Desktop-level photocuring printer resin stirring method and system and storage medium

Abstract

In order to overcome the defects in the prior art, the invention provides a desktop-level photocuring printer resin stirring method and system and a storage medium, and the method comprises the following steps: carrying out resin stirring treatment once at an interval of K or K. The stirring treatment comprises the following steps: step 101, controlling an optical assembly to finish printing of the layer and then pausing; 102, a vertical displacement mechanism is controlled to drive the forming base plate to move upwards in the vertical direction to the target height, and the upward stroke L is recorded; step 103, controlling the stirring mechanism to start and / or perform stirring motion for preset times in the resin tank; 104, the stirring mechanism is controlled to be closed and / or recovered to the initial position; 105, a vertical displacement mechanism is controlled to drive the forming base plate to move downwards in the vertical direction, and the movement stroke is L; and step 106, controlling the optical assembly to start and continue printing. According to the invention, automatic analysis and control of the stirring frequency of the resin liquid of the desktop-level photocuring printer are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and particularly relates to a resin stirring method and system for a desktop stereolithography printer and a storage medium. Background Art

[0002] A desktop stereolithography printer is a compact 3D printing device based on stereolithography technology (SLA / DLP / LCD), suitable for scenarios such as home, education, and creative design.

[0003] Stereolithography printers include downward printers and upward printers. Among them, the downward printer uses a top-down printing method and requires a large amount of resin. Therefore, the common desktop stereolithography printer is an upward printer that prints from bottom to top.

[0004] Due to the influence of environmental temperature, environmental humidity, and laser irradiation during the printing process, the resin liquid may form different degrees of curing states and different fluidities in different regions. For printed parts with simple structures and small sizes, since the printing time is short, resin liquid stirring can be performed once for each completed printing to make the resin liquid as a whole tend to be uniform after mixing different regions of the resin liquid. However, for printed parts with complex structures and large sizes, since the printing completion time is long, in order to ensure the yield rate of the printed parts, resin liquid stirring needs to be performed during the printing process to make the resin liquid uniform. At this time, too frequent resin liquid stirring will affect the printing efficiency, and long-term non-stirring will lead to uneven distribution of the resin liquid and uncontrollable defects in the printed parts. In the prior art, when to stir the resin liquid mainly depends on the user's experience, which makes it difficult to accurately control the stirring frequency. New users need to try printing many components before they can determine the appropriate stirring frequency. The main user groups of desktop stereolithography printers are individuals or small companies. Such a relatively large trial-and-error time and material cost are obviously not conducive to the popularization and use of desktop stereolithography printers. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a resin stirring method for a desktop stereolithography printer, specifically: perform a resin stirring process every K or K` time periods, and the stirring process includes the following steps:

[0006] Step 101: Control the optical component to pause after completing the printing of this layer;

[0007] Step 102: Control the vertical displacement mechanism to drive the forming substrate to move upward along the vertical direction to the target height, and record the upward travel L;

[0008] Step 103: Control the stirring mechanism to start and / or perform a preset number of stirring movements in the resin tank;

[0009] Step 104 controls the stirring mechanism to close and / or return to the initial position;

[0010] Step 105 controls the vertical displacement mechanism to drive the forming substrate to move downward in the vertical direction, and the movement stroke is L;

[0011] Step 106 controls the optical component to start and continue printing.

[0012] Optionally, the interval times K and K` are preset stirring interval times;

[0013] Optionally, the interval times K and K` are obtained through the following steps:

[0014] Step 201 obtains the resin type A, the resin input amount B, the current ambient temperature T, and the current ambient humidity H;

[0015] Step 202 obtains the stirring treatment interval time K0 corresponding to the standard temperature T0 and the standard ambient humidity H0 from the database based on the resin type A and the resin input amount B;

[0016] Step 203 calculates the current temperature difference TC = T - T0, the ambient humidity difference HC = H - H0, and obtains the stirring time interval adjustment parameter D based on the following formula:

[0017]

[0018] In the formula, e is the natural constant, W is the temperature adjustment coefficient, and Q is the humidity adjustment coefficient; the temperature adjustment coefficient W and the humidity adjustment coefficient Q are obtained through pre-experiments according to different resin types;

[0019] Step 204 determines the stirring treatment interval time K under the conditions of the current ambient temperature T and the current ambient humidity H by calculating K = D * K0, and performs resin stirring treatment once every K time periods;

[0020] Step 205 performs steps 101 to 104 once when printing starts. From the start of printing to the end of printing, the current ambient temperature T and the current ambient humidity H are obtained once every preset value time period, and steps 103 to 104 are repeated once, and the newly obtained stirring treatment interval time K` is used as the interval time for the next stirring treatment.

[0021] Further, after obtaining the infrared image data of the printing resin, supplementary stirring treatment is performed. The supplementary stirring treatment includes the following steps:

[0022] Step 301 converts the infrared image data into a spatial infrared radiation distribution map;

[0023] Step 302-A determines the spatial temperature distribution of each region based on the spatial infrared radiation distribution map. If the temperature difference between the highest temperature and the lowest temperature in the resin region exceeds the preset first resin temperature difference threshold, a resin stirring process is performed once, and the interval time for the next resin stirring process is reset based on the stirring process interval time K;

[0024] Step 302-B: Convert the spatial infrared radiation distribution map into a spatial temperature grid distribution map according to the preset grid lines. If the temperature difference between the highest temperature and the lowest temperature in the resin region within a preset number of adjacent grids exceeds the preset second resin temperature difference threshold, a resin stirring process is performed once, and the interval time for the next resin stirring process is reset based on the stirring process interval time K;

[0025] Either Step 302-A or Step 302-B is selected for execution or both are executed simultaneously.

[0026] Further, after obtaining the infrared image data of the printing resin, heating control analysis is performed. The heating control analysis includes the following steps:

[0027] Step 401 converts the infrared image data into a spatial infrared radiation distribution map;

[0028] Step 402 determines the spatial temperature distribution of each region based on the spatial infrared radiation distribution map. When the average temperature of the resin region is lower than the preset temperature threshold, the heating component is controlled to start;

[0029] Step 403 repeats Step 402 until the average temperature of the resin region is higher than the preset post-heating temperature threshold, and then the heating component is controlled to turn off, and the interval time for the next resin stirring process is reset based on the stirring process interval time K; the preset post-heating temperature threshold is greater than or equal to the preset temperature threshold.

[0030] Further, when performing Step 402, a resin stirring process is performed while controlling the heating component to start;

[0031] When performing Step 403, while controlling the heating component to turn off, the stirring mechanism is controlled to return to the initial position.

[0032] Further, the method for determining the resin region includes: taking the covered area of the forming substrate in the resin tank as the first exclusion area. At this time, the part of the area inside the resin tank excluding the first exclusion area is the resin region.

[0033] Further, the first exclusion area is reduced proportionally in the opposite direction of the infrared image acquisition component based on the angle of the infrared image acquisition component facing the resin as the height of the displacement part of the vertical displacement mechanism increases.

[0034] Further, the area of the printing surface of the optical component located in the resin tank is used as the second exclusion area. At this time, the exclusion area is the cumulative area of the first exclusion area and the second exclusion area, and the part of the area in the resin tank excluding the exclusion area is the resin area.

[0035] Further, the target height described in step 102 is: a preset fixed value of height;

[0036] Further, the target height described in step 102 is obtained by the following method: the target height U = U0 + Ud + Uk, where U0 is the height of the stirring mechanism, Ud is the height that the vertical displacement mechanism moves upward during the printing process, and Uk is an adjustment value greater than or equal to 0.

[0037] The second object of the present invention is to provide a resin stirring control system for a desktop light-curing printer. The control system includes a processor, and the processor executes the steps in the above-mentioned resin stirring method for the desktop light-curing printer.

[0038] The third object of the present invention is to provide a storage medium that can be read by a computer to implement the steps in the above-mentioned resin stirring method for the desktop light-curing printer.

[0039] The advantages of the present invention are as follows: The present invention realizes the automatic analysis and control of the stirring frequency of the resin liquid of the desktop light-curing printer, thereby significantly reducing the time cost and material cost of new users' trial and error. Description of the Drawings

[0040] Figure 1 Shown is a schematic diagram of the overall structure of the desktop light-curing printer according to an example of the present invention;

[0041] Figure 2 Shown is a schematic diagram of the structure of the printing component part of the desktop light-curing printer according to an example of the present invention. Detailed Description of the Invention

[0042] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0043] Please note that the "above", "below", "left", "right", "top", "upper part", "bottom end", "bottom" and other terms used in the present invention to describe the positional relationship do not represent the absolute positional relationship between each module / component / assembly / part / element, but the relative positional relationship between each module / component / assembly / part / element.

[0044] For a clearer description of the technical solution of the present invention, the present invention is described by way of example based on Figure 1 the desktop light-curing printer shown.Figure 1 The desktop stereolithography printer shown includes: a printing component 2 and a protection component 1. The protection component 1 includes a protection housing 102, a protection cover 103, and a protection isolation panel 101, and protects the printing component 2. The protection cover 103 can rotate relative to the protection housing 102 to expose or enclose the printing part of the printing component 2, facilitating the user's printing operation.

[0045] As Figure 2 shown, the printing component 2 includes: a printing platform 201 and a control system. Above the printing platform 201, there is a resin tank 202, and below the corresponding position of the tank body of the resin tank 202 on the printing platform 201, there is an optical component 203. On the printing platform 201, there is a doctor blade mechanism 207 that moves back and forth along the inside of the resin tank 202, and a vertical displacement mechanism 206 is provided vertically outside the resin tank 202. The vertical displacement mechanism 206 drives the pick-up mechanism 205 and the forming substrate 204 to move back and forth vertically, and the forming substrate 204 can be inserted into the tank body of the resin tank 202 and cover the working surface of the optical component 203.

[0046] The present invention exemplarily provides a resin stirring method for a desktop stereolithography printer, specifically: performing a resin stirring process every K or K` time period. The stirring process includes the following steps:

[0047] Step 101: Control the optical component 203 to pause after completing the printing of this layer.

[0048] Step 102: Control the vertical displacement mechanism 206 to drive the forming substrate 204 to move upward vertically to the target height and record the upward travel L.

[0049] Step 103: Control the doctor blade mechanism 207 to perform a preset number of back-and-forth movements in the resin tank; based on the desktop stereolithography printer of the present invention example, the back-and-forth movement of the doctor blade mechanism 207 in the resin tank can stir the resin liquid in the resin tank. For other desktop stereolithography printers, this step is to control the corresponding stirring mechanism to start or perform a back-and-forth movement in the resin tank to stir the resin liquid in the resin tank.

[0050] Step 104: Control the doctor blade mechanism 207 to return to the initial position; based on the desktop stereolithography printer of the present invention example, this step is to control the doctor blade mechanism 207 to return to the initial position. For other desktop stereolithography printers, this step is to control the corresponding stirring mechanism to close or return to the initial position.

[0051] Step 105: Control the vertical displacement mechanism 206 to drive the forming substrate 204 to move downward vertically, and the travel is L.

[0052] Step 106 controls the optical component 203 to start and continue printing.

[0053] When printing a larger or more complex component, due to the long printing time, resin stirring needs to be performed at intervals during the printing process. On the one hand, it makes the resin liquids in each area mix with each other to improve the uniformity of the resin liquid. On the other hand, it mixes the resin liquids in different temperature zones to improve the uniformity of temperature. Since there are many types of resins and the printing environment is complex, existing desktop stereolithography printers usually do not set the resin stirring interval time. That is, it is mainly up to the user to judge whether resin stirring is needed, and the uniformity of the resin and the uniformity of the resin temperature will affect the printing effect. This results in the defects of the components obtained by printing with existing desktop stereolithography printers being mainly limited by the user's operation experience. Although frequent resin stirring can overcome the above problems, it seriously reduces the printing efficiency.

[0054] Through technical improvement, the present invention introduces control parameters K or K', so that the printer can perform an automatic resin liquid stirring action every K or K' time periods.

[0055] The present invention exemplarily provides a kind of the interval times K and K', which are: preset stirring interval time. Using a fixed value consumes less computing resources of the processor, but has relatively poor adaptability and is suitable for use in batch printing.

[0056] The present invention exemplarily provides a kind of the interval times K and K', which are obtained through the following steps:

[0057] Step 201 obtains the resin type A, the resin input amount B, the current ambient temperature T, and the current ambient humidity H;

[0058] Step 202 obtains the stirring treatment interval time K0 corresponding to the standard temperature T0 and the standard ambient humidity H0 from the database based on the resin type A and the resin input amount B;

[0059] Step 203 calculates the current temperature difference TC = T - T0, the ambient humidity difference HC = H - H0, and obtains the stirring time interval adjustment parameter D based on the following formula:

[0060]

[0061] In the formula, e is the natural constant, W is the temperature adjustment coefficient, and Q is the humidity adjustment coefficient; the temperature adjustment coefficient W and the humidity adjustment coefficient Q are obtained through pre-experiments according to different resin types;

[0062] Step 204 determines the stirring treatment interval time K under the current ambient temperature T and the current ambient humidity H by calculating K = D * K0, and performs a resin stirring treatment every K time periods;

[0063] In step 205, steps 101 to 104 are performed once at the start of printing. From the start of printing to the end of printing, the current ambient temperature T and the current ambient humidity H are obtained once every preset time period, and steps 103 to 104 are repeated. The newly obtained stirring treatment interval time K` is used as the interval time for the next stirring treatment.

[0064] This method introduces the main factors that affect the resin curing speed and temperature distribution, such as resin type, resin addition amount, ambient temperature, and ambient humidity, and constructs a unique analysis method for the stirring interval time. Thus, a reasonable stirring frequency interval time can be obtained based on the analysis method during printing to achieve automatic stirring of the resin liquid. This can ensure the printing efficiency while keeping the resin liquid uniformly distributed, significantly improving the yield of the printed components.

[0065] Based on a desktop stereolithography printer as shown in Figure 1 Figure, on the basis of additionally installing a dual-light monitoring camera 3, the present invention exemplarily provides a method for performing supplementary stirring treatment after obtaining infrared image data of the printing resin. The supplementary stirring treatment includes the following steps:

[0066] Step 301: Convert the infrared image data into a spatial infrared radiation distribution map;

[0067] Step 302-A: Based on the spatial infrared radiation distribution map, judge the spatial temperature distribution of each region. If the temperature difference between the highest temperature and the lowest temperature in the resin region exceeds the preset first resin temperature difference threshold, perform a resin stirring treatment once, and reset the interval time for the next resin stirring treatment based on the stirring treatment interval time K;

[0068] Step 302-B: According to the preset grid lines, convert the spatial infrared radiation distribution map into a spatial temperature grid distribution map. If the temperature difference between the highest temperature and the lowest temperature in the resin region within a preset number of adjacent grids exceeds the preset second resin temperature difference threshold, perform a resin stirring treatment once, and reset the interval time for the next resin stirring treatment based on the stirring treatment interval time K;

[0069] Either step 302-A or step 302-B is performed alternatively or simultaneously.

[0070] The resin temperature is an important factor affecting the yield of printed components. In the prior art, a temperature sensor is generally used to detect the temperature at a fixed point of the resin liquid to determine whether the resin liquid temperature meets the requirements and whether heating treatment is required. However, the heat transfer ability of the resin liquid is generally poor, and it is difficult to accurately obtain the overall temperature of the resin liquid by the fixed-point temperature measurement method, which easily causes problems such as untimely heating or overheating, thus affecting the yield of printing.

[0071] The present invention uses an infrared area temperature measurement device to measure the temperature of the resin liquid area in a regional manner, obtains the overall temperature distribution of the resin liquid area, and determines whether to start the stirring action to balance the resin liquid temperature based on the overall temperature distribution of the resin liquid area, which can effectively maintain the balance of the resin liquid temperature and avoid excessive regional temperature differences in the resin liquid temperature.

[0072] The present invention exemplarily provides a method for heating control analysis after obtaining infrared image data of printing resin. The heating control analysis includes the following steps:

[0073] Step 401 converts the infrared image data into a spatial infrared radiation distribution map;

[0074] Step 402 determines the spatial temperature distribution of each area based on the spatial infrared radiation distribution map. When the average temperature of the resin area is lower than the preset temperature threshold, the heating component is controlled to start;

[0075] Step 403 repeats Step 402 until the average temperature of the resin area is higher than the preset post-heating temperature threshold, and then controls the heating component to turn off and resets the interval time for the next resin stirring process based on the stirring processing interval time K; the preset post-heating temperature threshold is greater than or equal to the preset temperature threshold.

[0076] The present invention determines whether to perform heating treatment on the resin liquid based on the temperature distribution of the resin liquid area. Compared with the existing fixed-point temperature measurement technology, the regional temperature measurement and judgment method of the present invention effectively reduces the problems of untimely heating or overheating existing in the fixed-point temperature measurement technology.

[0077] When the present invention exemplarily performs Step 402, the resin stirring process is carried out while controlling the heating component to start; when performing Step 403, the stirring mechanism is controlled to return to the initial position while controlling the heating component to turn off.

[0078] Performing the stirring process while heating can further make the resin liquid heat more evenly.

[0079] The present invention exemplarily provides a method for determining the resin area, including: taking the covered area of the forming substrate 204 in the resin tank 202 as the first exclusion area. At this time, the part of the area inside the resin tank 202 excluding the first exclusion area is the resin area.

[0080] When the dual - light monitoring camera 3 performs regional infrared monitoring on the resin tank 202, the dual - light monitoring camera 3 will simultaneously detect the area of the resin tank 202 blocked by the forming substrate 204. Since the temperature of the forming substrate 204 is generally significantly different from the resin liquid temperature, this easily leads to a significant increase in the possibility of misjudgment when the temperature of the forming substrate 204 is included in the judgment. Therefore, it is necessary to exclude the area covered by the forming substrate 204 in the resin tank 202 to avoid misjudgment of the resin temperature.

[0081] The present invention exemplarily provides a method for determining the resin area, which further includes, on the basis of the above - mentioned method for determining the resin area: the first exclusion area decreases proportionally in the opposite direction of the dual - light monitoring camera 3 based on the angle of the dual - light monitoring camera 3 facing the resin as the height of the displacement part of the vertical displacement mechanism 206 increases.

[0082] Since the dual - light monitoring camera 3 generally faces the resin tank 202 at a certain angle, as the forming substrate 204 moves upward, the area of the resin tank 202 blocked by the forming substrate 204 in the image of the dual - light monitoring camera 3 decreases proportionally in the opposite direction of the dual - light monitoring camera 3. Therefore, the present invention adaptively adjusts the first exclusion area to include as much resin liquid temperature as possible in the judgment to improve the judgment accuracy.

[0083] The present invention exemplarily provides a method for determining the resin area, which further includes, on the basis of the above - mentioned method for determining the resin area: taking the area where the printing surface of the optical component 203 is located in the resin tank 202 as the second exclusion area. At this time, the exclusion area is the cumulative area of the first exclusion area and the second exclusion area, and the area of the resin tank 202 excluding the exclusion area is the resin area.

[0084] When the forming substrate 204 rises to a certain height, the first exclusion area will shrink to less than the printing surface where the optical component 203 performs printing. When the resin liquid is cured under the action of the optical component 203, its temperature is significantly different from the remaining uncured resin. Therefore, the present invention takes the area where the printing surface of the optical component 203 is located in the resin tank 202 as the second exclusion area, and accumulatively excludes the first exclusion area and the second exclusion area to avoid misjudgment caused by reasonable temperature differences during the curing process.

[0085] The present invention exemplarily provides that the target height in step 102 is: a preset height value. This method is a fixed - height method, which requires less computational effort. And by setting a relatively high preset height value, it can ensure that the scraper stirring movement will not touch or damage the printed semi - finished product.

[0086] Exemplarily, the present invention provides a target height described in step 102, which is obtained by the following method: target height U = U0 + Ud + Uk, where U0 is the height of the stirring mechanism, Ud is the height by which the vertical displacement mechanism moves upward during the printing process, and Uk is an adjustment value greater than or equal to 0.

[0087] This method can adjust the target height U in real time through simple calculations, leaving enough clearance compared to the squeegee, so as to ensure that the squeegee will not touch or damage the printed semi-finished product during the stirring movement, and at the same time, it can reduce unnecessary up and down strokes, thereby improving the printing efficiency.

[0088] Exemplarily, the present invention provides a resin stirring control system for a desktop light-curing printer. The control system includes a processor, and the processor executes the steps in the above-mentioned resin stirring method for a desktop light-curing printer.

[0089] Exemplarily, the present invention provides a storage medium that can be read by a computer to implement the steps in the above-mentioned resin stirring method for a desktop light-curing printer.

[0090] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A resin stirring method for a desktop stereolithography printer, characterized in that, Perform resin stirring treatment once every K or K` time periods. The stirring treatment includes the following steps: Step 101: Control the optical component to pause after completing the printing of this layer; Step 102: Control the vertical displacement mechanism to drive the forming substrate to move upward along the vertical direction to the target height, and record the upward travel L; Step 103: Control the stirring mechanism to start and / or perform a preset number of stirring motions in the resin tank; Step 104: Control the stirring mechanism to close and / or return to the initial position; Step 105: Control the vertical displacement mechanism to drive the forming substrate to move downward along the vertical direction, and the travel is L; Step 106: Control the optical component to start and continue printing.

2. The resin stirring method of the desktop light-curing printer according to claim 1, characterized in that, The interval times K and K` are preset stirring interval times; Or, The interval times K and K` are obtained through the following steps: Step 201: Obtain the resin type A, resin input amount B, current ambient temperature T, and current ambient humidity H; Step 202: Based on the resin type A and resin input amount B, obtain the stirring treatment interval time K0 corresponding to the standard temperature T0 and standard ambient humidity H0 from the database; Step 203: Calculate the current temperature difference TC = T - T0 and the ambient humidity difference HC = H - H0, and obtain the stirring time interval adjustment parameter D based on the following formula: In the formula, e is the natural constant, W is the temperature adjustment coefficient, and Q is the humidity adjustment coefficient; the temperature adjustment coefficient W and humidity adjustment coefficient Q are obtained through pre-experiments according to different resin types; Step 204: Determine the stirring treatment interval time K under the current ambient temperature T and current ambient humidity H by calculating K = D * K0, and perform resin stirring treatment once every K time periods; Step 205: Perform steps 101 to 104 once at the start of printing. From the start of printing to the end of printing, obtain the current ambient temperature T and current ambient humidity H once every preset value time period and repeat steps 103 to 104 once, and use the newly obtained stirring treatment interval time K` as the interval time for the next stirring treatment.

3. The resin stirring method of the desktop stereolithography printer according to claim 1, wherein Perform supplementary stirring treatment after obtaining the infrared image data of the printing resin. The supplementary stirring treatment includes the following steps: Step 301: Convert the infrared image data into a spatial infrared radiation distribution map; Step 302-A: Based on the spatial infrared radiation distribution map, judge the spatial temperature distribution of each region. If the temperature difference between the highest temperature and the lowest temperature in the resin region exceeds the preset first resin temperature difference threshold, perform a resin stirring treatment once, and reset the interval time for the next resin stirring treatment based on the stirring treatment interval time K; Step 302-B: Convert the spatial infrared radiation distribution map into a spatial temperature grid distribution map according to the preset grid lines. If the temperature difference between the highest temperature and the lowest temperature in the resin region in adjacent preset numbers of grids exceeds the preset second resin temperature difference threshold, perform a resin stirring treatment once, and reset the interval time for the next resin stirring treatment based on the stirring treatment interval time K; The above steps 302-A and 302-B are either performed alternatively or simultaneously.

4. The resin stirring method of the desktop light-curing printer according to claim 1, wherein Perform heating control analysis after obtaining the infrared image data of the printing resin. The heating control analysis includes the following steps: Step 401 converts the infrared image data into a spatial infrared radiation distribution map; Step 402 determines the spatial temperature distribution of each region based on the spatial infrared radiation distribution map. When the average temperature of the resin region is lower than the preset temperature threshold, the heating component is controlled to start; Step 403 repeats Step 402 until the average temperature of the resin region is higher than the preset post-heating temperature threshold. Then, the heating component is controlled to turn off, and the interval time for the next resin stirring process is reset based on the stirring processing interval time K; the preset post-heating temperature threshold is greater than or equal to the preset temperature threshold.

5. The resin stirring method of the desktop stereolithography printer according to claim 4, wherein When performing Step 402, the resin stirring process is carried out while the heating component is controlled to start; When performing Step 403, the stirring mechanism is controlled to return to the initial position while the heating component is controlled to turn off.

6. The resin stirring method of the desktop stereolithography printer according to any one of claims 3 or 4, characterized in that, The method for determining the resin region includes: taking the covered area of the forming substrate in the resin tank as the first exclusion area. At this time, the part of the area in the resin tank excluding the first exclusion area is the resin region.

7. The resin stirring method of the desktop stereolithography printer according to claim 6, characterized in that, The first exclusion area is proportionally reduced in the opposite direction of the infrared image acquisition component based on the angle of the infrared image acquisition component facing the resin as the height of the displacement part of the vertical displacement mechanism increases.

8. The resin stirring method of the desktop stereolithography printer according to claim 6, characterized in that Taking the area where the printing surface of the optical component is located in the resin tank as the second exclusion area. At this time, the exclusion area is the cumulative area of the first exclusion area and the second exclusion area, and the part of the area in the resin tank excluding the exclusion area is the resin region.

9. The resin stirring method of the desktop light-curing printer according to claim 1, characterized in that, The target height in Step 102 is: A preset height value; Or, The target height U = U0 + Ud + Uk, where U0 is the height of the stirring mechanism, Ud is the height by which the vertical displacement mechanism moves up during the printing process, and Uk is an adjustment value greater than or equal to 0.

10. A resin stirring control system for a desktop stereolithography printer, characterized in that, It includes a processor, and the processor executes the steps in the resin stirring method of the desktop light-curing printer according to any one of claims 1-9.

11. A storage medium, characterized in that, This storage medium can be read by a computer to implement the steps in the resin stirring method of the desktop light-curing printer according to any one of claims 1-9.

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