CN116423843A - Control method of 3D printer, storage medium and 3D printer - Google Patents

Control method of 3D printer, storage medium and 3D printer Download PDF

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Publication number
CN116423843A
CN116423843A CN202310390330.5A CN202310390330A CN116423843A CN 116423843 A CN116423843 A CN 116423843A CN 202310390330 A CN202310390330 A CN 202310390330A CN 116423843 A CN116423843 A CN 116423843A
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value
model
height
layer
release
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陈建刚
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Shenzhen Anycubic Technology Co Ltd
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Shenzhen Anycubic Technology Co Ltd
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Priority to CN202310390330.5A priority Critical patent/CN116423843A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention discloses a control method of a 3D printer, a storage medium and the 3D printer, and relates to the technical field of 3D printing. The method comprises the following steps: acquiring the model area of the current printing layer and the model area of the last printing layer of the model, and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value; and if the area change difference value is greater than or equal to the area change threshold value, acquiring a release height adaptation value, and setting the release height adaptation value as the release height of the current printing layer of the model. The method can improve the model printing speed, reduce the model printing time and improve the printing efficiency on the basis of guaranteeing the model printing effect and the model printing success rate.

Description

Control method of 3D printer, storage medium and 3D printer
Technical Field
The invention relates to the technical field of 3D printing, in particular to a control method of a 3D printer, a storage medium and the 3D printer.
Background
The photo-curing forming technology is one of the earliest 3D printing forming technologies and is also a 3D printing technology which is mature at present. The basic principle of the technology is that the shape of a three-dimensional target part is divided into a plurality of plane layers by using accumulation molding of materials, and a light beam with a certain wavelength is used for scanning liquid photosensitive resin, so that the scanned part of each layer of liquid photosensitive resin is solidified and molded, the part which is not irradiated by the light beam is still in a liquid state, and finally all layers are accumulated to form the required target part. The photo-curing 3D printer has high printing precision, and can reach the micron level, so the development trend is good.
At present, in order to separate a model from a release film in the process of printing the model, a photo-curing 3D printer is usually realized by lifting a printing platform from resin by a certain height, which is also called release height, and in the process of printing the model, the release height is usually set to be a fixed higher value, so that the model can be ensured to be normally released from the release film, and the printing effect and success rate are ensured. However, setting the release height to a relatively high value results in a relatively slow speed of model printing, a long time of model printing, and low printing efficiency.
Disclosure of Invention
In view of this, the application provides a control method of a 3D printer, a storage medium and a 3D printer, and mainly aims to solve the technical problems of slow model printing speed, long printing time and low printing efficiency.
According to a first aspect of the present invention, there is provided a control method of a 3D printer, the method comprising:
acquiring the model area of the current printing layer and the model area of the last printing layer of the model, and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value;
And if the area change difference value is greater than or equal to the area change threshold value, acquiring a release height adaptation value, and setting the release height adaptation value as the release height of the current printing layer of the model.
Wherein the method further comprises: if the area change difference value is smaller than the area change threshold value, the preset first release height value is respectively set as the release height and the release height adaptation value of the current printing layer of the model.
Wherein the method further comprises: and controlling the motor to run in response to the completion of printing of the current printing layer of the model, so that the printing platform is lifted according to the release height of the current printing layer of the model.
Wherein the method further comprises: collecting a tension detection value in the running process of the motor, and judging whether the tension detection value is smaller than or equal to a preset first tension value; when the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adapting height of the current printing layer of the model.
Wherein the method further comprises: acquiring the adaptation height of at least one layer of continuous model; and determining a release height adaptation value according to the adaptation height of the continuous at least one layer of model.
Wherein obtaining the adapted height of the continuous at least one layer of model comprises: saving the adapted height of the current print layer of the model in a storage space; judging whether the number of the adaptive heights stored in the storage space is larger than or equal to a preset number value; and if the number of the adaptation heights stored in the storage space is greater than or equal to a preset number value, acquiring the adaptation heights of at least one layer of continuous models in the storage space.
Wherein, according to the adaptation height of continuous at least one layer model, confirm from type altitude adaptation value, include: the maximum value of the adaptation heights of the continuous at least one layer of models is set as the release height adaptation value.
Wherein the method further comprises: after the lifting height of the printing platform reaches the release height of the current printing layer of the model, judging whether the current tension detection value is larger than a preset first tension value or not; if the current tension detection value is larger than the first tension value, setting a release height compensation value; and controlling the motor to run so that the lifting height of the printing platform is the same as the release height compensation value.
Wherein the method further comprises: judging whether the sum of the release height of the current printing layer of the model and the release height compensation value is larger than a first release height value or not; and if the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value, sending out alarm prompt information.
Wherein the method further comprises: if the area change difference value is smaller than the area change threshold value, respectively setting a preset first release height value as a release height and a release height adaptation value of the current printing layer of the model, wherein the area change threshold value is larger than or equal to zero;
the first release height value is larger than or equal to the release height adaptation value; controlling the motor to run in response to the completion of printing of the current printing layer of the model so that the lifting height of the printing platform is the same as the release height of the current printing layer of the model; collecting a tension detection value in the running process of the motor, and judging whether the tension detection value is smaller than or equal to a preset first tension value, wherein the first tension value is the tension detection value when the tension sensor is not stressed, or the model is separated from the experience value of the release film, or the minimum tension value when the model is released; when the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adaptive height of the current printing layer of the model; acquiring the adaptation height of at least one layer of continuous model; and determining a release height adaptation value according to the adaptation height of the continuous at least one layer of model.
According to a second aspect of the present invention, there is provided a control device of a 3D printer, the device comprising:
the model area comparison module is used for obtaining the model area of the current printing layer of the model and the model area of the last printing layer and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value;
and the release height setting module is used for acquiring a release height adaptation value if the area change difference value is greater than or equal to the area change threshold value, and setting the release height adaptation value as the release height of the current printing layer of the model.
According to a third aspect of the present invention, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the 3D printer described above.
According to a fourth aspect of the present invention, there is provided a 3D printer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method of the 3D printer when executing the program.
According to the control method and device for the 3D printer, the storage medium and the 3D printer, the model area of the last printing layer is compared with the area change difference value of the model area of the current printing layer with the preset area change threshold, and when the area change difference value is greater than or equal to the area change threshold, the release height adaptation value is set as the release height of the current printing layer of the model, so that the release height of the 3D printer can be changed along with the change of the model area. Compared with the technical scheme that a fixed release height preset value is set for the 3D printer in the prior art, the method has the advantages that when the model area of the current printing layer of the model is reduced or equal to that of the last printing layer, the release height is adapted to the current printing layer of the model, the model printing speed can be improved, the model printing duration is reduced, and the printing efficiency is improved on the basis of guaranteeing the model printing effect and the model printing success rate.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 shows a flow chart of a control method of a 3D printer according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another control method of a 3D printer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a 3D printer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another control device of a 3D printer according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Before explaining the embodiments of the present application, a brief description is first made of the working process of the photo-curing 3D printer. When the photo-curing 3D printer prints the model, the trough holds resin and then is placed on an exposure screen of the 3D printer, a light source projects light to the trough from one side of the trough opposite to the exposure screen, the exposure screen is used for displaying patterns with specific outlines, the light passes through the patterns and is projected on the resin in the trough, the resin between the printing platform and the release film is cured, then a moving assembly of the 3D printer moves through driving the printing platform, the cured model is lifted upwards, the cured model is stripped from the release film at the bottom of the trough, the resin is filled between the formed model and the release film, then the next layer is continuously printed, and the rapid forming is realized by stacking.
During the printing of the model, there is some adhesion between the model and the release film, and therefore, there may also be interaction forces between the printing platform and one or more of the resin in the chute, the release film, the chute, or the exposure screen. The magnitude of the force of the interaction force is positively correlated with the area of the currently printed layer of the model. Therefore, the force applied to the printing platform (the tension detection value) can be detected to serve as the tension applied to the model in the process of stripping, the tension is also called as release force, and in order to successfully separate the model from the release film, the printing platform is often required to be lifted from the resin by the release force to a certain height, and the height is called as release height. In the prior art, the release height is generally set to a fixed higher value, but setting the release height to a higher value can result in slower speed of model printing, longer time of model printing and low printing efficiency.
In view of the above technical problem, in one embodiment, as shown in fig. 1, a control method of a 3D printer is provided, and a controller to which the method is applied to the 3D printer is taken as an example for explanation, and the method includes the following steps:
101. and obtaining the model area of the current printing layer and the model area of the last printing layer of the model, and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value.
Specifically, before the model starts to print, the 3D printer receives a print instruction sent by a user, and the controller responds to the print instruction and reads print file information of the model, wherein the print file information can include the total layer number of the model to be printed, graphic data of each layer of the model, print parameter data and other information. In addition, the print file information may further include a preset first release height value, where the first release height value is a relatively safe height value that is actually tested, for example, the first release height value may be set between 0.1mm and 50mm, for example, set to 8mm. After the printer is started, initializing a system; when receiving a print command sent by a user, the controller reads the relevant variable value in the print file information, sets the first release height value as a release height adaptation value, sets the current print layer as a first print layer, sets the adaptation height of each print layer of the model as zero, sets the storage quantity of the adaptation heights as zero, sets the model area of each print layer as zero, and the like.
Further, after the model starts to print, the controller will first read the graphic data and the print parameter data of the first print layer of the model, where the print parameter data includes the model area of the current print layer. Specifically, for the first print layer of the model, the model area of the last print layer is zero, for other print layers of the model, the model area of the current print layer of the model can be stored when the current print layer of the model is printed, and then the model area of the last print layer is obtained by reading the stored data when the next print layer of the model is printed. Or, the model area of each printing layer can be recorded in the printing parameter data of the corresponding layer in advance, so that when each printing layer of the printing model is performed, whether the model area of the last printing layer is larger than or equal to the model area of the current layer of the model can be judged in advance, and preparation is made for the follow-up determination of the release height. In this embodiment, the model area of the current print layer refers to the sum of the effective areas including all the print points of the current print layer.
Further, after the mold area of the current print layer and the mold area of the last print layer are obtained, it may be determined whether the area change difference between the mold area of the last print layer and the mold area of the current print layer is greater than or equal to a preset area change threshold. The area change difference is the difference of the model area of the last printing layer minus the model area of the current printing layer. It can be appreciated that the area change threshold may be set according to actual requirements, for example, in order to determine whether the model area of the current print layer is reduced from the model area of the previous print layer, the area change threshold may be set to a value greater than zero; in order to determine whether the model area of the current print layer is smaller than or the same as the model area of the previous print layer, the area change threshold may be set to zero. The present embodiment is not particularly limited here as to the setting range of the area change threshold value. In embodiments of the present invention, the area change threshold may be greater than or equal to zero. In general, this step is to determine whether the model area of the current printed layer is reduced from or the same as the model area of the previous printed layer.
102. And if the area change difference value is greater than or equal to the area change threshold value, acquiring a release height adaptation value, and setting the release height adaptation value as the release height of the current printing layer of the model.
Specifically, if the area change difference between the model area of the last printed layer and the model area of the current printed layer is greater than or equal to the area change threshold, it indicates that the model area of the current printed layer is less than or equal to the model area of the last printed layer. At this time, the release height adaptation value may be acquired, and set as the release height of the current print layer of the model. Specifically, the release height adaptation value may be determined by obtaining the height of the print platform raised when the previous print layer model is separated from the release film, for example, in this case, the raised height of the print platform when the previous print layer is released may be set to the height adaptation value of the current print layer, and the release height of the current print layer may be set to the height adaptation value. The mode of obtaining the release height adaptation value is determined by obtaining the lifting height of the printing platform when the last printing layer is released, so that when the model area of the current printing layer is smaller than or equal to that of the last printing layer, the lifting height value of the printing platform can be used as the release height adaptation value of the current printing layer to release the die when the current printing layer is released, the setting of release height of each printing layer is more flexible and convenient, and the printing efficiency is greatly improved on the premise of ensuring the printing quality.
In this embodiment, the release height adaptive value may also be one or more preset empirical values (the empirical value is smaller than or equal to the first release height value), or may be a height value calculated according to some parameters of the previous printing layer or the previous layers. It should be noted that, when the first print layer of the print model is printed, the release height adaptive value may be the same as the first release height value, and then, along with the continuous accumulation of the number of print layers and the continuous change of the model area of the print layer, the release height adaptive value may also be changed accordingly, and the overall change rule is that the release height is gradually reduced or kept unchanged along with the continuous decrease of the model area of the print layer, so that the specific setting mode of the release height adaptive value is not limited in this embodiment.
According to the control method of the 3D printer, the area change difference value between the model area of the last printing layer and the model area of the current printing layer is compared with the preset area change threshold, and when the area change difference value is greater than or equal to the area change threshold, the release height adaptation value is set as the release height of the current printing layer of the model, so that the release height of the 3D printer can be changed along with the change of the model area. Compared with the technical scheme that a fixed release height preset value is set for the 3D printer in the prior art, the method has the advantages that when the model area of the current printing layer of the model is reduced or equal to that of the last printing layer, the release height is adapted to the current printing layer of the model, the model printing speed can be improved, the model printing duration is reduced, and the printing efficiency is improved on the basis of guaranteeing the model printing effect and the model printing success rate.
In an embodiment of the present invention, on the basis of step 101 and step 102, the control method of the 3D printer may further include:
103. if the area change difference value is smaller than the area change threshold value, the preset first release height value is respectively set as the release height and the release height adaptation value of the current printing layer of the model.
Specifically, if the area change difference between the model area of the last printed layer and the model area of the current printed layer is smaller than the area change threshold, it is indicated that the model area of the current printed layer is larger than the model area of the last printed layer. At this time, a preset first release height value may be acquired, and the first release height value may be set as the release height of the current print layer of the model. In this embodiment, the first release height value is fixed for each print layer of the model, and the release height adaptation value may vary with the accumulation of the number of print layers and the change of the model area of the print layer. For example, in some scenarios, when the model area of the current print layer is smaller than or equal to the model area of the previous print layer for the first time, the release height adaptive value may be set to be the same as the first release height value, then in the process that the model area is continuously reduced, multiple calculations are performed through the model data of each print layer, and finally the release height adaptive value is changed to be smaller than the first release height value, so that the printing time waste caused by the too high release height is reduced, and meanwhile, the security of model printing is also ensured.
In the embodiment of the invention, if the model area of the current printing layer is increased compared with that of the last printing layer, the larger release height is required to ensure the normal demolding of the model. Therefore, in the scene, the first release height value can be set as a release height adaptation value, so that the success rate and the safety of printing of the current printing layer and the next printing layer of the model are ensured. The first release height value may be greater than or equal to the release height fit value. That is, during the model printing, there may be a case where the first release height value of one part of the print layers is equal to the release height fitting value, and the first release height value of the other part of the print layers is greater than the release height fitting value.
According to the control method of the 3D printer, the area change difference value between the model area of the last printing layer and the model area of the current printing layer is compared with the preset area change threshold, and when the area comparison results are different, the release height is set by using different height values according to the area comparison results, so that the release height of the 3D printer can be changed along with the change of the progress of model printing. Compared with the technical scheme that a fixed release height preset value is set for the 3D printer in the prior art, the method has the advantages that the release height is set to be smaller when the model area of the current printing layer of the model is smaller than or equal to that of the last printing layer, and the release height is set to be larger when the model area of the current printing layer is larger than that of the last printing layer, so that the model printing effect and the model printing success rate can be ensured, the model printing speed can be improved, the model printing duration can be reduced, and the printing efficiency can be improved.
In an embodiment of the present invention, on the basis of step 102 or step 103, the control method of the 3D printer may further include: and controlling the motor to run in response to the completion of printing of the current printing layer of the model, so that the printing platform is lifted according to the release height of the current printing layer of the model.
After determining the release height of the current printing layer of the model, the controller can control the motor to move downwards to execute the printing action of the model, then respond to the completion of printing of the current printing layer of the model, send out a motor control instruction according to the release height of the current printing layer of the model to control the motor to lift upwards, so that the printing platform can lift according to the release height of the current printing layer of the model. Specifically, the lifting height of the printing platform may be the same as the release height of the current printing layer of the model, or may be lifted by a certain height within a release height range, for example, the release height range may be represented by [ H-H1, h+h2], where H is the release height of the current printing layer, H1 and H2 are a height threshold greater than or equal to 0, and H1 and H2 may be equal or unequal. In this way, efficient control of the printing platform can be achieved, thereby completing a full workflow of printing and demolding of a print layer.
In an embodiment of the present invention, the control method of the 3D printer may further include: and detecting the stress of the printing platform, namely a tension detection value, in the running process of the motor, acquiring the tension detection value, judging whether the tension detection value is smaller than or equal to a preset first tension value, reading the lifting height of the printing platform when the tension detection value is smaller than or equal to the first tension value, and setting the lifting height of the printing platform as the adapting height of the current printing layer of the model. The tension detection value can be acquired through a tension sensor, and the tension sensor can be arranged on a stress part of the motor during operation, for example, a cantilever connected with the motor and the printing platform. Further, the first tension value may be a tension detection value of the tension sensor after the actual test when the tension sensor is not stressed, or may be a preset experience value that the representative model is separated from the release film, and the value may not be zero, but is between 20N and 50N, and the setting position of the tension sensor and the setting range and the setting value of the first tension value are not limited in this example. In this embodiment, the adaptive height of the current print layer of the model may be determined according to the lifting height of the print platform when the model is demolded, and the lifting height of the print platform may be determined according to the height of the motor or the current position of the motor when the model is demolded.
The method comprises the steps of collecting a tension detection value in the running process of a motor, comparing the tension detection value with a preset first tension value, and judging whether the current printing layer of the model is successfully demoulded. When the current printing layer of the model is successfully demolding, the lifting height of the printing platform can be read, and the lifting height of the printing platform is set to be the adapting height of the current printing layer of the model. By the method, the lifting height of the printing platform when the current printing layer of the model is demoulded can be recorded, so that a powerful reference is provided for setting a follow-up release height adaptation value, and the printing efficiency of the model is improved.
In an embodiment of the present invention, on the basis of step 102, the control method of the 3D printer may further include: and acquiring the adapting height of the continuous at least one layer of model, and then determining the release height adapting value according to the adapting height of the continuous at least one layer of model. In this embodiment, the height of each layer of the mold may be determined according to the lifting height of the printing platform when the corresponding layer of the mold is released, so that the height value of the height of any layer of the mold is smaller than or equal to the preset first release height value.
After determining the adaptation height of the current print layer of the model, when printing the next layer, whether the area change difference between the model area of the previous print layer and the model area of the current print layer is greater than or equal to a preset area change threshold value can be judged again, if the area change difference is greater than or equal to the area change threshold value, it is indicated that the model area of the current print layer is less than or equal to the model area of the previous print layer, at this time, the adaptation height of at least one layer of models including continuous can be obtained, and the release height adaptation value can be determined according to the obtained adaptation height of at least one layer of models. According to the embodiment, when the model area of the current printing layer is smaller than or equal to the model area of the last printing layer, the release height adaptation value is determined according to the adaptation height of at least one layer of continuous models, so that the success rate and safety of demolding of the models by using the release height adaptation value can be guaranteed, meanwhile, the release height adaptation value is determined according to the adaptation height, the release height adaptation value can be reduced, the release height of the next printing layer of the models is reduced, the printing time waste is reduced, and the printing efficiency of the models is improved.
In an embodiment of the present invention, the step of obtaining the adapted height of the continuous at least one layer of models may be performed by: and storing the adaptation height of the current printing layer of the model in a storage space, judging whether the number of the adaptation heights stored in the storage space is larger than or equal to a preset number value, and acquiring the adaptation height of at least one continuous layer of model in the storage space if the number of the adaptation heights stored in the storage space is larger than or equal to the preset number value. The preset number value, the number of the adapting heights stored in the storage space and the number of the adapting heights of the obtained continuous at least one layer of model can be set according to actual situations. It will be appreciated that the number of acquired adaptation heights needs to be less than or equal to a preset number value and less than or equal to the number of adaptation heights stored in the storage space. In addition, the storage space may be embodied in the form of an array or the like, and the embodiment is not particularly limited herein.
When the number of the adapting heights stored in the storage space is greater than or equal to a preset number value, the controller can successfully read the adapting height of the continuous at least one layer of model, and at this time, the adapting value of the release height can be determined according to the read adapting height of the at least one layer of model. In this embodiment, the controller may store the adapted height of each print layer one by one according to the order of the print layers, so as to directly read the adapted height of the continuous at least one layer of model; in addition, if the detection of the adapting height of the current printing layer is considered to be wrong, or when the number of adapting heights stored in the storage space reaches a preset number value, the adapting heights in the storage space can be emptied, and the adapting heights of each printing layer can be stored one by one according to the sequence of the printing layers, so that the data storage space is saved, for example, three adapting heights of the second printing layer, the last printing layer, the current printing layer and the like are saved again. Further, the controller may read only the adaptation height of the current print layer, and determine the release height adaptation value according to the adaptation height of the current print layer; the adaptation height of the plurality of printing layers including the adaptation height of the current printing layer can also be read, and the release height adaptation value is determined according to the adaptation height of the plurality of printing layers. According to the embodiment, the adaptive height of the current printing layer is stored, and the adaptive height of the continuous at least one layer of model is read in the storage space, so that the management difficulty of data can be reduced, and the acquisition efficiency of the adaptive height is improved.
In an embodiment of the present invention, the control method of the 3D printer may further include: if the number of the adaptation heights in the storage space is smaller than the preset number value, the adaptation value of the release height is kept unchanged. For example, when the number of preset number values and the number of the adapting heights to be read are 3, if the number of the adapting heights in the storage space is only 2, the adapting heights of the continuous three-layer model cannot be read, and at this time, the adapting value of the release height can be kept unchanged.
When the number of the adapting heights stored in the storage space is smaller than the preset number value, the controller cannot successfully read out the continuous preset number value adapting heights, so that the release height adapting value cannot be determined according to the preset number value adapting heights. In this scenario, when the next print layer of the model is printed, if the area change difference between the model area of the current print layer and the model area of the next print layer is greater than or equal to the area change threshold, the current release height adaptation value may be set to be the release height of the next print layer, so that the release height of the next print layer is the same as the release height of the current print layer. By the method, printing time can be reduced to a certain extent, printing efficiency is improved, and meanwhile, the problem of model printing failure caused by directly reducing release height can be prevented.
In an embodiment of the present invention, the step of determining the release height adaptation value according to the adaptation height of the continuous at least one layer of model may be performed by: the maximum value of the adaptation heights of the continuous at least one layer of models is set as the release height adaptation value.
If the adapting height of at least one layer of continuous models with preset quantity values can be successfully obtained, the maximum value in the adapting height of at least one layer of models can be directly set as the releasing height adapting value, for example, the preset quantity value is three, the maximum value in the adapting height of the previous continuous three-layer models can be set as the releasing height adapting value, so that when the next printing layer of the models is printed, if the area change difference value between the model area of the current printing layer and the model area of the next printing layer exceeds the area change threshold value, the maximum value in the adapting height of the previous continuous three-layer models can be set as the releasing height of the next printing layer of the models, and the releasing height of the next printing layer is reduced. The maximum value is selected from the adaptation heights of the continuous three-layer models and is set as the release height adaptation value, so that the success rate and the safety of model printing can be guaranteed to the greatest extent, meanwhile, the model printing time is shortened, and the printing efficiency of the model is improved.
In an embodiment of the present invention, the control method of the 3D printer may further include: after the lifting height of the printing platform reaches the release height of the current printing layer of the model, judging whether the current tension detection value is larger than the first tension value, if so, setting a release height compensation value, and controlling the operation of a motor so that the lifting height of the printing platform is identical to the release height compensation value. In this embodiment, the initial value of the height compensation value may be set to zero. In addition, the first tension value may be a tension detection value of the tension sensor after the actual test is not stressed, or may be a preset experience value representing that the model is separated from the release film or a tension minimum value when the model is released.
After the lifting height of the printing platform reaches the release height of the current printing layer of the model, the collected current tension detection value is smaller than or equal to the first tension value, and if the current tension detection value is larger than the first tension value, the model is not successfully demoulded. At this time, a release height compensation value may be set, wherein the release height compensation value may be set between 0.1mm and 0.5mm, for example, the release height compensation value may be set to 0.5mm, and then, the motor is controlled to operate, so that the printing platform is lifted again, and the lifting height is the same as the release height compensation value. This process may be performed one or more times, for example, after the print platform is lifted once by the release height compensation value, the current tension detection value is detected again, and if the current tension detection value is found to be still greater than the first tension value, the compensation and lifting are performed again, and if not greater than the first tension value, the next print layer of the model is continued to be printed. According to the embodiment, the lifted tension detection value is detected, and when the current tension detection value is larger than the first tension value, the motor is controlled to be lifted upwards by a certain compensation height, so that the failure rate of model printing can be reduced.
In an embodiment of the present invention, the control method of the 3D printer may further include: judging whether the sum of the release height of the current printing layer of the model and the release height compensation value is larger than a first release height value, and if the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value, sending out alarm prompt information.
After the release height compensation value is set, whether the sum of the release height of the current printing layer of the model and the release height compensation value is greater than a first release height value or not can be further judged, and if the sum is greater than the first release height value, the fact that the lifting of the printing platform reaches the maximum value at the moment is indicated. If the tension detection value acquired at the moment is still larger than the first tension value, the model is indicated to have the defects of fracture and the like or the tension detection value is indicated to be inaccurate. Therefore, the controller can send an alarm prompt message to prompt a user to adjust or stop the printing process, so that the time loss and the economic loss of model printing are reduced. In this embodiment, when it is detected that the sum of the release height of the current print layer of the model and the release height compensation value is greater than the first release height value, the motor may not be controlled to operate, but alarm prompt information may be directly sent, or the alarm prompt information may be sent after the motor is controlled to operate. In addition, the alarm prompt information can be directly displayed on the operation screen or can be sent to the terminal where the user is located through the network, and the execution sequence of the motor control and alarm prompt information and the sending mode of the alarm prompt information are not particularly limited in this embodiment.
In an embodiment of the present invention, after the lifting height of the printing platform reaches the release height of the current printing layer of the model, the control method of the 3D printer may further include: and if the current tension detection value is larger than the first tension value, emptying the adaptive height stored in the storage space.
After the lifting height of the printing platform reaches the release height of the current printing layer of the model, if the current tension detection value is still larger than the first tension value, the model is not successfully demoulded. At this time, the adaptive height stored in the storage space can be emptied, so that the previously possibly inaccurate adaptive height value is removed, the subsequent printing layer is prevented from taking the adaptive height value as the lifting height of the printing platform, and the failure probability of model printing can be reduced.
In order to fully describe the implementation process of the embodiment, the embodiment of the present invention provides a control method of a 3D printer, as shown in fig. 2, where the method includes:
201. and obtaining the model area of the current printing layer and the model area of the last printing layer, and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value.
Wherein the area change threshold is greater than or equal to zero.
202. And if the area change difference value is greater than or equal to the area change threshold value, acquiring a release height adaptation value, and setting the release height adaptation value as the release height of the current printing layer of the model.
203. If the area change difference value is smaller than the area change threshold value, the preset first release height value is respectively set as the release height and the release height adaptation value of the current printing layer of the model.
The first release height value is larger than or equal to the release height adaptation value.
204. And controlling the motor to run in response to the printing completion of the current printing layer of the model, collecting a tension detection value in the running process of the motor, and judging whether the tension detection value is smaller than or equal to a preset first tension value.
The first tension value is a tension detection value when the tension sensor is not stressed, or an empirical value that the model is separated from the release film, or a tension minimum value when the model is released.
205. When the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, setting the lifting height of the printing platform as the adapting height of the current printing layer of the model, and storing the adapting height of the current printing layer of the model in the storage space.
206. And judging whether the number of the adaptive heights stored in the storage space is larger than or equal to a preset number value.
207. If the number of the adapting heights stored in the storage space is larger than or equal to a preset number value, acquiring adapting heights of at least one layer of continuous models in the storage space, and setting the maximum value of the adapting heights of at least one layer of continuous models as a release height adapting value.
208. After the lifting height of the printing platform reaches the release height of the current printing layer of the model, judging whether the current tension detection value is larger than the first tension value.
209. And if the current tension detection value is larger than the first tension value, setting a release height compensation value.
210. Judging whether the sum of the release height of the current printing layer of the model and the release height compensation value is larger than a first release height value or not.
211. And if the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value, sending out alarm prompt information.
212. And if the sum of the release height of the current printing layer of the model and the release height compensation value is smaller than or equal to the first release height value, controlling the motor to operate so that the lifting height of the printing platform is the same as the release height compensation value.
The implementation process and the beneficial effects of each step may refer to the descriptions in the previous embodiments, and are not repeated here. It will be appreciated that each print layer of the model may perform printing in this manner until all print layers of the model have been performed, resulting in a printed model. According to the control method of the 3D printer, when the model area of at least one continuous printing layer is continuously reduced, the release height is set to be the maximum value of the adaptation heights of the plurality of printing layers which are continuously reduced before, and when the model area of the printing layer is increased, a larger release height is set, so that the model printing speed can be improved, the model printing duration can be reduced, and the printing efficiency can be improved on the basis of ensuring the model printing effect and the model printing success rate. In addition, the method can improve the accuracy of the determination of the adaptation height and improve the safety of the determination of the release height by collecting the tension detection value in the running process of the motor and determining the adaptation height of each printing layer through the tension detection value. In addition, when the release height is reached, the method determines whether the model is successfully released from the mold again through the tension detection value, and sends out alarm information when the model is unsuccessful, so that a user can be prompted to timely handle the fault condition, and economic and time losses are reduced.
In an embodiment of the present invention, as a specific implementation of the methods shown in fig. 1 and fig. 2, the present embodiment provides a control device of a 3D printer, as shown in fig. 3, where the device includes: a model area comparison module 31 and a release height setting module 32.
The model area comparison module 31 is configured to obtain a model area of a current print layer and a model area of a previous print layer of the model, and determine whether an area change difference between the model area of the previous print layer and the model area of the current print layer is greater than or equal to a preset area change threshold;
the release height setting module 32 may be configured to obtain a release height adaptation value if the area variation difference is greater than or equal to the area variation threshold, and set the release height adaptation value as a release height of a current print layer of the model.
In the embodiment of the present invention, the release height setting module 32 may be further configured to set the preset first release height value as the release height and the release height adaptation value of the current print layer of the model, respectively, if the area change difference value is smaller than the area change threshold.
In the embodiment of the present invention, as shown in fig. 4, the apparatus further includes a motor operation control module 33, where the motor operation control module 33 is configured to control the motor operation in response to the completion of printing the current print layer of the model, so as to lift the print platform according to the release height of the current print layer of the model.
In the embodiment of the present invention, as shown in fig. 4, the apparatus further includes an adaptive height determining module 34, where the adaptive height determining module 34 may be configured to collect a tension detection value during a running process of the motor, and determine whether the tension detection value is less than or equal to a preset first tension value; when the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adapting height of the current printing layer of the model.
In the embodiment of the present invention, as shown in fig. 4, the apparatus further includes an adaptation value determining module 35, where the adaptation value determining module 35 is configured to obtain an adaptation height of the continuous at least one layer of model; and determining a release height adaptation value according to the adaptation height of the continuous at least one layer of model.
In the embodiment of the present invention, the matching value determining module 35 is specifically configured to store the adaptive height of the current print layer of the model in the storage space; judging whether the number of the adaptive heights stored in the storage space is larger than or equal to a preset number value; and if the number of the adaptation heights stored in the storage space is greater than or equal to a preset number value, acquiring the adaptation heights of at least one layer of continuous models in the storage space.
In an embodiment of the present invention, the adaptation value determining module 35 is specifically configured to set the maximum value of the adaptation heights of the continuous at least one layer of models as the release height adaptation value.
In the embodiment of the present invention, as shown in fig. 4, the apparatus further includes a release height compensation module 36, where the adaptive height storage module 36 is configured to determine whether the current tension detection value is greater than a preset first tension value after the lifting height of the printing platform reaches the release height of the current printing layer of the model; if the current tension detection value is larger than the first tension value, setting a release height compensation value; and controlling the motor to run so that the lifting height of the printing platform is the same as the release height compensation value.
In the embodiment of the present invention, as shown in fig. 4, the apparatus further includes an alarm information sending module 37, and the adaptive height storage module 37 may be configured to determine whether a sum of a release height of a current print layer of the model and a release height compensation value is greater than a first release height value; and if the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value, sending out alarm prompt information.
In the embodiment of the present invention, the release height setting module 32 is further configured to set a preset first release height value as a release height and a release height adaptation value of a current print layer of the model if the area variation difference value is smaller than the area variation threshold, where the first release height value is greater than or equal to the release height adaptation value and the area variation threshold is greater than or equal to zero; the motor operation control module 33 is further configured to control the motor to operate so that the lifting height of the printing platform is the same as the release height of the current printing layer of the model in response to the completion of printing of the current printing layer of the model; the adaptive height determining module 34 may be further configured to collect a tension detection value during operation of the motor, and determine whether the tension detection value is less than or equal to a preset first tension value, where the first tension value is a tension detection value when the tension sensor is not stressed, or an empirical value that the model has been separated from the release film, or a minimum tension value when the model is released; when the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adaptive height of the current printing layer of the model; the adaptation value determining module 35 is further configured to obtain an adaptation height of the continuous at least one layer of model; and determining a release height adaptation value according to the adaptation height of the continuous at least one layer of model.
In an embodiment of the present invention, a 3D printer includes a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements a control method of the 3D printer as shown in fig. 1 and 2.
It should be noted that, in the 3D printer and other corresponding descriptions of the functional units related to the control device of the 3D printer provided in this embodiment, reference may be made to fig. 1 and fig. 2, and corresponding descriptions in all the foregoing descriptions in the description of the present invention are not repeated herein.
Based on the above-mentioned methods shown in fig. 1 and 2, correspondingly, the present embodiment further provides a storage medium having a computer program stored thereon, where the program, when executed by a processor, implements the above-mentioned control method of the 3D printer shown in fig. 1 and 2.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, where the software product to be identified may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disc, a mobile hard disk, etc.), and include several instructions to cause a 3D printer (may be a personal computer, a server, or a network device, etc.) to perform the methods described in various implementation scenarios of the present application.
Based on the method shown in fig. 1 and fig. 2 and the embodiment of the control device of the 3D printer shown in fig. 3 and fig. 4, in order to achieve the above object, the present embodiment further provides an entity device for controlling the 3D printer, which may specifically be a personal computer, a server, a smart phone, a tablet computer, a smart watch, or other network devices, where the entity device includes a storage medium and a processor; a storage medium storing a computer program; a processor for executing a computer program to implement the method as shown in fig. 1 and 2.
The physical device may further include, among other things, a user interface, a network interface, a camera, radio Frequency (RF) circuitry, sensors, audio circuitry, WI-FI modules, and the like. The user interface may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), etc.
It will be appreciated by those skilled in the art that the structure of the controlled entity device of the 3D printer provided in this embodiment is not limited to the entity device, and may include more or fewer components, or may combine some components, or may be different in arrangement of components.
The storage medium may also include an operating system, a network communication module. The operating system is a program for managing the entity equipment hardware and the software resources to be identified, and supports the operation of the information processing program and other software and/or programs to be identified. The network communication module is used for realizing communication among all components in the storage medium and communication with other hardware and software in the information processing entity equipment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented by means of software plus necessary general hardware platforms, or may be implemented by hardware. The area change difference value of the model area of the last printing layer and the model area of the current printing layer is compared with the preset area change threshold value, and when the area comparison results are different, the release height is set by using different height values, so that the release height of the 3D printer is changed in real time along with the progress of model printing. Compared with the prior art, the method can improve the speed of model printing and reduce the duration of model printing on the basis of guaranteeing the model printing effect and the model printing success rate, thereby improving the printing efficiency.
The foregoing application serial numbers are merely for description, and do not represent advantages or disadvantages of the implementation scenario. The foregoing disclosure is merely a few specific implementations of the present application, but the present application is not limited thereto and any variations that can be considered by a person skilled in the art shall fall within the protection scope of the present application.

Claims (12)

1. A method for controlling a 3D printer, the method comprising:
acquiring the model area of a current printing layer and the model area of a last printing layer of a model, and judging whether the area change difference value between the model area of the last printing layer and the model area of the current printing layer is larger than or equal to a preset area change threshold value;
and if the area change difference value is larger than or equal to the area change threshold value, acquiring a release height adaptation value, and setting the release height adaptation value as the release height of the current printing layer of the model.
2. The method according to claim 1, wherein the method further comprises:
and if the area change difference value is smaller than the area change threshold value, respectively setting a preset first release height value as the release height of the current printing layer of the model and the release height adaptation value.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
and controlling the motor to run in response to the completion of printing of the current printing layer of the model, so that the printing platform is lifted according to the release height of the current printing layer of the model.
4. A method according to claim 3, characterized in that the method further comprises:
collecting a tension detection value in the running process of the motor, and judging whether the tension detection value is smaller than or equal to a preset first tension value;
and when the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adaptive height of the current printing layer of the model.
5. The method according to claim 4, wherein the method further comprises:
acquiring the adaptation height of at least one layer of continuous model;
and determining the release height adaptation value according to the adaptation height of the continuous at least one layer of model.
6. The method of claim 5, wherein the obtaining the adapted height of the continuous at least one layer of models comprises:
saving the adapted height of the current print layer of the model in a storage space;
Judging whether the number of the adaptive heights stored in the storage space is larger than or equal to a preset number value;
and if the number of the adaptation heights stored in the storage space is greater than or equal to the preset number value, acquiring the adaptation heights of the continuous at least one layer of models in the storage space.
7. The method of claim 5, wherein said determining said release height fit value based on the fit height of said continuous at least one layer model comprises:
and setting the maximum value of the adaptation heights of the continuous at least one layer of models as the release height adaptation value.
8. The method according to claim 1 or 2, characterized in that the method further comprises:
after the lifting height of the printing platform reaches the release height of the current printing layer of the model, judging whether the current tension detection value is larger than a preset first tension value or not;
if the current tension detection value is larger than the first tension value, setting a release height compensation value;
and controlling the motor to run so that the lifting height of the printing platform is the same as the release height compensation value.
9. The method of claim 8, wherein the method further comprises:
Judging whether the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value or not;
and if the sum of the release height of the current printing layer of the model and the release height compensation value is larger than the first release height value, sending out alarm prompt information.
10. The method according to claim 1, wherein the method further comprises:
if the area change difference value is smaller than the area change threshold value, respectively setting a preset first release height value as the release height of the current printing layer of the model and the release height adaptation value, wherein the first release height value is larger than or equal to the release height adaptation value, and the area change threshold value is larger than or equal to zero;
controlling the operation of a motor to enable the lifting height of a printing platform to be the same as the release height of the current printing layer of the model in response to the completion of printing of the current printing layer of the model;
collecting a tension detection value in the running process of a motor, and judging whether the tension detection value is smaller than or equal to a preset first tension value, wherein the first tension value is a tension detection value when a tension sensor is not stressed, or an empirical value that a model is separated from a release film, or a minimum tension value when the model is released;
When the tension detection value is smaller than or equal to the first tension value, reading the lifting height of the printing platform, and setting the lifting height of the printing platform as the adaptive height of the current printing layer of the model;
acquiring the adaptation height of at least one layer of continuous model;
and determining the release height adaptation value according to the adaptation height of the continuous at least one layer of model.
11. A storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the method of any of claims 1 to 10.
12. A 3D printer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program when executed by the processor implements the steps of the method of any one of claims 1 to 10.
CN202310390330.5A 2023-04-04 2023-04-04 Control method of 3D printer, storage medium and 3D printer Pending CN116423843A (en)

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