A continuous light curing control method, system, device and medium

Abstract

The present invention relates to the field of 3D printing, and discloses a continuous light-curing control method, system, device and medium, comprising acquiring printing data from an interactive device; acquiring platform motion data and DMD data according to the printing data; acquiring motor parameters from a printing platform, and acquiring driving data according to the motor parameters and the platform motion data; controlling the movement of the printing platform according to the driving data, and controlling the DMD device to perform an exposure operation according to the DMD data, so that the printing platform and the DMD device cooperate to perform light-curing printing; in the light-curing printing process, acquiring real-time data from the printing platform, and obtaining optimized platform motion data according to the real-time data and the platform motion data; realizing continuous light-curing printing by optimizing and adjusting the movement of the printing platform in real time, so that the printed ceramic material can be continuously formed without interruption, thereby improving the forming efficiency, and significantly improving the efficiency and output of light-curing 3D printing.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a continuous light curing control method, system, equipment and medium. Background Art

[0002] In recent years, additive manufacturing technology has achieved near-net-shape formation of complex structural ceramic parts, effectively overcoming the huge limitations of the design and manufacturing process of key ceramic components. However, current ceramic additive manufacturing adopts a layer-by-layer printing method, which has obvious limitations because each layer needs to be cured and processed separately, which limits the forming efficiency and low printing efficiency.

[0003] Therefore, for printing ceramic materials, there is an urgent need for a printing method that can improve printing efficiency. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a continuous light-curing control method, system, equipment and medium, which optimizes the movement of the printing platform in real time through real-time monitoring and feedback mechanism, accurately controls the coordinated work of the printing platform and the DMD device, ensures the matching of image switching and the printing platform, and realizes continuous light-curing printing, so that the printed ceramic material can be continuously formed without interruption, thereby improving the forming efficiency and significantly improving the efficiency and output of light-curing 3D printing.

[0005] A first aspect of the present invention provides a continuous light curing control method, which is applied to a continuous light curing control system, wherein the continuous light curing control system comprises: an industrial control device and an interactive device electrically connected to the industrial control device, a DMD device and a printing platform; the DMD device and the printing platform cooperate to complete light curing printing, and the interactive device is used to input printing data; the continuous light curing control method comprises the steps of:

[0006] Get print data from interactive device;

[0007] Obtain platform motion data and DMD data according to the printing data;

[0008] Get motor parameters from the printing platform, and get drive data based on the motor parameters and platform motion data;

[0009] The printing platform is controlled to move according to the driving data, and the DMD device is controlled to perform exposure operation according to the DMD data, so that the printing platform and the DMD device can cooperate to perform light-curing printing;

[0010] During the light-curing printing process, real-time data is obtained from the printing platform, and optimized platform motion data is obtained based on the real-time data and platform motion data;

[0011] The optimized driving data is obtained according to the optimized platform motion data, and the printing platform motion is adjusted in real time according to the optimized driving data until the light-curing printing is completed.

[0012] Optionally, in a first implementation method of the first aspect of the present invention, the platform motion data and DMD data are obtained according to the printing data, including: the printing data includes exposure time data, first exposure data, slice thickness data and model data; switching frequency data is obtained according to the exposure time data and the slice thickness data; the total platform motion distance is obtained according to the model data, the platform motion speed is obtained according to the switching frequency data, and the platform motion data is obtained according to the total platform motion distance and the platform motion speed; DMD light source data is obtained according to the exposure time data and the first exposure data, the model data is sliced ​​according to the slice thickness data to obtain pattern data, DMD device data is obtained according to the pattern data and the switching frequency data, and DMD data is obtained according to the DMD light source data and the DMD device data.

[0013] Optionally, in a second implementation method of the first aspect of the present invention, the motor parameters are obtained from the printing platform, and the driving data are obtained based on the motor parameters and the platform motion data, including: obtaining the motor parameters from the printing platform, and obtaining the total platform motion distance and the platform motion speed based on the platform motion data; obtaining the number of pulses based on the motor parameters and the total platform motion distance; obtaining the pulse frequency based on the motor parameters and the platform motion speed; and obtaining the driving data based on the number of pulses and the pulse frequency.

[0014] Optionally, in a third implementation method of the first aspect of the present invention, the printing platform is controlled to move according to the driving data, and the DMD device is controlled to perform exposure operation according to the DMD data, so that the printing platform and the DMD device work together to perform photocuring printing, including: controlling the DMD device to preheat according to preset preheating conditions; after the DMD device is preheated, the printing platform is controlled to move according to the driving data, and the DMD device is controlled to perform exposure operation according to the DMD data, so that the printing platform and the DMD device work together to perform photocuring printing.

[0015] Optionally, in a fourth implementation of the first aspect of the present invention, during the photocuring printing process, real-time data is obtained from the printing platform, and optimized platform motion data is obtained based on the real-time data and the platform motion data, including: during the photocuring printing process, position information is obtained from the printing platform; rotation distance and motor speed are obtained based on the position information; real-time data is obtained based on the rotation distance and motor speed; real-time data is compared with the platform motion data to obtain difference data; and the platform motion data is corrected based on the difference data to obtain optimized platform motion data.

[0016] Optionally, in a fifth implementation of the first aspect of the present invention, the optimized driving data is obtained according to the optimized platform motion data, and the printing platform motion is adjusted in real time according to the optimized driving data until the photocuring printing is completed, including: obtaining the optimized driving data according to the optimized platform motion data and motor parameters; adjusting the printing platform motion in real time according to the optimized driving data, so that the printing platform and the DMD device work together until the photocuring printing is completed.

[0017] Optionally, in a sixth implementation of the first aspect of the present invention, the continuous light curing control system also includes a limit device, which is electrically connected to the printing platform; during the light curing printing process, real-time data is obtained from the motor, and after the optimized platform motion data is obtained based on the real-time data and the platform motion data, it also includes: detecting the movement process of the printing platform through the limit device to obtain the printing platform position information; comparing the printing platform position information with the preset limit information, and if the printing platform position information is greater than the limit information, generating a limit signal through the limit device; the limit signal is used to terminate the operation of the printing platform.

[0018] A second aspect of the present invention provides a continuous light curing control system, the continuous light curing control system comprising an industrial control device and an interactive device electrically connected to the industrial control device, a DMD device and a printing platform; the industrial control device is used to execute any of the continuous light curing control methods described above to achieve work control;

[0019] A third aspect of the present invention provides a continuous light curing control device, the continuous light curing control device comprising: a memory and at least one processor, the memory storing instructions;

[0020] At least one of the processors calls the instructions in the memory to enable the continuous light-curing control device to perform each step of the continuous light-curing control method as described in any one of the above items.

[0021] A fourth aspect of the present invention provides a computer-readable storage medium, on which instructions are stored, and when the instructions are executed by a processor, the various steps of the continuous light curing control method as described in any one of the above items are implemented.

[0022] In the technical solution of the present invention, the interactive device, the DMD device and the printing platform are controlled to work together through the industrial control device, so as to realize efficient light-curing 3D printing; after obtaining the printing data from the interactive device, the platform motion data and the DMD data are parsed; the driving data are generated according to the motor parameters and the platform motion data, the movement of the printing platform is controlled according to the driving data, and the DMD device is controlled to perform transmission exposure according to the DMD data, so that the printing platform and the DMD device work together to perform light-curing printing; during the printing process, the printing platform is monitored in real time and real-time data is obtained, and the movement of the printing platform is optimized in real time through the real-time monitoring and feedback mechanism, and the collaborative work of the printing platform and the DMD device is accurately controlled to ensure the matching of image switching and the printing platform, so as to realize continuous light-curing printing, so that the printed ceramic material can be continuously formed without interruption, thereby improving the forming efficiency and significantly improving the efficiency and output of light-curing 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 1 ;

[0025] Figure 2 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 2 ;

[0026] Figure 3 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 3 ;

[0027] Figure 4 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 4 ;

[0028] Figure 5 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 5 ;

[0029] Figure 6 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 6 ;

[0030] Figure 7 The process of the continuous light curing control method provided by the embodiment of the present invention Figure 7 ;

[0031] Figure 8 A schematic diagram of the structure of a continuous light curing control system provided by an embodiment of the present invention;

[0032] Fig. 9 A schematic structural diagram of a continuous light curing control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention provides a continuous light-curing control method, system, device and medium to overcome the shortcomings of the existing layer-by-layer printing technology in ceramic additive manufacturing; the present invention controls the interactive device, DMD device and printing platform to work together through an industrial control device, thereby realizing efficient light-curing 3D printing; after obtaining printing data from the interactive device, the platform motion data and DMD data are parsed; drive data is generated according to motor parameters and platform motion data, the movement of the printing platform is controlled according to the drive data, and the DMD device is controlled to perform transmission exposure according to the DMD data, so that the printing platform and the DMD device work together to perform light-curing printing; during the printing process, the printing platform is monitored in real time and real-time data is obtained, the drive data is continuously optimized through the real-time data, the movement of the printing platform is optimized and adjusted, so that the printing platform and the DMD device can work precisely together, ensure the matching of image switching and printing platform, realize continuous light-curing printing, and significantly improve the efficiency and output of light-curing 3D printing.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] For ease of understanding, the specific process of the embodiment of the present invention is described below. Figure 1 , an embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0036] The continuous light-curing control system comprises: an industrial control device and an interactive device electrically connected to the industrial control device, a DMD device and a printing platform; the DMD device and the printing platform cooperate to complete light-curing printing, and the interactive device is used to input printing data.

[0037] In one embodiment, the printing platform includes a control board, a motor and a molding platform; the industrial control device, the interactive device and the DMD device are the upper system, and the control board, the motor and the molding platform are the lower system; the industrial control device is used as the control center of the upper system to control the interactive device and the DMD device; the interactive interface is used to input printing data, and the industrial control device and the interactive device are transmitted through the serial port. The DMD device (digital micromirror device) is divided into a DMD device and a DMD light source; the DMD device is used to control the switching of the printing pattern, and the DMD light source is used to output the projection light; the industrial control device is connected to the DMD light source through the HDMI interface to control the operation of the DMD light source; the industrial control device is connected to the DMD device through the serial port, and the pattern data is transmitted to the DMD device at a high speed to guide the DMD device to perform pattern switching. The control board serves as the control center of the lower system and is used to control the movement of the motor, thereby indirectly controlling the molding platform. The control board is connected to the motor through the GPIO interface. The motor accurately controls the movement of the molding platform on the Z axis through its internal drive mechanism (such as a stepper motor, servo motor, etc.). The industrial control device and the control board communicate bidirectionally through the serial port to realize information transmission between the upper system and the lower system. The serial port baud rate can be set to 115200. The industrial control device can be a QT platform, and the control board can be a LINUX control board.

[0038] The continuous light curing control method comprises the steps of:

[0039] 101. Obtaining print data from an interactive device;

[0040] In this embodiment, the interactive device and the industrial control device are connected via serial port communication, and the user inputs printing data through the interactive device; the printing data includes exposure time data, first exposure data, slice thickness data and model data; in some embodiments, the model data itself carries preset slice thickness data and exposure data; the industrial control device receives and parses these data to prepare for subsequent processing steps.

[0041] 102. Obtaining platform motion data and DMD data according to the printing data;

[0042] In this embodiment, a special algorithm or slicing software is run inside the industrial control device to convert the printing data input by the user into platform motion data and DMD data. The DMD device is divided into a DMD device and a DMD light source; the DMD device is used to control the switching of the printing pattern and the exposure control, and the DMD light source is used to output the projection light; the industrial control device is connected to the DMD light source through the HDMI interface to control the operation of the DMD light source; the industrial control device is connected to the DMD device through the serial port to transmit the pattern data to the DMD device at high speed. The platform motion data is used to guide the moving mileage and speed of the printing platform on the Z axis; the industrial control device transmits the platform motion data to the control board, and the control board further processes the platform motion data.

[0043] 103. Obtain motor parameters from the printing platform, and obtain drive data according to the motor parameters and platform motion data;

[0044] In this embodiment, the printing platform first receives the platform motion data from the industrial control device, and then obtains the motor parameters from the motor in the printing platform; based on these motor parameters and the platform motion data, the printing platform can calculate the drive data; the drive data is used to control the motor movement in the printing platform, and then control the movement of the printing platform through the motor.

[0045] 104. Control the movement of the printing platform according to the driving data, and control the DMD device to perform exposure operation according to the DMD data, so that the printing platform and the DMD device cooperate to perform light-curing printing;

[0046] In this embodiment, the control board in the printing platform converts the driving data into signals that the motor can understand (such as PWM signals, stepping signals, etc.) and transmits them to the motor; after receiving these signals, the motor drives the printing platform to move at a specified speed and direction; at the same time, the DMD device controls the micromirror array thereon to flip quickly according to the received DMD data, and projects light onto a specific area on the printing platform to perform exposure operations; the printing platform and the DMD device work together to perform photocuring printing.

[0047] 105. During the light-curing printing process, real-time data is obtained from the printing platform, and optimized platform motion data is obtained based on the real-time data and the platform motion data;

[0048] In this embodiment, during the printing process, the control board in the printing platform continuously obtains real-time data of the motor from the motor sensor, including the motor speed and the rotation distance; these data are fed back to the industrial control device in real time, and compared and analyzed with the platform motion data; the industrial control device optimizes the original platform motion data according to the real-time data, obtains the optimized platform data, and sends the optimized platform data back to the printing platform. The optimized platform data is used to reduce the error of the light-curing printing process, improve the printing accuracy, and make the collaborative work of the printing platform and the DMD device more accurate.

[0049] 106. Obtain optimized driving data according to the optimized platform motion data, and adjust the printing platform motion in real time according to the optimized driving data until the light-curing printing is completed;

[0050] In this embodiment, the industrial control device transmits the optimized platform motion data to the printing platform through the serial port; the printing platform again uses the optimized platform motion data to calculate more accurate optimized drive data; the optimized drive data is sent to the motor, and the motor adjusts its motion state in real time according to the optimized drive data to more accurately control the movement of the printing platform; this process continues during the printing process until the entire 3D model is completely printed; in this way, the light-curing printing system can achieve high-precision and high-efficiency printing operations.

[0051] In the process of photocuring 3D printing, the printing data is first input to the industrial control device through the interactive device. The industrial control device analyzes the data, generates platform motion data and DMD data, and transmits them to the printing platform and DMD device respectively. The printing platform obtains motor parameters from the motor, and calculates accurate drive data based on the motor parameters and platform motion data; the movement of the motor is controlled according to the drive data, and then the movement of the printing platform is controlled. At the same time, the DMD device performs exposure operations according to the DMD data, and works with the printing platform to complete photocuring printing; during the printing process, the printing platform continuously feeds back real-time data to the industrial control device, and the industrial control device uses the real-time data to optimize the platform motion data, generates new optimized drive data based on the optimized platform data, and uses the optimized drive data to adjust the movement of the printing platform until the printing process is successfully completed. Through the real-time monitoring and feedback mechanism, the movement of the printing platform is optimized in real time, the collaborative work of the printing platform and the DMD device is accurately controlled, the matching of image switching and printing platform is ensured, and continuous photocuring printing is achieved, which significantly improves the efficiency and output of photocuring 3D printing.

[0052] In this embodiment, since the industrial control device can transmit DMD data at high frequency, the DMD equipment can switch the slicing pattern at high speed, and at the same time, the printing platform is lifted at high speed to cooperate with the DMD equipment to carry out continuous light-curing printing, so that the speed of the entire printing process is greatly accelerated, reaching more than 500mm / h, and the printing accuracy can be maintained at a high level of 2um.

[0053] See also Figure 2 , a second embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0054] 201. The printing data includes exposure time data, first exposure data, slice thickness data and model data;

[0055] In this embodiment, the printing data specifically includes exposure time data, first exposure data, slice thickness data and model data. The exposure time data determines the exposure time of the DMD light source when printing each layer. The first exposure data is usually longer than the subsequent exposure time to ensure the firmness of the first layer printing. The slice thickness data defines the thickness of each layer during the printing process, and the model data is the complete geometric information of the 3D model that the user wants to print.

[0056] 202. Obtain switching frequency data according to the exposure time data and the slice thickness data;

[0057] In this embodiment, the switching frequency data is calculated based on the exposure time data and the slice thickness data. Since the DMD light source needs to switch quickly to project different slice patterns during continuous light curing printing, the switching rate (i.e., frequency) is particularly important. The switching rate can be obtained by dividing the slice thickness by the exposure time. This value reflects how long the DMD light source needs to complete the switching of a layer of pattern to ensure the continuity and accuracy of printing.

[0058] 203. Obtain the total platform movement distance according to the model data, obtain the platform movement speed according to the switching frequency data, and integrate the total platform movement distance and the platform movement speed to obtain the platform movement data;

[0059] In this embodiment, the platform motion data is the key information to guide how the printing platform moves. First, based on the model data, the total distance of the platform movement can be calculated. This distance is equal to the slice thickness multiplied by the total number of slice layers. The total number of slice layers can be obtained by slicing the model data through the slicing software. Next, using the switching frequency data, the speed of the platform movement can be calculated. This speed is equal to the switching rate of the slice pattern, ensuring the synchronization of the DMD light source switching and the movement of the printing platform; finally, the total distance and speed of the platform movement are integrated to obtain the complete platform motion data.

[0060] 204. Obtain DMD light source data according to the exposure time data and the first exposure data, slice the model data according to the slice thickness data to obtain pattern data, obtain DMD device data according to the pattern data and the switching frequency data, and integrate the DMD light source data and the DMD device data to obtain DMD data;

[0061] In this embodiment, DMD data is the key information guiding the DMD device on how to project the light source. First, based on the exposure time data and the first exposure data, the intensity and duration of the DMD light source can be calculated to obtain the DMD light source data; then, the model data is sliced ​​according to the slice thickness data to obtain the slice pattern data of each layer; then, based on the pattern data and the switching frequency data, the projection order and time of the DMD device can be calculated to obtain the DMD device data; finally, the DMD light source data and the DMD device data are integrated to obtain the complete DMD data.

[0062] In this embodiment, the industrial control device serves as the control center of the entire printing system, and is responsible for transmitting the platform motion data and DMD data to the printing platform and DMD equipment respectively; the industrial control device is connected to the DMD light source through the HDMI interface to control the operation of the DMD light source; the industrial control device is connected to the DMD device through the serial port, and transmits the pattern data to the DMD device at high speed to guide the DMD device to perform pattern switching; the industrial control device and the control board in the printing platform perform two-way communication through the serial port.

[0063] See also Figure 3 , a third embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0064] 301. Obtain motor parameters from the printing platform, and obtain the total platform movement distance and platform movement speed according to the platform movement data;

[0065] In this embodiment, during the continuous light-curing 3D printing process, the control board needs to communicate with the motor to obtain the working parameters of the motor; these motor parameters include but are not limited to the motor's subdivision settings, maximum pulse frequency, step angle, etc.; the number of pulses and pulse frequency can be calculated based on the motor parameters; the number of pulses and pulse frequency are used to control the motor movement; the total platform movement distance and platform movement speed are extracted from the platform movement data for subsequent calculation steps.

[0066] 302. Obtain the number of pulses according to the motor parameters and the total distance of platform movement;

[0067] In this embodiment, after obtaining the motor parameters, the control board needs to calculate the required number of pulses based on the total distance of the platform movement. Since the movement of the stepper motor is discrete, each pulse will cause the motor to rotate a fixed angle, thereby driving the printing platform to move a certain distance; in this embodiment, the motor is subdivided into 4,160 pulses corresponding to 1mm movement of the printing platform. Therefore, the number of pulses of the stepper motor corresponding to the total distance of the printing platform lifting movement can be calculated by the following formula: Number of pulses = (subdivision × first motor motion constant) × total distance of the printing platform lifting movement; it should be noted that the above-mentioned first motor motion constant is used to convert the number of pulses to the actual movement distance of the printing platform, and the specific value may vary depending on the characteristics of the motor and the platform.

[0068] 303. Obtaining the pulse frequency according to the motor parameters and the platform movement speed;

[0069] In this embodiment, the pulse frequency determines the number of pulses received by the stepper motor per second, thereby determining the movement speed of the printing platform; pulse frequency = movement speed of the printing platform × second motor motion constant; it should be noted that the above-mentioned second motor motion constant is used to convert the speed into the number of pulses per second, and the specific value may vary depending on the characteristics of the motor and the platform.

[0070] 304. Obtain driving data according to the pulse quantity and the pulse frequency;

[0071] In this embodiment, the control board combines the calculated pulse quantity and pulse frequency to obtain drive data, and sends the drive data to the motor. The drive data instructs the motor to move the printing platform at the correct speed and number of steps, thereby achieving accurate 3D printing; before sending the drive data, the control board performs necessary verification and correction to ensure the accuracy and reliability of the data.

[0072] See also Figure 4 , a fourth embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0073] 401. Control the DMD device to preheat according to a preset preheating condition;

[0074] In this embodiment, before continuous light-curing 3D printing begins, the DMD needs to be preheated to ensure that it reaches the best working state. During the preheating process, the light source and other components inside the DMD will gradually heat up to achieve stable output performance and life. The preheating time may vary depending on the device model and working environment, but it is usually completed within a few minutes; after the preheating is completed, the DMD device will transmit a preheating completion signal to the industrial control device, indicating that it is ready for subsequent printing operations.

[0075] 402. After the DMD device is preheated, the printing platform is controlled to move according to the drive data, and the DMD device is controlled to perform exposure operation according to the DMD data, so that the printing platform and the DMD device work together to perform light-curing printing;

[0076] In this embodiment, the industrial control device receives the preheating completion signal of the DMD device, and synchronously issues a job start instruction to the DMD device and the control board in the printing platform; this instruction marks the official start of the light curing process; when sending the instruction, the industrial control device will ensure that the DMD device and the control board receive the instruction at the same time to ensure the synchronization and coordination of the printing process. After receiving the job start instruction, the control board transmits the drive data to the motor in the printing platform, and the motor controls the movement of the molding platform according to the drive data. At the same time, the DMD device will also perform exposure operations according to the received DMD data, so that the printing platform and the DMD device start the operation synchronously; under the coordinated work of the printing platform and the DMD device, the continuous light curing 3D printing process can proceed smoothly; the printing platform is continuously lifted, and the DMD device continuously projects the slice pattern for exposure operations.

[0077] See also Figure 5 The fifth embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0078] 501. During the light-curing printing process, position information is obtained from the printing platform;

[0079] In this embodiment, a Hall sensor is used and installed close to the motor in the printing platform, which can capture the marking points or magnetic changes on the motor rotor in real time, thereby accurately obtaining the displacement information of the motor rotor.

[0080] 502. Obtaining a rotation distance and a motor speed according to the position information;

[0081] In this embodiment, an encoder is provided in the printing platform, and the encoder receives the displacement information transmitted by the Hall sensor, and decodes and calculates the precise rotation distance and the motor speed of the motor according to the displacement information.

[0082] 503. Obtaining real-time data according to the rotation distance and the motor speed;

[0083] In this embodiment, the control board in the printing platform receives the two data representing the degree of motor movement, namely the rotation distance and the motor speed, and then converts these data into real-time data that can be recognized by the industrial control device through the built-in algorithm, and transmits the real-time data to the industrial control device through the serial port.

[0084] 504. Compare the real-time data with the platform motion data to obtain difference data;

[0085] In this embodiment, the industrial control device compares the platform motion data with the real-time data and identifies the difference data between the two; the difference data includes position deviation, speed deviation, etc.

[0086] 505. Correct the platform motion data according to the difference data to obtain optimized platform motion data;

[0087] In this embodiment, the industrial control device corrects the platform motion data in real time based on the difference data to eliminate or minimize the error and obtain optimized platform motion data. It should be noted that the above process is continuously carried out during the printing process to form a closed-loop control system; the sensor in the printing platform continuously monitors the motor motion data, and the control board converts and outputs these data to the industrial control device, which corrects the platform motion data based on these data to ensure that the motor can accurately drive the molding platform to move during the entire printing process; in this way, the movement of the printing platform can be accurately matched with the exposure operation of the DMD device, realizing continuous light-curing printing without interruption.

[0088] See also Figure 6 The sixth embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0089] 601. Obtain optimized driving data according to the optimized platform motion data and motor parameters;

[0090] In this embodiment, after the industrial control device completes the optimization of the platform motion data, it transmits the optimized platform data back to the printing platform through serial communication. After the printing platform receives the optimized drive data, the control board in the printing platform reconverts the optimized platform data into optimized drive data for driving the motor according to the motor parameters, and transmits the optimized drive data to the motor through the GPIO interface in real time.

[0091] 602. Adjust the movement of the printing platform in real time according to the optimized driving data, so that the printing platform and the DMD device work together until the light-curing printing is completed;

[0092] In this embodiment, after the motor receives the optimized driving data from the control board, it adjusts its output torque and speed in real time according to these data, thereby accurately controlling the movement of the forming platform; driven by the motor, the forming platform moves accurately along a preset trajectory to ensure that each layer of printing material can be accurately positioned and cured; at the same time, the DMD device accurately controls the switching and intensity of the light source according to the data of the printing model, and projects light onto the printing material on the forming platform to cause a photocuring reaction.

[0093] See also Figure 7 The seventh embodiment of the continuous light curing control method in the embodiment of the present invention includes:

[0094] The continuous light curing control system further includes a limiting device, and the limiting device is electrically connected to the printing platform;

[0095] In this embodiment, the limit device is electrically connected to the control board in the printing platform through the GPIO interface. The printing platform reads the limit device in real time and makes corresponding instructions based on the output data of the limit device. The limit device is used to detect whether the movement of the printing platform exceeds the preset value.

[0096] 701. Detect the movement process of the printing platform through the limit device to obtain the position information of the printing platform;

[0097] In this embodiment, the limit device is usually installed on the movement path of the forming platform, and can be a mechanical limit switch (such as a contact switch, a magnetic switch, etc.) or a photoelectric limit sensor (such as an infrared sensor, a laser sensor, etc.); during the movement of the forming platform, the limit device will detect its position changes in real time and obtain the position information of the printing platform.

[0098] 702. Compare the printing platform position information with the preset limit information. If the printing platform position information is greater than the limit information, generate a limit signal through a limit device; the limit signal is used to terminate the operation of the printing platform;

[0099] In this embodiment, a controller inside or connected to the limit device will pre-store a set of limit information, which defines the maximum range or specific position that the molding platform can safely move; during the movement of the molding platform, the limit device will compare the detected position information with the preset limit information in real time; if the position information exceeds the preset limit information, the limit device will immediately send a limit signal to the control board. When the control board receives the limit signal from the limit device, it will immediately recognize that this is an emergency situation and the motor movement needs to be stopped immediately to prevent equipment damage or printing failure; therefore, the control board will send a stop signal to the motor through GPIO, and the motor will immediately stop its movement after receiving the stop signal, thereby ensuring that the molding platform stays in a safe position, thereby terminating the printing platform work.

[0100] The above describes the continuous light curing control method in the embodiment of the present invention. The following describes the continuous light curing control system in the embodiment of the present invention. Figure 8 , an embodiment of the continuous light curing control system in the embodiment of the present invention includes:

[0101] The continuous light curing control system includes: an industrial control device 801, an interactive device 802, a DMD device 803, a printing platform 804 and a limit device 805;

[0102] The DMD device 803 includes: a DMD device 8031 ​​and a DMD light source 8032;

[0103] The printing platform 804 includes: a control board 8041 , a motor 8042 and a molding platform 8043 .

[0104] The continuous light curing control system of the embodiment of the present invention can realize high-frequency switching of the slice pattern and high-speed transmission to the DMD, with a switching frequency of more than 50HZ; the 3D printing resolution is 2716×1528; the 3D printing speed is greater than 500mm / h, and the printing accuracy reaches 2 microns.

[0105] Fig. 9 9 is a schematic diagram of the structure of a continuous light curing control device provided by an embodiment of the present invention. The continuous light curing control device 900 may have relatively large differences due to different configurations or performances, and may include one or more processors (central processing units, CPU) 910 (for example, one or more processors) and a memory 920, and one or more storage media 930 (for example, one or more mass storage devices) storing application programs 933 or data 932. Among them, the memory 920 and the storage medium 930 can be short-term storage or permanent storage. The program stored in the storage medium 930 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations in the continuous light curing control device 900. Furthermore, the processor 910 can be configured to communicate with the storage medium 930, and execute a series of instruction operations in the storage medium 930 on the continuous light curing control device 900 to implement the steps of the continuous light curing control method provided by the above-mentioned method embodiments.

[0106] The continuous light curing control device 900 may also include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input and output interfaces 960, and / or one or more operating systems 931, such as Windows Serve, Mac OS X, Unix, Linux, FreeBSD, etc. It will be appreciated by those skilled in the art that Fig. 9 The structure of the continuous light-curing control device shown does not constitute a limitation on the continuous light-curing control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0107] The present invention also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instructions are executed on a computer, the computer executes the steps of the continuous light curing control method.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device, or unit can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0109] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0110] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous light curing control method, characterized in that: Applied to a continuous light curing control system, the continuous light curing control system comprises: an industrial control device and an interactive device electrically connected to the industrial control device, a DMD device and a printing platform; the DMD device and the printing platform cooperate to complete light curing printing, and the interactive device is used to input printing data; the continuous light curing control method comprises the steps of: Get print data from interactive device; Obtain platform motion data and DMD data according to the printing data; Get motor parameters from the printing platform, and get drive data based on the motor parameters and platform motion data; The printing platform is controlled to move according to the driving data, and the DMD device is controlled to perform exposure operation according to the DMD data, so that the printing platform and the DMD device can cooperate to perform light-curing printing; During the light-curing printing process, real-time data is obtained from the printing platform, and optimized platform motion data is obtained based on the real-time data and platform motion data; The optimized driving data is obtained according to the optimized platform motion data, and the printing platform motion is adjusted in real time according to the optimized driving data until the light-curing printing is completed.

2. The continuous light curing control method according to claim 1, characterized in that: The step of obtaining platform motion data and DMD data according to the printing data includes: The printing data includes exposure time data, first exposure data, slice thickness data and model data; Obtain switching frequency data according to exposure time data and slice thickness data; The total distance of platform movement is obtained according to the model data, the platform movement speed is obtained according to the switching frequency data, and the platform movement data is obtained according to the total distance of platform movement and the platform movement speed; DMD light source data is obtained according to exposure time data and first exposure data, pattern data is obtained by slicing model data according to slice thickness data, DMD device data is obtained according to pattern data and switching frequency data, and DMD data is obtained according to DMD light source data and DMD device data.

3. The continuous light curing control method according to claim 2, characterized in that: The step of obtaining motor parameters from the printing platform and obtaining driving data according to the motor parameters and platform motion data includes: Get the motor parameters from the printing platform, and obtain the total platform movement distance and platform movement speed based on the platform movement data; Get the number of pulses based on the motor parameters and the total distance the platform moves; The pulse frequency is obtained according to the motor parameters and the platform movement speed; The driving data is obtained based on the pulse number and pulse frequency.

4. The continuous light curing control method according to claim 1, characterized in that: The method of controlling the movement of the printing platform according to the driving data and controlling the DMD device to perform exposure operation according to the DMD data, so that the printing platform and the DMD device cooperate to perform light-curing printing, includes: Control the DMD device to preheat according to the preset preheating conditions; When the DMD device is preheated, the printing platform is controlled to move according to the drive data, and the DMD device is controlled to perform exposure operations according to the DMD data, so that the printing platform and the DMD device work together to perform light-curing printing.

5. The continuous light curing control method according to claim 1, characterized in that: In the light-curing printing process, real-time data is obtained from the printing platform, and optimized platform motion data is obtained according to the real-time data and the platform motion data, including: During the light-curing printing process, position information is obtained from the printing platform; Obtain the rotation distance and motor speed according to the position information; Get real-time data based on the rotation distance and motor speed; Compare the real-time data with the platform motion data to obtain difference data; The platform motion data is corrected according to the difference data to obtain optimized platform motion data.

6. The continuous light curing control method according to claim 1, characterized in that: The step of obtaining optimized driving data according to the optimized platform motion data, and adjusting the printing platform motion in real time according to the optimized driving data until the photocuring printing is completed, includes: Obtain optimized driving data based on optimized platform motion data and motor parameters; The printing platform movement is adjusted in real time according to the optimized drive data, so that the printing platform and DMD device work together until the light-curing printing is completed.

7. The continuous light curing control method according to claim 1, characterized in that: The continuous light-curing control system further includes a limit device, which is electrically connected to the printing platform; during the light-curing printing process, after obtaining real-time data from the motor and optimizing the platform motion data according to the real-time data and the platform motion data, the system further includes: The movement process of the printing platform is detected by the limit device to obtain the position information of the printing platform; The printing platform position information is compared with the preset limit information. If the printing platform position information is greater than the limit information, a limit signal is generated by the limit device; the limit signal is used to terminate the operation of the printing platform.

8. A continuous light curing control system, characterized in that: The continuous light curing control system includes an industrial control device and an interactive device electrically connected to the industrial control device, a DMD device and a printing platform; the industrial control device is used to execute the continuous light curing control method as described in any one of claims 1-7.

9. A continuous light curing control device, characterized in that: The continuous light curing control device comprises: a memory and at least one processor, wherein instructions are stored in the memory; At least one of the processors calls the instructions in the memory to enable the continuous light-curing control device to execute each step of the continuous light-curing control method according to any one of claims 1 to 7.

10. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by a processor, the various steps of the continuous light curing control method according to any one of claims 1 to 7 are implemented.

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