Optical engine calibration method of printing device, printing device, apparatus and storage medium

Abstract

The application relates to a light-mechanism calibration method of a printing device, the printing device, an apparatus, a storage medium and a computer program product. The method comprises the following steps: controlling a laser module to emit target laser towards a beam splitter prism; the target laser after beam splitting passes through a light reflection surface of a resin groove and the beam splitter prism, so that first reflection laser in a horizontal direction and second reflection laser in a vertical direction are obtained; according to an angle adjustment operation on the laser module, the laser module is controlled, the first reflection laser is concentric with the target laser, the second reflection laser forms a first light spot at the top of the beam splitter prism, and a second light spot is formed through a forming support plate surface of the printing device; the horizontal position of a laser beam splitting device and the angle orientation of the light-mechanism are adjusted until the projection light beam of the light-mechanism is coincident with the first and second light spots at the same time, and the current angle of the light-mechanism is saved as a calibration parameter of the light-mechanism. According to the method, the light-mechanism calibration operation is not needed when the light-mechanism is replaced on a customer site, and the workload of on-site technical personnel is reduced.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to an optomechanical calibration method for a printing device, a printing device, an apparatus, a storage medium, and a computer program product. Background Technology

[0002] 3D printing is a new type of rapid prototyping technology. Based on a 3D digital model, it combines an automated molding system to create 3D objects by layering and accumulating materials. As printing equipment is used for a long time, the optical engine inevitably faces power attenuation and structural wear, resulting in poor accuracy and non-compliant dimensions of the printed 3D objects. Therefore, it is necessary to replace and calibrate the optical engine of the printing equipment.

[0003] The existing method often involves sending the entire optical engine back to the factory to replace worn parts. This method is time-consuming and labor-intensive. The optical engine with replaced parts also needs to be recalibrated before it can be put into use, which further increases the workload of the technicians. Summary of the Invention

[0004] Therefore, it is necessary to provide an optomechanical calibration method, apparatus, computer equipment, computer-readable storage medium, and computer program product for printing equipment that can improve the calibration efficiency of the optomechanical system, in response to the above-mentioned technical problems.

[0005] In a first aspect, this application provides an optomechanical calibration method for a printing device, the printing device comprising: an optomechanical system disposed at the lower part of the printing device body, a resin tank disposed at the upper part of the printing device body, a beam splitter, a laser module, and a forming tray surface, wherein the beam splitter and the laser module are disposed between the resin tank and the forming tray surface, the beam splitter being horizontally disposed on the resin tank, and the beam splitter and the laser module forming a laser beam splitting device, the method comprising:

[0006] The laser module is controlled to emit a target laser toward the beam splitter; wherein the beam splitter splits the target laser into a split target laser; the split target laser passes through the light reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction.

[0007] In response to the angle adjustment operation of the laser module, the laser module is controlled so that the first reflected laser is concentric with the target laser, and the second reflected laser forms a first spot through the top of the beam splitter and a second spot through the forming tray surface of the printing device.

[0008] Adjust the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots simultaneously, and save the current angle of the optical engine as the calibration parameters of the optical engine.

[0009] In one embodiment, controlling the laser module in response to an angle adjustment operation of the laser module to make the first reflected laser concentric with the target laser includes:

[0010] Adjust the angle of the laser module to obtain the reflected light spot of the first reflected laser;

[0011] If the number of reflected light spots of the first reflected laser exceeds a preset value, then the relevant reflecting surface of the target laser is obtained;

[0012] Based on the light-reflecting surfaces of the beam splitter and the resin tank, the relevant reflective surfaces of the target laser are screened out to obtain abnormal reflective surfaces;

[0013] The abnormal reflective surface is blocked, and the angle of the laser module is readjusted to make the first reflected laser concentric with the target laser.

[0014] In one embodiment, the projection beam of the optical engine forms a third spot after passing through the top of the beam splitter, and the projection beam of the optical engine forms a fourth spot after passing through the forming tray surface of the printing device.

[0015] Adjusting the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine simultaneously coincides with both the first and second light spots, and saving the current angle of the optical engine as the calibration parameters of the optical engine, includes:

[0016] Adjust the horizontal position of the laser beam splitter to determine whether the third light spot coincides with the first light spot;

[0017] If the third light spot coincides with the first light spot, determine whether the fourth light spot coincides with the second light spot;

[0018] If the fourth light spot does not coincide with the second light spot, the angle of the optical engine is adjusted, and the step of determining whether the third light spot coincides with the first light spot is returned to be executed until the projection beam of the optical engine coincides with both the first light spot and the second light spot. The current angle of the optical engine is then saved as the calibration parameter of the optical engine.

[0019] In one embodiment, the method further includes:

[0020] If the fourth light spot coincides with the second light spot, the current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0021] In one embodiment, the method further includes:

[0022] If the third light spot does not coincide with the first light spot, the step of adjusting the horizontal position of the laser beam splitter is repeated until the third light spot coincides with the first light spot.

[0023] If the fourth light spot does not coincide with the second light spot, the step of adjusting the angle orientation of the optical engine is repeated until the fourth light spot coincides with the second light spot.

[0024] In one embodiment, the method of adjusting the angle orientation of the optical engine includes:

[0025] The lifting and lowering of the lifting components of the top wire adjustment platform where the optical engine is located is controlled, thereby controlling the angle orientation of the optical engine.

[0026] Secondly, this application provides a printing device, the printing device comprising:

[0027] The optical engine is located at the lower part of the main body of the printing device;

[0028] A molding tray is located on the upper part of the printing equipment body, and a resin tank is provided between the molding tray and the optical engine;

[0029] The resin tank is located at the top of the printing device and is used to hold photosensitive resin.

[0030] A beam splitter is disposed between the resin tank and the molding tray surface, and the beam splitter is horizontally disposed on the resin tank.

[0031] A laser module is disposed between the resin tank and the molding tray surface;

[0032] The laser beam splitter consists of the beam splitter prism and the laser module.

[0033] The controller includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described optomechanical calibration method steps for the printing device.

[0034] Thirdly, this application provides an optomechanical calibration device for a printing device, the device comprising:

[0035] The control module is used to control the laser module to emit target lasers toward the beam splitter.

[0036] An adjustment module is used to control the laser module in response to an angle adjustment operation of the laser module, so that the first reflected laser is concentric with the target laser, and the second reflected laser forms a first spot through the top of the beam splitter and a second spot through the forming tray surface of the printing device.

[0037] The calibration module is used to adjust the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots, and saves the current angle of the optical engine as the calibration parameters of the optical engine.

[0038] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0039] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method.

[0040] The aforementioned optomechanical calibration method, apparatus, computer equipment, storage medium, and computer program product for printing equipment, by placing a beam splitter and laser module between a resin tank and a forming tray surface, with the beam splitter horizontally positioned on the resin tank, and controlling the laser module to emit a target laser beam toward the beam splitter, the beam splitter splits the target laser beam into a single beam. The split target laser beam passes through the light-reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser beam. An angle adjustment operation on the laser module controls the laser module to make the first reflected laser beam in the horizontal direction concentric with the target laser beam, thereby obtaining a second reflected laser beam perpendicular to the forming tray surface, simulating the optimal orientation angle of the optomechanical system. At this point, by adjusting the laser beam splitter... The horizontal position and the angle of the optical engine are such that the first spot formed by the second reflected laser in the vertical direction passing through the top of the beam splitter and the second spot formed by the second laser passing through the molding tray surface of the printing equipment coincide with the projection beam, making the orientation of the optical engine perpendicular to the molding tray surface. This indicates that the projection surface of the optical engine is orthogonal to the molding tray surface. The angle of the optical engine at the point of coincidence is used as a calibration parameter. This method, on the one hand, eliminates the need for optical engine calibration when replacing the optical engine at the customer's site, reducing the workload of on-site technicians. On the other hand, by placing the beam splitter and laser module between the resin tank and the molding tray surface, and with the beam splitter horizontally set on the resin tank, visualized calibration is achieved, improving the vertical calibration accuracy of the optical engine. Attached Figure Description

[0041] Figure 1 This is a diagram illustrating the application environment of an optomechanical calibration method for a printing device in one embodiment.

[0042] Figure 2This is a flowchart illustrating the optomechanical calibration method for a printing device in one embodiment;

[0043] Figure 3 This is a schematic diagram of the optical path of a target laser in an ideal state in one embodiment.

[0044] Figure 4 This is a schematic diagram of the optical path of an actual target laser in one embodiment;

[0045] Figure 5 This is a flowchart illustrating a method for adjusting the concentricity of a target laser in one embodiment;

[0046] Figure 6 This is a flowchart illustrating the calibration method of an optomechanical system in one embodiment;

[0047] Figure 7 This is a flowchart illustrating a method for vertical adjustment of the optical path in a bottom projection 3D printing device in one embodiment.

[0048] Figure 8 This is a schematic diagram of the projected image of the optical engine in one embodiment;

[0049] Figure 9 This is a schematic diagram of a bottom projection DLP 3D printing device in one embodiment;

[0050] Figure 10 This is a structural block diagram of the optomechanical calibration device of a printing apparatus in one embodiment;

[0051] Figure 11 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0053] The optomechanical calibration method for printing equipment provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, the printing equipment includes: an optomechanical unit 102 disposed at the lower part of the printing equipment body 100, a resin tank 104 disposed at the upper part of the printing equipment body, a beam splitter 106, a laser module 108, and a forming tray surface 110. The beam splitter 106 and the laser module 108 are disposed between the resin tank 104 and the forming tray surface 110. The beam splitter 106 is horizontally disposed on the resin tank 104. The beam splitter 106 and the laser module 108 form a laser beam splitting device 112. The controller 10 is connected to the equipment body 100.

[0054] The controller 10 controls the laser module 108 to emit a target laser toward the beam splitter 106. The beam splitter 106 splits the target laser into beams. The beams of the target lasers pass through the light-reflecting surface of the resin tank 104 and the beam splitter 106 to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction. In response to the angle adjustment operation of the laser module 108, the controller 10 controls the laser module 108 to make the first reflected laser concentric with the target laser. The second reflected laser forms a first spot through the top of the beam splitter 106 and a second spot through the forming tray surface 110 of the printing equipment. The controller 10 adjusts the horizontal position of the laser beam splitter 112 and the angle of the optical engine 102 until the projected beam of the optical engine 102 coincides with the first spot and the second spot. The current angle of the optical engine 102 is saved as the calibration parameter of the optical engine 102.

[0055] The beam splitter 106 and the laser module 108 are detachably mounted on the resin tank. After the optical engine is calibrated, the beam splitter 106 and the laser module 108 can be disassembled.

[0056] In one embodiment, such as Figure 2 As shown, an optomechanical calibration method for a printing device is provided, which is applied to... Figure 1 Taking the controller in the example, the following steps are included:

[0057] S202, control the laser module to emit the target laser toward the beam splitter, wherein the beam splitter splits the target laser into beams of target laser. The beams of target laser pass through the light reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction.

[0058] The laser module can be a device capable of emitting laser light. The type of laser emitted by the laser module can be infrared light, ultraviolet light, or other types. The laser emitted by the laser module can be a laser with high circularity and high parallelism. Specifically, using a laser with high circularity and high parallelism as a reference light source can ensure the consistency of the emitted and returned light spots, reduce the positioning error of the light spot, and thus improve the calibration accuracy.

[0059] The laser emitted by the laser module is the target laser. This target laser is then split into two beams by a beam-splitting prism. Specifically, using the direction of the target laser as a reference, the beam-splitting prism produces a first split target laser and a second split target laser. The angle between the first split target laser and the target laser can be 90 degrees, while the angle between the second split target laser and the target laser can be 0 degrees. It should be noted that, typically, the angle between the first split target laser and the target laser is not 90 degrees. Fine-tuning the installation position and angle of the beam-splitting prism, as well as the angle of the laser module, is required to ensure that the angle between the first split target laser and the target laser is 90 degrees.

[0060] The target laser beam, after being split, passes through the light-reflecting surface of the resin tank and a beam-splitting prism to obtain a first reflected laser beam in the horizontal direction and a second reflected laser beam in the vertical direction. The first reflected laser beam in the horizontal direction can be parallel to the light-reflecting surface of the resin tank, while the second reflected laser beam in the vertical direction can be perpendicular to the light-reflecting surface of the resin tank. The resin tank can be made of highly transparent glass. To improve the light reflectivity of the first surface of the resin tank and simultaneously improve the light transmittance of the second surface, a plane mirror that reflects the laser beam and simultaneously projects the light emitted by the optical engine can be placed at the bottom of the resin tank.

[0061] Specifically, such as Figure 3 The schematic diagram of the optical path of the target laser in an ideal state shown includes: the target laser, the target laser after beam splitting, the first reflected laser in the horizontal direction, the second reflected laser in the vertical direction, the laser module, the beam splitter prism, and the resin tank.

[0062] In this process, the laser module emits a target laser towards the beam splitter, which splits the target laser into beams. The beams then pass through the light-reflecting surface of the resin tank or the plane mirror on the resin tank, and the beam splitter to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction.

[0063] S204, in response to the angle adjustment operation of the laser module, controls the laser module to make the first reflected laser concentric with the target laser, and the second reflected laser forms a first spot through the top of the beam splitter and forms a second spot through the forming tray surface of the printing equipment.

[0064] This includes the ability to adjust the horizontal and vertical angles of the laser module. This adjustment involves controlling the two-dimensional adjustment frame housing the laser module; by adjusting the knobs on the two-dimensional adjustment frame, the angle of the laser module can be adjusted. Specifically, for example... Figure 4The diagram shows the actual optical path of the target laser. In response to angle adjustment operations on the laser module, the two-dimensional adjustment frame housing the laser module is controlled, thereby controlling the adjustment of the laser module's horizontal and vertical angles. It should be noted that the two-dimensional adjustment frame is mounted on a parallel guide rail. Adjusting the horizontal angle of the laser module can be achieved by controlling the two-dimensional adjustment frame to adjust its angle in the horizontal direction, and adjusting the vertical angle of the laser module can be achieved by controlling the two-dimensional adjustment frame to adjust its angle in the vertical direction.

[0065] Among them, such as Figure 4 As shown, it also includes: a second reflected laser, which passes through a beam splitter and forms a first spot on the top of the beam splitter; the second reflected laser passes through the forming tray surface of the printing equipment and forms a second spot on the forming tray surface. By selecting a laser with high roundness and high parallelism, the consistency of the spot is ensured, and the calibration accuracy is improved.

[0066] Among them, such as Figure 3 The diagram shows the optical path of the target laser in an ideal state. Ideally, the first reflected laser and the target laser are concentric, meaning the spot of the first reflected laser falls within the emission aperture of the target laser. In this case, they can be considered concentric. However, in reality, due to the angle of the laser module, the first reflected laser and the target laser are not concentric. In this case, in response to the angle adjustment operation of the laser module, the laser module is controlled to make the first reflected laser concentric with the target laser. It should be noted that if the first reflected laser and the target laser are concentric, then the target laser after beam splitting can be considered to be perpendicularly incident on the resin tank. Consequently, the second reflected laser is perpendicular to the resin tank. The second reflected laser passes through the beam splitter and forms a first spot on the top of the beam splitter. The second reflected laser passes through the molding tray surface of the printing equipment and forms a second spot on the molding tray surface. Obtaining the first and second spots helps in subsequent processes to determine the overlap of the projected beam from the optical engine.

[0067] S206, Adjust the horizontal position of the laser beam splitter and the angle of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots, and save the current angle of the optical engine as the calibration parameters of the optical engine.

[0068] When the first reflected laser and the target laser are concentric, the two-dimensional adjustment frame for adjusting the angle of the laser module can be fixed in the angular direction. The significance of this step is to keep the second reflected laser perpendicular to the forming tray surface, thereby ensuring the calibration accuracy of the projection beam of the optomechanical system.

[0069] Specifically, such as Figure 4As shown, the horizontal position of the laser beam splitter can be adjusted by adjusting the horizontal position of the parallel guide rail on the resin tank where the beam splitter is located. Specifically, the adjustment can be done by sliding, and after sliding into place, it can be locked by the locking device on the resin tank.

[0070] The orientation of the optical engine can be adjusted by adjusting the tilt angle of the adjustment platform on which the optical engine is located. When the projection beam of the optical engine coincides with the first spot and the second spot at the same time, it is considered that the orientation of the optical engine is perpendicular to the forming tray surface. At this time, the error in the vertical direction of the printing equipment is eliminated, and the current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0071] In the aforementioned optomechanical calibration method for the printing equipment, a beam splitter and a laser module are positioned between the resin tank and the forming tray surface. The beam splitter is horizontally positioned on the resin tank. The laser module is controlled to emit a target laser beam toward the beam splitter. The beam splitter splits the target laser beam into a split target laser beam. The split target laser beam passes through the light-reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser beam. The angle of the laser module is adjusted to control the laser module so that the first reflected laser beam in the horizontal direction is concentric with the target laser beam. Thus, a second reflected laser beam perpendicular to the forming tray surface can be obtained, simulating the optimal orientation angle of the optomechanical system. At this time, by adjusting the horizontal position of the laser beam splitter and the orientation angle of the optomechanical system, the first light spot formed by the second reflected laser beam in the vertical direction passing through the top of the beam splitter and the second light spot formed by the forming tray surface of the printing equipment simultaneously coincide with the projected beam, making the orientation of the optomechanical system perpendicular to the forming tray surface. The orientation angle of the optomechanical system at the point of coincidence is used as the calibration parameter. This method, on the one hand, eliminates the need for optomechanical calibration, reducing the workload of technicians; on the other hand, by placing the beam splitter and laser module between the resin tank and the molding tray, and with the beam splitter horizontally positioned on the resin tank, it achieves visualized calibration, thus improving the vertical calibration accuracy of the optomechanical system.

[0072] In one embodiment, such as Figure 5 The flowchart shown illustrates the method for adjusting the concentricity of the target laser. In response to an angle adjustment operation on the laser module, the laser module is controlled to make the first reflected laser concentric with the target laser, including:

[0073] S502, adjust the angle of the laser module to obtain the reflected light spot of the first reflected laser.

[0074] The laser module's angle can be initially adjusted. This initial adjustment includes rotating the two-dimensional adjustment frame containing the laser module at a fixed angle in the horizontal or vertical direction to obtain the reflected light spot of the first reflected laser.

[0075] The reflected light spots of the first reflected laser include normal reflected spots and abnormal reflected spots. It should be noted that if the normal reflected spot falls within the emission aperture of the target laser, it indicates that the first reflected laser and the target laser are concentric. Specifically, the image of the light spot formed by the first reflected laser can be extracted using image recognition methods, and then processed such as grayscale conversion and binarization to obtain the image features of the first reflected laser spot. Based on these image features, the overlap between the light spot image and the emission aperture is judged. If the overlap is greater than a preset overlap threshold, the first reflected laser and the target laser are considered concentric, i.e., they coincide. Alternatively, the concentricity of the first reflected laser and the target laser can be determined manually by visual inspection.

[0076] Typically, contamination of the optical path of the target laser, such as the presence of extra reflective surfaces in the beam splitter, substandard flatness of the beam splitter, or the presence of other extra reflective surfaces, can lead to multiple abnormal reflected light spots around the target laser emission aperture.

[0077] S504, if the number of reflected light spots of the first reflected laser exceeds a preset value, then obtain the relevant reflecting surface of the target laser.

[0078] The relevant reflective surfaces of the target laser may include: the light-reflecting surface of the resin tank, the reflective surface of the beam splitter, and other reflective surfaces. Specifically, the first reflected laser and the target laser form multiple reflected light spots at the emission aperture position of the laser module through reflection from the relevant reflective surfaces.

[0079] S506, based on the light-reflecting surface of the beam splitter and resin tank, filters out the relevant reflective surfaces of the target laser to obtain abnormal reflective surfaces.

[0080] The method for eliminating relevant reflective surfaces of the target laser can be a tiered elimination process, including: A first-stage elimination method involves blocking the light-reflecting surfaces of the beam splitter and the resin tank. If a reflection point of the first reflected laser still exists at the emission aperture, the light-reflecting surfaces of the target laser path are blocked sequentially to obtain abnormal reflective surfaces. A second-stage elimination method involves removing at least one of the light-reflecting surfaces of the beam splitter and the resin tank after the abnormal reflective surfaces are obtained and blocked using the first-stage elimination method. If a reflection point of the first reflected laser still exists at the emission aperture, at least one of the light-reflecting surfaces of the beam splitter or the resin tank is considered for replacement. Alternatively, the light-reflecting surface of the resin tank can be left unreplaced, and a plane mirror can be placed on the light-reflecting surface of the resin tank to replace the resin tank's light-reflecting surface for calibration.

[0081] S508 blocks the abnormal reflective surface and readjusts the angle of the laser module to make the first reflected laser concentric with the target laser.

[0082] The horizontal position of the laser beam splitter can be adjusted by adjusting the horizontal position of the parallel guide rail on the resin tank where the beam splitter is located. Specifically, the adjustment can be done by sliding, and after sliding into place, it can be locked by the locking device on the resin tank.

[0083] The orientation of the optical engine can be adjusted by adjusting the tilt angle of the adjustment platform on which the optical engine is located. When the projection beam of the optical engine coincides with the first spot and the second spot at the same time, it is considered that the orientation of the optical engine is perpendicular to the forming tray surface. At this time, the error in the vertical direction of the printing equipment is eliminated, and the current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0084] In this embodiment, by filtering out the relevant reflective surfaces of the target laser to obtain abnormal reflective surfaces, blocking the abnormal reflective surfaces, and readjusting the angle and orientation of the laser module to make the first reflected laser concentric with the target laser, the accuracy of determining whether the first reflected laser and the target laser are concentric can be improved, thereby improving the calibration accuracy.

[0085] In one embodiment, the projection beam of the optical engine forms a third spot after passing through the top of the beam splitter prism, and the projection beam of the optical engine forms a fourth spot after passing through the forming tray surface of the printing equipment, such as... Figure 6 The flowchart illustrates the calibration method for the optical engine. It involves adjusting the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine simultaneously coincides with both the first and second light spots. The current angle of the optical engine is then saved as its calibration parameters, including:

[0086] S602, Adjust the horizontal position of the laser beam splitter.

[0087] The horizontal position of the laser beam splitter can be adjusted by adjusting the horizontal position of the parallel guide rail on the resin tank where the beam splitter is located.

[0088] S604, determine whether the third light spot overlaps with the first light spot. If so, execute S606; otherwise, return to S602.

[0089] The third spot is the spot formed by the projection beam of the optical engine passing through the top of the beam splitter. It can be determined whether the third spot coincides with the first spot by means of image recognition.

[0090] Specifically, the light spot image formed by the projected beam can be extracted using image recognition methods, and then processed such as grayscale conversion and binarization to obtain the features of the third light spot image and the first light spot image. Based on the light spot image features, the overlap between the third light spot image and the first light spot image is judged. If the overlap is greater than a preset overlap threshold, the third light spot image is considered to overlap with the first light spot image. Alternatively, the overlap between the third light spot image and the first light spot image can be judged manually by visual inspection. It should be noted that the first light spot image can be acquired by blocking the optical engine, and similarly, the third light spot image can be acquired by blocking the laser module.

[0091] If the overlap is less than the preset overlap threshold, the third spot image is considered not to overlap with the first spot image, and the process returns to S602.

[0092] S606: Determine whether the fourth light spot coincides with the second light spot. If so, save the current angle of the optical engine as the calibration parameter of the optical engine. Otherwise, execute S608.

[0093] The fourth spot is the spot formed by the projection beam of the optical engine passing through the surface of the molded tray. It can be determined whether the fourth spot coincides with the second spot by means of image recognition.

[0094] Specifically, the light spot image formed by the projected beam can be extracted using image recognition methods, and then processed such as grayscale conversion and binarization to obtain the features of the fourth and second light spot images. Based on the light spot image features, the overlap between the fourth and second light spot images is judged. If the overlap is greater than a preset overlap threshold, the fourth and second light spot images are considered to overlap. Alternatively, the overlap between the fourth and second light spot images can be determined manually by visual inspection. It should be noted that the second light spot image can be acquired by blocking the optical engine, and similarly, the fourth light spot image can be acquired by blocking the laser module.

[0095] S608, adjust the angle and orientation of the optical engine.

[0096] The orientation of the optical engine can be adjusted by adjusting the tilt angle of the adjustment platform on which the optical engine is located.

[0097] S610, determine whether the fourth light spot overlaps with the second light spot. If yes, return to S604; otherwise, return to S608.

[0098] If the fourth light spot does not coincide with the second light spot, return to S608 and adjust the angle of the optical engine multiple times until the fourth light spot coincides with the second light spot.

[0099] If the fourth light spot coincides with the second light spot, then return to determine whether the third light spot coincides with the first light spot. If they coincide, and the projection beam of the optical engine coincides with both the first and second light spots, then it is considered that the orientation of the optical engine is perpendicular to the forming tray surface, thus eliminating the error in the vertical direction of the printing equipment, and the current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0100] If the fourth spot coincides with the second spot, then return to determine whether the third spot coincides with the first spot. If they do not coincide, then the horizontal position of the laser beam splitter and the angle of the optical engine need to be adjusted multiple times so that the projected beam of the optical engine coincides with both the first and second spots. The current angle of the optical engine is then saved as the calibration parameters of the optical engine.

[0101] In this embodiment, the overlap between the third and fourth light spots related to the projection beam of the optical engine and the first and second light spots is determined. By repeatedly adjusting the horizontal position of the laser beam splitter and the angular orientation of the optical engine, the angle compression of the optical engine can be gradually achieved until the projection beam of the optical engine coincides with the first and second light spots simultaneously. The current angle of the optical engine is then saved as the calibration parameters of the optical engine.

[0102] In one embodiment, such as Figure 6 As shown, the optomechanical calibration method for the printing device also includes: S612, if the fourth spot coincides with the second spot, the current angle of the optomechanical system is saved as the calibration parameter of the optomechanical system.

[0103] When the third light spot coincides with the first light spot, it is determined whether the fourth light spot coincides with the second light spot. If the fourth light spot coincides with the second light spot, it means that the third light spot coincides with the first light spot and the fourth light spot coincides with the second light spot at the same time. At this time, the projection beam of the optical engine coincides with the first light spot and the second light spot at the same time. That is, the projection beam of the optical engine is perpendicular to the forming tray surface. The current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0104] Specifically, a preset number of times the spot overlap judgment is performed can be set. If the preset number of times the spot overlap judgment is performed is reached, the current angle of the optical engine is saved as the calibration parameter of the optical engine. Specifically, if the number of times the fourth spot and the second spot are judged to overlap is reached, for example, 3 to 5 times, the angle of the last adjustment of the optical engine is saved as the calibration parameter of the optical engine.

[0105] In this embodiment, by determining whether the fourth light spot coincides with the second light spot, the angle of the last adjustment of the optical engine is used as the calibration parameter of the optical engine. By determining and adjusting a preset number of times, the calibration accuracy is ensured while the calibration speed is improved.

[0106] In one embodiment, such as Figure 6As shown, the optomechanical calibration method for the printing device further includes: if the third spot does not coincide with the first spot, the step of adjusting the horizontal position of the laser beam splitter is repeated until the third spot coincides with the first spot.

[0107] If the fourth light spot does not coincide with the second light spot, repeat the step of adjusting the angle of the optical engine until the fourth light spot coincides with the second light spot.

[0108] The method for adjusting the horizontal position of the laser beam splitter includes: adjusting the horizontal position of the laser beam splitter by adjusting the parallel guide rail on which the beam splitter is located. Specifically, the horizontal position of the laser beam splitter on the resin tank can be adjusted by adjusting a preset length each time until the third spot coincides with the first spot.

[0109] The orientation of the optical engine can be adjusted by adjusting the tilt angle of the adjustment platform on which the optical engine is located.

[0110] Specifically, an image signal can be input to cause the projection beam from the optical engine to form a third and a fourth light spot on the top of the beam splitter and the surface of the forming plate. The size of the light spot can be determined based on the pixel diameter and projection accuracy of the optical engine. The pixel diameter can be determined by the projection accuracy of the optical engine and the diameters of the first and second light spots. The diameters of the first and second light spots can be measured in advance.

[0111] Compared to the traditional method of using the surface of the optical engine lens as a reflective reference surface for adjustment, using the projection center beam, i.e. the projection beam, as the actual object of adjustment is more conducive to improving vertical accuracy.

[0112] In this embodiment, by adjusting the orientation of the optomechanical angle and the horizontal position of the laser beam splitter, the spot positioning can be completed quickly, thereby improving calibration efficiency.

[0113] In one embodiment, adjusting the angle orientation of the optical engine includes: controlling the lifting and lowering of the lifting component of the set wire adjustment platform where the optical engine is located, thereby controlling the angle orientation of the optical engine.

[0114] The optical engine is mounted on a top screw adjustment platform, which is movably connected to the printing equipment body via a lifting component. Specifically, the lifting component can be a screw, lead screw, cylinder, or other similar parts. By adjusting the vertical position of the lifting component, the tilt angle of the top screw adjustment platform where the optical engine is located is adjusted, thereby adjusting the orientation of the optical engine.

[0115] Specifically, there can be multiple lifting components. Taking four lifting components as an example, the projection angle of the optical engine can be adjusted by fixing one corner to make the fourth light spot on the forming tray surface coincide with the second light spot.

[0116] The angle of the optical engine can also be adjusted directly. The method of adjustment is not limited here. Adjusting the angle of the optical engine directly is applicable after the initial adjustment of the lifting components is completed, and then the angle of the optical engine is adjusted.

[0117] In this embodiment, by adjusting the angle of the optical engine, the fourth spot of the projected beam on the molding tray surface is made to coincide with the second spot, which can improve the calibration accuracy.

[0118] 3D printing is a new type of rapid prototyping technology. Based on a three-dimensional digital model, it combines an automated molding system to create three-dimensional objects by layering materials. Photopolymerization is currently the most widely used type of 3D printing technology, producing models with excellent surface quality and high dimensional accuracy. Depending on the exposure method, it can be divided into SLA and DLP technologies. Compared to the laser point exposure scanning curing method of SLA technology, DLP technology can achieve full-area exposure in a single step, thus its printing efficiency far exceeds that of SLA. Furthermore, with the rapid development of DLP technology in recent years, ultra-high precision printing resolution can now be easily achieved, making DLP 3D printing equipment increasingly the first choice for more customers.

[0119] Currently, most DLP 3D printers use a bottom-projection optical engine (OMO) as the irradiation source, achieving light projection and curing at corresponding positions through external image signal processing. However, due to aberrations in the OMO lens design and the difficulty in ensuring perpendicularity to the forming surface during assembly, severe image distortion occurs, resulting in significant printing size errors. Therefore, it is usually necessary to calibrate the OMO's position to meet the required printing accuracy. Although optical calibration can calculate and adjust the pixel position coordinates of corresponding points based on the actual deviation of the projected points to eliminate the effects of image distortion, for distortions such as trapezoidal or pincushion distortions, excessive initial distortion can severely reduce the forming area. Before calibrating the OMO, it is necessary to ensure that the lens light path is projected perpendicularly as much as possible.

[0120] Furthermore, optical engines inevitably face the problem of power attenuation. This is related to both the inherent lifespan of the optical engine and optical path contamination. In particular, dust accumulation inside the optical engine lenses can cause abnormal power attenuation and even lead to a severe decline in image quality. Currently, for such abnormal situations, the entire equipment usually needs to be returned to the factory for repair, a time-consuming and labor-intensive process that is extremely inconvenient for customers.

[0121] In view of this, in one embodiment, such as Figure 7 As shown, a method for vertical adjustment of the optical path of a bottom projection 3D printing device is provided, including:

[0122] The printing device can be a DLP device, where DLP (Digital Light Processing) is a process in which image signals are digitally processed and then modulated with light to achieve image projection.

[0123] The first part, the vertical beam generation section, includes:

[0124] S702 controls the laser module to emit target lasers toward the beam splitter.

[0125] The beam splitter divides the target laser into beams, which then pass through the light-reflecting surface of the resin tank and the beam splitter to produce a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction.

[0126] S704, adjust the angle of the laser module to obtain the reflected light spot of the first reflected laser.

[0127] S706, if the number of reflected light spots of the first reflected laser exceeds a preset value, then obtain the relevant reflecting surface of the target laser.

[0128] S708, based on the light-reflecting surface of the beam splitter and resin tank, filters out the relevant reflective surfaces of the target laser to obtain abnormal reflective surfaces.

[0129] S710 blocks the abnormal reflective surface and readjusts the angle of the laser module to make the first reflected laser concentric with the target laser.

[0130] The second reflected laser forms a first spot through the top of the beam splitter prism and a second spot through the forming tray surface of the printing equipment.

[0131] Part Two, Calibration, includes:

[0132] The projection beam from the optical engine forms a third spot after passing through the top of the beam splitter prism, and the projection beam from the optical engine forms a fourth spot after passing through the forming tray surface of the printing equipment.

[0133] Among them, such as Figure 8 As shown, a schematic diagram of a projected image of an optical engine is provided. The optical engine can emit a projected image. The center of the projected image generally has a light spot with the same size as a laser, but it is not actually the same as a laser. This light spot extends along the direction of the optical engine to form a projected beam.

[0134] S712, adjust the horizontal position of the laser beam splitter.

[0135] S714: Determine whether the third light spot overlaps with the first light spot. If so, execute S716; otherwise, return to S712.

[0136] S716: Determine whether the fourth light spot coincides with the second light spot. If so, save the current angle of the optical engine as the calibration parameter of the optical engine. Otherwise, execute S718.

[0137] S718, adjusts the angle and orientation of the optical engine.

[0138] Among them, the lifting components of the top wire adjustment platform where the optical engine is located can be controlled to raise and lower, thereby controlling the angle and orientation of the optical engine.

[0139] S720: Determine whether the fourth light spot overlaps with the second light spot. If yes, return to S714; otherwise, return to S718.

[0140] S722, if the fourth spot coincides with the second spot, the current angle of the optical engine is saved as the calibration parameter of the optical engine.

[0141] In this embodiment, a beam splitter and a laser module are positioned between the resin tank and the molding tray surface. The beam splitter is horizontally positioned on the resin tank. The laser module is controlled to emit a target laser beam toward the beam splitter. The beam splitter splits the target laser beam into a split target laser beam. The split target laser beam passes through the light-reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser beam. The angle of the laser module is adjusted to make the first reflected laser beam in the horizontal direction concentric with the target laser beam. This results in a second reflected laser beam perpendicular to the molding tray surface, simulating the optimal orientation angle of the optical engine. At this time, by adjusting the horizontal position of the laser beam splitter and the orientation angle of the optical engine, the first light spot formed by the second reflected laser beam in the vertical direction passing through the top of the beam splitter and the second light spot formed by the molding tray surface of the printing device simultaneously coincide with the projected beam, making the orientation of the optical engine perpendicular to the molding tray surface. The orientation angle of the optical engine at the point of coincidence is used as a calibration parameter. This method, on the one hand, eliminates the need for on-site optical engine calibration when replacing the optical engine at the customer's location, reducing the workload of on-site technicians. On the other hand, by placing the beam splitter and laser module between the resin tank and the molding tray surface, with the beam splitter horizontally positioned on the resin tank, it achieves visualized calibration, improving the vertical calibration accuracy of the optical engine. This method also addresses the issue of poor projection repeatability caused by the optical engine installation method, thus enabling on-site calibration-free optical engine replacement and significantly reducing the overall maintenance cycle and cost. Furthermore, by increasing precise vertical positioning, it improves the projection repeatability of bottom-projection DLP 3D printing equipment, avoiding on-site optical calibration work due to poor positioning accuracy, achieving truly calibration-free rapid replacement. Simultaneously, this calibration solution overcomes the spatial limitations and light source characteristics differences of small DLP devices, enabling rapid high-precision vertical calibration even in limited spaces through compact modular design and simplified debugging processes.

[0142] In one embodiment, such as Figure 9 As shown, a printing device is provided, including: an optical engine disposed at the lower part of the printing device; a forming tray surface disposed at the upper part of the printing device; a resin tank disposed between the forming tray surface and the optical engine; the resin tank is disposed at the upper part of the printing device and is used to hold photosensitive resin; a beam splitter prism disposed between the resin tank and the forming tray surface, the beam splitter prism being horizontally disposed on the resin tank; a laser module disposed between the resin tank and the forming tray surface; a laser beam splitting device composed of the beam splitter prism and the laser module; and a controller including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the optical engine calibration method steps of the above-described printing device.

[0143] For example Figure 9 The diagram shows a bottom projection DLP 3D printing device. After the optical engine completes the calibration according to the optical engine calibration parameters, it projects towards the resin tank during 3D printing. The projection plane is the surface of the resin tank.

[0144] Specifically, the vertical position of the molding tray is controlled so that it moves from near the resin tank to away from the resin tank. During this process, the projection is irradiated onto the photosensitive resin in the resin tank in real time, and the photosensitive resin is cured, thereby gradually completing the 3D printing.

[0145] In this embodiment, a printing device is provided, which projects an optical engine toward a resin tank, and the photosensitive resin is cured on the surface of the molding tray under the action of the projection surface to achieve rapid three-dimensional printing.

[0146] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0147] Based on the same inventive concept, this application also provides an optomechanical calibration apparatus for implementing the optomechanical calibration method for the printing device described above. The solution provided by this apparatus is similar to the implementation described in the above method; therefore, the specific limitations in one or more embodiments of the optomechanical calibration apparatus for the printing device provided below can be found in the limitations of the optomechanical calibration method for the printing device described above, and will not be repeated here.

[0148] In one embodiment, such as Figure 10 As shown, an optomechanical calibration device for a printing device is provided, comprising: a control module 1002, an adjustment module 1004, and a calibration module 1006, wherein:

[0149] The control module 1002 is used to control the laser module to emit target laser towards the beam splitter.

[0150] The adjustment module 1004 is used to control the laser module in response to the angle adjustment operation of the laser module, so that the first reflected laser is concentric with the target laser, the second reflected laser forms a first spot through the top of the beam splitter, and forms a second spot through the forming tray surface of the printing equipment.

[0151] The calibration module 1006 is used to adjust the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots, and saves the current angle of the optical engine as the calibration parameters of the optical engine.

[0152] In one embodiment, the adjustment module 1004 is further configured to adjust the angle orientation of the laser module to obtain the reflected light spots of the first reflected laser. If the number of reflected light spots of the first reflected laser exceeds a preset value, the relevant reflecting surfaces of the target laser are obtained. Based on the light reflecting surfaces of the beam splitter and the resin tank, the relevant reflecting surfaces of the target laser are screened out to obtain abnormal reflecting surfaces. The abnormal reflecting surfaces are blocked, and the angle orientation of the laser module is readjusted to make the first reflected laser concentric with the target laser.

[0153] In one embodiment, the projection beam of the optical engine forms a third spot after passing through the top of the beam splitter prism, and the projection beam of the optical engine forms a fourth spot after passing through the forming tray surface of the printing device. The calibration module 1006 is also used to adjust the horizontal position of the laser beam splitter, determine whether the third spot coincides with the first spot, if the third spot coincides with the first spot, determine whether the fourth spot coincides with the second spot, if the fourth spot does not coincide with the second spot, adjust the angle of the optical engine, and return to the step of determining whether the third spot coincides with the first spot, until the projection beam of the optical engine coincides with both the first spot and the second spot, and save the current angle of the optical engine as the calibration parameters of the optical engine.

[0154] In one embodiment, the calibration module 1006 is further configured to save the current angle of the optical engine as the calibration parameter of the optical engine if the fourth light spot coincides with the second light spot.

[0155] In one embodiment, the calibration module 1006 is further configured to, if the third spot does not coincide with the first spot, repeatedly perform the step of adjusting the horizontal position of the laser beam splitter until the third spot coincides with the first spot; and if the fourth spot does not coincide with the second spot, repeatedly perform the step of adjusting the angle orientation of the optical engine until the fourth spot coincides with the second spot.

[0156] In one embodiment, the optomechanical calibration device of the printing equipment further includes an angle adjustment module for controlling the lifting and lowering of the lifting component of the set wire adjustment platform where the optomechanical machine is located, thereby controlling the angle orientation of the optomechanical machine.

[0157] Each module in the optomechanical calibration device of the aforementioned printing equipment can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the processor in the computer device, or stored in software within the memory of the computer device, so that the processor can call and execute the corresponding operations of each module.

[0158] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 11 As shown, this computer device includes a processor, memory, input / output interfaces (I / O), and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores calibration parameter data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements an optomechanical calibration method for a printing device.

[0159] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above method steps.

[0160] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above method steps.

[0161] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the above method steps.

[0162] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0163] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0164] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for optomechanical calibration of a printing device, characterized in that, The printing device includes: an optomechanical unit disposed at the lower part of the printing device body, a resin tank disposed at the upper part of the printing device body, a beam splitter, a laser module, and a forming tray surface, wherein the beam splitter and the laser module are disposed between the resin tank and the forming tray surface, the beam splitter is horizontally disposed on the resin tank, and the beam splitter and the laser module constitute a laser beam splitting device. The method includes: The laser module is controlled to emit a target laser toward the beam splitter; wherein the beam splitter splits the target laser into a split target laser; the split target laser passes through the light reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction. In response to the angle adjustment operation of the laser module, the laser module is controlled so that the first reflected laser is concentric with the target laser, and the second reflected laser forms a first spot through the top of the beam splitter and a second spot through the forming tray surface of the printing device. Adjust the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots simultaneously, and save the current angle of the optical engine as the calibration parameters of the optical engine.

2. The method according to claim 1, characterized in that, The step of controlling the laser module in response to an angle adjustment operation of the laser module, so that the first reflected laser is concentric with the target laser, includes: Adjust the angle of the laser module to obtain the reflected light spot of the first reflected laser; If the number of reflected light spots of the first reflected laser exceeds a preset value, then the relevant reflecting surface of the target laser is obtained; Based on the light-reflecting surfaces of the beam splitter and the resin tank, the relevant reflective surfaces of the target laser are screened out to obtain abnormal reflective surfaces; The abnormal reflective surface is blocked, and the angle of the laser module is readjusted to make the first reflected laser concentric with the target laser.

3. The method according to claim 1, characterized in that, The projection beam of the optical engine forms a third spot after passing through the top of the beam splitter prism, and the projection beam of the optical engine forms a fourth spot after passing through the forming tray surface of the printing equipment. Adjusting the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine simultaneously coincides with both the first and second light spots, and saving the current angle of the optical engine as the calibration parameters of the optical engine, includes: Adjust the horizontal position of the laser beam splitter to determine whether the third light spot coincides with the first light spot; If the third light spot coincides with the first light spot, determine whether the fourth light spot coincides with the second light spot; If the fourth light spot does not coincide with the second light spot, the angle of the optical engine is adjusted, and the step of determining whether the third light spot coincides with the first light spot is returned to be executed until the projection beam of the optical engine coincides with both the first light spot and the second light spot. The current angle of the optical engine is then saved as the calibration parameter of the optical engine.

4. The method according to claim 3, characterized in that, The method further includes: If the fourth light spot coincides with the second light spot, the current angle of the optical engine is saved as the calibration parameter of the optical engine.

5. The method according to claim 3, characterized in that, The method further includes: If the third light spot does not coincide with the first light spot, the step of adjusting the horizontal position of the laser beam splitter is repeated until the third light spot coincides with the first light spot. If the fourth light spot does not coincide with the second light spot, the step of adjusting the angle orientation of the optical engine is repeated until the fourth light spot coincides with the second light spot.

6. The method according to claim 1, characterized in that, The methods for adjusting the angle orientation of the optical engine include: The lifting and lowering of the lifting components of the top wire adjustment platform where the optical engine is located is controlled, thereby controlling the angle orientation of the optical engine.

7. A printing device, characterized in that, The printing device includes: The optical engine is located at the lower part of the main body of the printing device; A molding tray is located on the upper part of the printing equipment body, and a resin tank is provided between the molding tray and the optical engine; The resin tank is located at the top of the printing device and is used to hold photosensitive resin. A beam splitter is disposed between the resin tank and the molding tray surface, and the beam splitter is horizontally disposed on the resin tank. A laser module is disposed between the resin tank and the molding tray surface; The laser beam splitter consists of the beam splitter prism and the laser module. The controller includes a memory and a processor, the memory storing a computer program, which, when executed by the processor, implements the optomechanical calibration method steps of the printing apparatus according to any one of claims 1 to 6.

8. An optomechanical calibration device for a printing equipment, characterized in that, The device includes: A control module is used to control the laser module to emit target laser towards a beam splitter; wherein, the beam splitter splits the target laser into beams of target laser; the beams of target laser pass through the light-reflecting surface of the resin tank and the beam splitter to obtain a first reflected laser in the horizontal direction and a second reflected laser in the vertical direction. An adjustment module is used to control the laser module in response to an angle adjustment operation of the laser module, so that the first reflected laser is concentric with the target laser, and the second reflected laser forms a first spot through the top of the beam splitter and a second spot through the forming tray surface of the printing device. The calibration module is used to adjust the horizontal position of the laser beam splitter and the angular orientation of the optical engine until the projected beam of the optical engine coincides with both the first and second light spots, and saves the current angle of the optical engine as the calibration parameters of the optical engine.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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