset area.

[0098] The above is a detailed description of the different ways to determine the entry of the medium into the first preset area.

[0099] In some embodiments, executing a first control strategy to control the motor to rotate at a target speed before the media conveying component conveys the media includes:

[0100] Before the medium enters the first preset area, the first control strategy is executed to control the motor to drive the medium conveying component to rotate. At this time, the motor is in an unloaded state rotating at the target speed.

[0101] The process of determining before the medium enters the first preset area may include: after receiving the medium transmission signal and before determining before the medium enters the first preset area, during this time period, the motor drives the medium conveying component to rotate by executing the first control strategy.

[0102] In some embodiments, a first control strategy is used to control the motor to rotate at a target speed based on a first parameter, and a second control strategy is used to control the motor to rotate at the target speed based on a second parameter, wherein the first parameter is different from the second parameter. Since the output capacity of the motor at the same speed differs under no-load and load conditions, when the medium begins to be transported by the medium conveying component, the motor speed will fluctuate due to load changes. Therefore, when the medium conveying component begins to transport the medium, the control strategy is adjusted, and the parameters of the control strategy are changed to cope with the speed fluctuations caused by load disturbances, so that the motor speed can quickly stabilize at the target speed, and the medium conveying component can quickly stabilize and transport the medium at a first conveying speed. The first conveying speed is the conveying speed at which the controller controls the medium conveying component to transport the medium.

[0103] It should be noted that when the motor is in an unloaded state at the target speed, the driving speed of the driving medium conveying component can be the first conveying speed when conveying the medium. However, in some application scenarios, such as when the speed of the medium conveying component is different in the unloaded state and the full-loaded state, the driving speed of the motor driving the medium conveying component in the unloaded state can be a second conveying speed different from the first conveying speed. All of these are within the scope of this application.

[0104] When it is determined that the medium conveying component has started conveying the medium, the execution of the first control strategy can be switched to the execution of the second control strategy to control the motor to drive the medium conveying component to convey the medium at the target speed and at the first conveying speed, thereby improving the stability of the motor speed when it changes from the no-load state to the medium conveying state.

[0105] In some embodiments, the image forming apparatus includes a built-in speed adjustment unit. This unit eliminates the deviation between the current rotational speed and the target rotational speed of the motor. Under a first parameter, the adjustment force of the speed adjustment unit on the motor's rotational speed is less than that under a second parameter. The adjustment force of the speed adjustment unit on the motor's rotational speed refers to at least one of the adjustment magnitude or the number of adjustments made by the speed adjustment unit to the motor's current rotational speed. Specifically, the adjustment magnitude refers to the difference between the current rotational speed and the target rotational speed, which can be achieved by changing the motor's current or voltage to increase or decrease the motor's rotational speed to reach the target speed. The number of adjustments is the sum of the cumulative number of times the motor's rotational speed is adjusted during the process of adjusting the current rotational speed to the target speed. Taking the medium conveying component of this invention as an example, when the medium conveying component is in an unloaded state, the interference received by the motor is small. Under the first parameter, the speed adjustment unit adjusts the current speed of the motor by a small range. Within a small fluctuation range, it can quickly maintain the speed of the motor at the target speed, thereby ensuring that the transport speed of the medium conveying component remains at the first conveying speed. When the medium conveying component changes from an unloaded state to a loaded state of transporting medium, the motor speed will decrease instantaneously due to the load change. The speed adjustment unit under the original first parameter control has a weak ability to restore the speed to the original speed, a long recovery time, and a small adjustment range for the speed per unit time. However, after the input parameter of the speed adjustment unit is switched to the second parameter, the speed adjustment capability can be improved, that is, the speed adjustment range per unit time can be increased, so that the motor speed can be quickly restored to the original speed. Therefore, even when the load changes, the transmission speed of the medium conveying component can be stably maintained at the first conveying speed and the medium can be transmitted at this conveying speed. In another embodiment, when the speed adjustment unit primarily regulates the motor speed by adjusting the number of adjustments, if the motor speed momentarily decreases due to load changes, the speed adjustment unit under the original first parameter control has a weak ability to restore the speed to its original speed, resulting in a long recovery time and numerous adjustments required to restore the speed to the target speed. However, by switching the input parameter of the speed adjustment unit to the second parameter, the speed adjustment capability can be improved, i.e., the number of speed adjustments required to restore the motor speed to the target speed can be reduced, allowing the motor speed to quickly recover to its original speed. In other embodiments, the motor speed can also be adjusted by combining the adjustment range and the number of adjustments; this application does not limit this approach.

[0106] In specific implementation, the speed adjustment unit is the control unit that implements the speed adjustment strategy. The first control strategy includes a speed adjustment strategy that controls the motor output under the first parameter, and the second control strategy includes a speed adjustment strategy that controls the motor output under the second parameter. When the medium transmission component starts to transport the medium, the speed adjustment strategy's ability to stabilize the motor at the target speed under the second parameter is greater than the speed adjustment strategy's ability to stabilize the motor at the target speed under the first parameter. This ability has been described in the aforementioned adjustment force of the speed adjustment unit and will not be repeated here. Thus, the motor can be quickly adjusted to ensure that the medium transmission component maintains the first transmission speed to transport the medium. That is, before the medium is transported by the medium transmission component, after the medium transmission component starts to transport the medium, the speed adjustment unit's adjustment force on the motor speed is enhanced, thereby ensuring that the motor speed can be stabilized at the target speed during the medium transmission process.

[0107] In some embodiments, both the first and second parameters are proportional-integral-derivative (PID) control parameters, and the speed adjustment strategy is PID control. That is, the controller can perform PID control on the motor based on either the first or second parameter to drive the media conveying component to convey the media at a corresponding conveying speed. PID control is achieved by three input parameters: a proportional parameter P, an integral parameter I, and a derivative parameter D. Both the first and second parameters are sets of input parameters containing these three parameters. The difference between the second and first parameters lies in at least one of the three parameters being different from the first parameter, thus resulting in a different control strategy output by the speed adjustment strategy.

[0108] The following describes in detail the various technical solutions provided in this application through several embodiments.

[0109] Example 1

[0110] Figure 10 This is a schematic diagram illustrating the control strategy switching provided in one embodiment of this application.

[0111] Reference Figure 10 As shown, before determining that the medium is being transported by the medium transport component, for example, after receiving the medium transmission signal and before the medium transport component starts transporting the medium, the controller executes a first control strategy. Specifically, the controller may control the motor to rotate at a target speed based on the first parameters included in the first control strategy, thus entering an unloaded state.

[0112] Because the medium being transported by the medium transport component increases the load on the motor, it may reduce the driving force provided to the medium transport component, thereby reducing the transport speed of the medium transport component and affecting the stability of the transport speed, and even affecting the image formation effect. Therefore, in one embodiment, when the medium is in the first preset area transported by the medium transport component and the motor starts to drive the medium transport component to rotate at the target speed, the controller switches from executing a first control strategy to executing a second control strategy. Specifically, after switching to executing the second control strategy, the controller can change from controlling the motor based on the first parameter to controlling the motor based on the second parameter included in the second control strategy, thereby enhancing the adjustment of the motor speed. This allows the medium transport component to maintain a stable transport speed after changing from an unloaded state to a medium transport state. That is, the motor maintains a stable speed before and after the control strategy switch, thereby allowing the medium transport component to transport the medium at a stable transport speed.

[0113] In another embodiment, when the medium conveying component is driven by the motor to rotate at a first conveying speed, when the controller determines that the medium is being conveyed by the medium conveying component, for example, according to the conveying direction, the medium enters the first preset area of ​​the medium conveying component, and when the medium conveying component contacts the medium and begins to convey the medium, the controller switches from executing the first control strategy to executing the second control strategy. Specifically, after switching to executing the second control strategy, the controller can change from controlling the motor based on the first parameter to controlling the motor based on the second parameter included in the second control strategy, thereby enhancing the adjustment of the motor speed. This allows the medium conveying component to maintain a stable motor speed after changing from an unloaded state to a medium conveying state, ensuring that the medium conveying component maintains the first conveying speed before and after the control strategy switch.

[0114] In some embodiments, see Figure 11 After S102, it may also include S103: after determining that the medium conveying component has started conveying the medium and a preset time has elapsed, switch to execute the first control strategy to control the motor to rotate at the target speed.

[0115] When the media conveying component begins conveying the media, a preset time is used to determine that the second control strategy has completed adjusting the motor speed. This preset time is longer than the adjustment time for the motor speed based on the second control strategy. Once the motor stabilizes at the target speed, the media conveying component can then convey the media at a stable first conveying speed, ensuring a stable conveying state. Alternatively, the preset time may also include the time it takes for the media to leave the first preset area corresponding to the media conveying component. In other words, the first control strategy is executed to control the motor to rotate at the target speed after the media leaves the media conveying component. Of course, the first control strategy can also be switched during the media conveying process; the change can be made only after the adjustment is complete.

[0116] In some embodiments, the controller may determine the load required for media transmission applied to the media transmission component by means of timing, or by detecting the media delivery position in combination with timing, or by combining timing with media transmission signals. The following describes each of the above determination methods in detail.

[0117] In some embodiments, when the medium transmission component is in a rotating state before conveying the medium, a second predetermined time can be started from the time the medium enters the first preset area, and after the second predetermined time, it can be determined that the speed of the motor has been adjusted to a stable state. The second predetermined time can be set when the medium leaves the first preset area of ​​the medium transmission component or after the medium is conveyed by the medium conveying component but is already in a stable conveying state. In this stable conveying state, the medium conveying component conveys the medium at a stable first conveying speed in this embodiment.

[0118] The controller 201 can send a timing command to the timing unit 204 when it determines that the medium has entered the first preset area, and control the timing unit 204 to time a second predetermined time. When the controller 201 determines that the timing unit 204 has completed the timing (for the second predetermined time), it can determine that the medium is in a stable conveying state or that the medium has left the first preset area corresponding to the medium conveying component.

[0119] In some embodiments, the duration of the second predetermined time varies depending on the type of media conveying component 203. For example, the types of media conveying components 203 include feed rollers, transfer rollers, conveying rollers, fixing rollers, and discharge rollers. The different types of media conveying components 203 are located in different positions, so the time required for the media to leave each type of media conveying component 203 is different.

[0120] In some embodiments, the image forming apparatus is configured with multiple paper trays, and the paper trays hold different sizes of paper. For example, they may include a paper tray for A4 paper, a paper tray for A5 paper, etc. The time required for different sizes of paper to leave the first preset area is different. In this case, the actual duration of the second predetermined time can be set based on the size of the medium currently selected by the user. When the medium size is different, the corresponding duration of the second predetermined time is different.

[0121] In some embodiments, the controller 201 may also determine that the motor speed has been adjusted based on the media delivery position provided by the detection component 205.

[0122] In one embodiment, the controller 201 determines whether the medium has reached a second reference position based on the medium delivery position provided by the detection component 205. If it is determined that the medium has been delivered to the second reference position, it is determined that the motor speed has been adjusted to a stable state. This second predetermined time can be set when or after the medium leaves the first preset area of ​​the medium delivery component, or when the medium is delivered by the medium delivery component but is already in a stable delivery state. In this stable delivery state, in this embodiment, the medium delivery component delivers the medium at a stable first delivery speed. Figure 5 In this implementation, when it is determined that the medium has reached a stable state, the focus can be on whether the rear end (tail) of the medium has detached from the medium delivery component. For example, the rear end of medium 30 reaches... Figure 5 When the P2 position is shown (the P1 position and the P2 position can coincide), it can be determined that the medium has just left the medium conveying component, that is, the medium has left the first preset area. At this time, the medium conveying component no longer conveys the medium, the motor re-enters the no-load state, and the first control strategy can be switched to control the motor.

[0123] Of course, as mentioned above, the timing for switching the first control strategy can be performed when the medium is in a stable conveying state. Therefore, the second reference position can be set at the position where the medium has not left the medium conveying component. At this second reference position, the second control strategy has completed the adjustment of the motor speed, and the medium is stably conveyed by the medium conveying component at the first conveying speed.

[0124] In other embodiments, the second reference position may also be the position reached after a fourth predetermined time has elapsed since the medium has reached a second preset distance from the medium conveying component. Specifically, the controller 201 can determine whether the medium has reached the second preset distance from the medium conveying component based on the medium conveying position provided by the detection component 205. When it is determined that the medium has reached this position, a timing command can be sent to the timing unit 204. When the timing unit 204 times out to the fourth predetermined time, the controller 201 determines that the timing unit 204 has completed the timing (of the fourth predetermined time), and thus determines that the medium conveying has reached a stable state or that the medium has left the medium conveying component.

[0125] In other embodiments, when the medium conveying component is in a stopped state while conveying the medium and the medium has arrived at a first preset area that can be transported by the medium conveying component, the motor speed can be determined to be adjusted to a stable state after calculating a third predetermined time from the time when the medium is determined to be transported by the medium conveying component based on the medium transmission signal. The third predetermined time can be set when the medium leaves the first preset area of ​​the medium conveying component or after the medium is transported by the medium conveying component but is already in a stable conveying state.

[0126] The controller can send a timing command to the timing unit when it receives a medium transmission signal, and control the timing unit to time a third predetermined time. When the controller determines that the timing unit has completed the timing (the third predetermined time), it can determine that the medium is in a stable conveying state or that the medium has left the first preset area corresponding to the medium conveying component.

[0127] Example 2

[0128] Figure 13 This is a schematic diagram of control strategy switching provided in another embodiment of this application.

[0129] Reference Figure 13 As shown, before the medium conveying component starts conveying the medium, for example, before the medium is driven into the first preset area corresponding to the medium conveying component when the motor drives the medium conveying component to rotate, or before the motor receives the medium conveying signal and drives the medium conveying component to rotate to convey the medium, the controller executes a first control strategy. Specifically, the controller can control the motor to rotate at a target speed based on the first parameter included in the first control strategy to enter an unloaded state where the medium conveying component is not being driven to convey the medium.

[0130] Because the increased load on the motor after the media conveying component begins conveying media may reduce the driving force provided by the motor to the media conveying component, thus reducing the conveying speed of the media conveying component and affecting its stability, and even impacting image formation. Therefore, when the controller determines that the media conveying component has started conveying media, for example, when the front end of the media just contacts the media conveying component according to the conveying direction, the controller switches from executing the first control strategy to executing the second control strategy. Specifically, after switching to the second control strategy, the speed adjustment unit can change from controlling the motor based on the first parameter to controlling the motor based on the second parameter included in the second control strategy, thereby strengthening the motor speed adjustment. This ensures that the media conveying component can maintain a stable conveying speed after changing from an unloaded state to a media conveying state, that is, maintaining the motor at the target speed before and after the control strategy switch.

[0131] In some embodiments, see Figure 13 The medium conveying component includes at least two medium conveying components, and the motor includes a first motor that provides driving force to the at least two medium conveying components. Then, executing the second control strategy to control the motor to drive the medium conveying components to convey the medium at a target speed includes: controlling the motor to drive the medium conveying components to convey the medium at a target speed based on a series of different second parameters. Specifically, when each of the at least two medium conveying components begins to convey the medium, the motor is controlled to drive at the target speed based on different second parameters for each different medium conveying component.

[0132] In this embodiment, multiple media conveying components are all driven by the same motor, namely the first motor. When the load on one of the media conveying components changes, the speed of the first motor will also fluctuate due to the change in the load on the media conveying component. Since the load generated on each media conveying component at the start of media conveying will change differently, the second parameter required in the second control strategy will also be different.

[0133] Taking the first and second media conveying components in the media conveying direction as an example, when the media begins to be conveyed by the first media conveying component, the increased load on the first component causes fluctuations in the speed of the first motor. Since the first motor has not previously carried any media conveying tasks, these fluctuations may be relatively large. Therefore, it is necessary to switch to the first second parameter for adjustment. Within a short adjustment period, such as 0.1 seconds, the motor speed is adjusted, and the first media conveying component steadily conveys the media at the first conveying speed until the media is conveyed to the second media conveying component for transport. Because the media is a deformable sheet, it may slightly curl during transmission between the two media conveying components. When the media enters the latter media conveying component along the conveying direction, it does not affect the rotation of the former component, but it does affect the rotation of the latter component. Therefore, when the media is conveyed on the second media conveying component, the resulting load change affects the speed of the first motor. Furthermore, due to the differences between the two media conveying components and the different load effects of the media on the first and second media conveying components, the corresponding second parameter settings are also different. Therefore, when the medium begins to be conveyed by the second medium conveying component, the speed adjustment unit under the second control strategy switches different second parameters to control the motor to rotate at the target speed, so that the second medium conveying component conveys the medium at the same first conveying speed as the first medium conveying component.

[0134] In one embodiment, before the first medium conveying component begins conveying the medium, the first medium conveying component is in a stopped state, and the second medium conveying component and subsequent medium conveying components are in an unloaded state rotating at a first conveying speed. When the first medium conveying component starts conveying the medium based on the medium transmission signal, the first second parameter is switched to control the motor to stabilize at the target speed and drive the first medium conveying component to convey the medium at the first conveying speed. When the medium is conveyed to the second medium conveying component, the second second parameter is switched to control the motor to stabilize at the target speed and drive the first and second medium conveying components to convey the medium at the first conveying speed. When the medium is conveyed to the third medium conveying component, the third second parameter is switched to control the motor to stabilize at the target speed and drive the first, second, and third medium conveying components to convey the medium at the first conveying speed, and so on. Before entering the next medium conveying component, taking the third medium conveying component as an example, regardless of whether the medium has left the first or second medium conveying component, it is only necessary to adjust the second parameter according to the influence on the motor speed caused by the medium starting to be conveyed by the third medium conveying component. Stabilizing the motor speed at the target speed can ensure the stability of the conveying speed of the medium between the first, second, and third medium conveying components, and even between more medium conveying components.

[0135] Example 3

[0136] Figure 12 This is a schematic diagram of a media transport scenario provided in one embodiment of this application.

[0137] Reference Figure 12 As shown, this scenario may include two adjacent first medium conveying components 203a and second medium conveying components 203b. The scenario may also include a first motor providing driving force to the first medium conveying component 203a and a second motor providing driving force to the second medium conveying component 203b. The first preset area corresponding to each medium conveying component includes the first preset area corresponding to the first medium conveying component 203a and the first preset area corresponding to the second medium conveying component 203b. For the same medium 30, before leaving the first preset area corresponding to the first medium conveying component 203a, the leading edge of the medium 30 may enter the first preset area corresponding to the second conveying component 203b; that is, there may be a scenario where two adjacent medium conveying components simultaneously convey the same medium. Since the medium 30 passes sequentially through the first medium conveying component 203a and the second medium conveying component 203b during the conveying process, the conveying speed of the medium 30 may fluctuate, affecting the stability of the medium conveying.

[0138] To overcome the above problems, in one embodiment, when it is determined that the first medium conveying component starts conveying the medium, the second control strategy is switched to control the first motor to drive the first medium conveying component 203a to convey the medium at a first conveying speed; when it is determined that the second medium conveying component starts conveying the medium, the first motor is controlled to drive the first medium conveying component 203a to convey the medium at the first conveying speed based on a third parameter. The third parameter differs from the first parameter. Under the first parameter, the speed adjustment unit's adjustment force on the motor's rotational speed is less than under the third parameter, allowing for rapid adjustment of the speed adjustment unit's adjustment force on the motor's rotational speed when the medium enters the second medium conveying component 203b. Furthermore, the third parameter can also be a different parameter than the second parameter. Since the fluctuation effect on the first motor's rotational speed caused by the medium entering the second medium conveying component 203b is different from the effect caused by the medium entering the first medium conveying component 203a, different parameters are set to adapt to different rotational speed fluctuations. Of course, in special cases where the first medium conveying component 203a and the second medium conveying component 203b have corresponding effects on the speed of the first motor, the third parameter can be set to the same value as the second parameter.

[0139] When the speed adjustment unit uses a PID control strategy to adjust and control the motor, the first parameter and the third parameter are both sets of parameter inputs containing the three parameters. The difference between the third parameter and the first parameter means that at least one of the three parameters of the third parameter is different from the first parameter, which causes the control strategy output by the speed adjustment strategy to be different. The same applies when the third parameter is different from the second parameter.

[0140] Since both media conveying components are driven by independent motors, and in actual applications, the slight curling characteristics of the media during transport between the two components prevent load fluctuations from affecting each other. That is, when the media begins to be conveyed by the second media conveying component 203b before leaving the first media conveying component 203a, the first motor corresponding to the first media conveying component 203a is already in a stable state at the target speed, and the speed fluctuations of the second media conveying component 203b caused by the conveying of the media do not affect the first media conveying component 203a. Therefore, the first media conveying component 203a maintains its current control strategy when the media enters the first preset area of ​​the second media conveying component 203b.

[0141] Figure 13 For the purpose of this application in conjunction with Figure 12 A corresponding embodiment provides a schematic diagram of control strategy switching.

[0142] Combined with reference Figure 12 and Figure 13As shown, the first medium conveying component 203a and the second medium conveying component 203b are controlled by independent first and second motors, respectively. Before determining the medium to be conveyed by the first medium conveying component 203a, the controller executes a first control strategy. Specifically, the controller can adjust the speed adjustment unit to output the first motor at a target speed based on the first parameters included in the first control strategy corresponding to the first motor, thereby driving the first medium conveying component 203a to enter an unloaded state at a first conveying speed. Similarly, before determining the medium to be conveyed by the second medium conveying component 203b, the controller adjusts the speed adjustment unit to output the second motor at a target speed based on the first parameters included in the first control strategy corresponding to the second motor, thereby driving the second medium conveying component 203b to enter an unloaded state at a first conveying speed. It should be noted that since the control strategies of the first medium conveying component 203a and the second medium conveying component 203b are independent of each other, the first parameters used to control the first motor and the first parameters used to control the second motor are selected according to the actual application situation. The two first parameters are independent of each other and are not related.

[0143] In this embodiment, both the first medium conveying component 203a and the second medium conveying component 203b are in an idling state before conveying the medium. When it is determined that the medium has entered the first preset area corresponding to the first medium conveying component 203a, the first medium conveying component 203a starts to convey the medium. At this time, the control strategy on the first motor changes from the first control strategy to the second control strategy, and its control parameter changes from the first parameter to the second parameter, so that the first medium conveying component 203a quickly and stably conveys the medium at the first conveying speed. When the medium enters the first preset area corresponding to the second medium conveying component 203b, the second conveying component 203b starts to convey the medium. At this time, the control strategy on the second motor changes from the first control strategy to the second control strategy, and the control parameter changes from the corresponding first parameter to the corresponding second parameter, so that the second medium conveying component 203b quickly and stably conveys the medium at the first conveying speed.

[0144] Figure 14 This is a schematic diagram of the motor drive control device structure of an image forming apparatus provided in one embodiment of this application.

[0145] Reference Figure 14 As shown, the control device may include: a control module 130, configured to execute a first control strategy to control the motor to rotate at a target speed before the medium conveying component conveys the medium; and to switch to executing a second control strategy to control the motor to drive the medium conveying component to convey the medium at the target speed when the medium conveying component starts conveying the medium.

[0146] Figure 15This is a schematic diagram of the motor drive control device structure of an image forming apparatus provided in one embodiment of this application.

[0147] Reference Figure 15 As shown, the controller may include a processor 1401 and a memory 1402. The memory 1402 is used to store at least one instruction. When the instruction is loaded and executed by the processor 1401, it implements the motor drive control method of the image forming apparatus provided in any embodiment of this application.

[0148] Figure 16 This is a schematic diagram of the structure of an image forming apparatus provided in one embodiment of the present application.

[0149] Reference Figure 16 As shown, the image forming apparatus may include a media transport component 1501, a motor 1502 that provides driving force to the media transport component, and a motor drive controller 1503 for the image forming apparatus. The motor drive controller 1503 of the image forming apparatus can be... Figure 15 The illustrated embodiment provides a motor drive control device for an image forming apparatus.

[0150] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the motor drive control method for an image forming apparatus provided in any embodiment of this application.

[0151] This application also provides a computer program product, including a computer program or instructions, which, when executed by a processor, implement the motor drive control method for an image forming apparatus provided in any embodiment of this application.

[0152] It is understood that the application may be a native app installed on the terminal, or it may be a web application in a browser on the terminal. This application embodiment does not limit this.

[0153] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0154] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0155] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0156] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0157] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0158] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A motor drive control method for an image forming apparatus, characterized in that, The image forming apparatus includes: a medium transport component and a motor providing driving force to the medium transport component; the method includes: Before the medium conveying component conveys the medium, a first control strategy is executed to control the motor to rotate at a target speed; When the medium conveying component starts conveying the medium, the second control strategy is switched to control the motor to drive the medium conveying component to convey the medium at the target speed. The first control strategy is used to control the motor to rotate at the target speed based on the first parameter, and the second control strategy is used to control the motor to drive the medium conveying component to convey the medium at the target speed based on the second parameter, wherein the first parameter is different from the second parameter.

2. The method according to claim 1, characterized in that, The image forming apparatus has a built-in speed adjustment unit, which is used to eliminate the deviation between the current speed and the target speed of the motor. Under the first parameter, the speed adjustment unit adjusts the speed of the motor by less than the speed adjustment unit adjusts the speed of the motor by less than the second parameter.

3. The method according to claim 1, characterized in that, The media conveying component includes at least two media conveying components, and the motor includes a first motor that provides driving force to the at least two media conveying components. The execution of the second control strategy to control the motor to drive the medium conveying component to convey the medium at the target rotation speed includes: The motor is controlled to drive the medium conveying component to convey the medium at the target rotational speed based on a series of different second parameters. When each of the at least two media conveying components starts conveying media, the motor is controlled to rotate at the target speed based on different second parameters for different media conveying components.

4. The method according to claim 1, characterized in that, The method further includes: After determining that the medium conveying component has started conveying the medium and a preset time has elapsed, the first control strategy is switched to control the motor to drive the medium conveying component to convey the medium.

5. The method according to claim 4, characterized in that, The duration of the preset time varies depending on the type of the medium conveying component or the size of the medium.

6. The method according to claim 1, characterized in that, The method further includes: After determining that the medium has entered the second preset area located downstream of the medium conveying component, the first control strategy is switched to control the motor to drive the medium conveying component to convey the medium.

7. The method according to claim 1, characterized in that, The media conveying component includes two adjacent first media conveying components and second media conveying components; the motor includes a first motor that provides driving force to the first media conveying components and a second motor that provides driving force to the second media conveying components; the method specifically includes: When it is determined that the first medium conveying component starts conveying the medium, the first motor is controlled to drive the first medium conveying component to convey the medium at a first conveying speed based on the second parameter; When it is determined that the second medium conveying component starts conveying the medium, the second motor is controlled based on the third parameter to drive the second medium conveying component to convey the medium at the first conveying speed.

8. The method according to any one of claims 1 to 7, characterized in that, The method for determining when the medium delivery component begins to deliver the medium includes: Based on the media transfer command issued by the image forming device, the media transport component is determined to start transporting the media.

9. The method according to claim 8, characterized in that, The image forming apparatus further includes a clutch component for transmitting or disconnecting the driving force supplied by the motor to the media transport component. The step of determining that the medium transport component starts transporting the medium based on a medium transport command includes: The clutch closure signal determines when the medium delivery component starts driving the medium.

10. The method according to any one of claims 1 to 7, characterized in that, The method for determining when the medium conveying component begins conveying the medium includes: When the medium conveying component is in a rotating state, it is determined that the medium enters the first preset area corresponding to the medium conveying component.

11. The method according to claim 10, characterized in that, The media conveying component being in a rotating state includes: the motor driving the media conveying component to rotate at a first conveying speed. When the second control strategy is switched to control the motor, the motor drives the medium conveying component to convey the medium at the first conveying speed at the target rotational speed.

12. The method according to claim 10, characterized in that, The determination that the medium enters the first preset area corresponding to the medium conveying component includes: Starting from the time the medium transmission command is sent, a first predetermined time is started, and it is determined that the medium has entered the first preset area. The duration of the first predetermined time varies depending on the type of medium transport component or the size of the medium. Based on the detection information of the detection component of the image forming device, if it is determined that the current transport position of the medium has reached the first reference position, then it is determined that the medium has entered the first preset area. The detection component is used to detect the transport position of the medium. The first reference position is the position when the medium reaches the medium transport component, or the position reached after a third predetermined time when the medium has traveled a first preset distance before reaching the medium transport component.

13. The method according to any one of claims 1 to 7, characterized in that, The media conveying components include at least one of the following: feed roller, transfer roller, correction roller, transfer roller, fixing roller, and discharge roller.

14. A motor drive control device for an image forming apparatus, characterized in that, The image forming apparatus includes: a media transport component and a motor providing driving force to the media transport component; the device includes: The control module is configured to execute a first control strategy to control the motor to rotate at a target speed before the medium conveying component conveys the medium; and to switch to executing a second control strategy to control the motor to drive the medium conveying component to convey the medium at the target speed when the medium conveying component starts conveying the medium. The first control strategy is used to control the motor to rotate at the target speed based on the first parameter, and the second control strategy is used to control the motor to drive the medium conveying component to convey the medium at the target speed based on the second parameter, wherein the first parameter is different from the second parameter.

15. A motor drive control device for an image forming apparatus, characterized in that, The control device includes: A processor and a memory, the memory being used to store at least one instruction that, when loaded and executed by the processor, implements the motor drive control method of the image forming apparatus as described in any one of claims 1-13.

16. An image forming apparatus, characterized in that, The device includes: The medium transport component, the motor that provides driving force to the medium transport component, and the motor drive control device for the image forming apparatus of claim 14.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the motor drive control method of the image forming apparatus as described in any one of claims 1-13.

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