An automatic leveling method and leveling device for a conveyor-type 3D printer

Abstract

The present invention provides a method and a leveling device for automatic leveling of a conveyor type 3D printer, relating to the technical field of 3D printing. The method includes calibrating a preset threshold value based on a preset calibration algorithm and calibration data to obtain an initial threshold value; obtaining the contact pressure between the nozzle and the hot bed through the deformation of the sensing sheet, and transmitting the contact pressure to a strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge; comparing the received voltage signal converted by the strain gauge with the initial threshold value formed by detecting the distances at multiple points based on a comparison algorithm to obtain a comparison result; determining the contact state between the nozzle and the hot bed according to the obtained comparison result of high level or low level, and when they are in contact, calculating an adjustment amount according to the contact state by using a data processing algorithm and generating an adjustment instruction; controlling the print head to rise or fall according to the adjustment amount based on the adjustment instruction. The present invention realizes automatic leveling, improves the leveling accuracy, simplifies the operation process and reduces the printing failure rate.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and particularly to an automatic leveling method and a leveling device for a conveyor-type 3D printer. Background Art

[0002] With the wide application of 3D printing technology in multiple fields such as industrial manufacturing, bioengineering, architecture, and art, the requirements for its printing accuracy and stability are continuously increasing. Especially in the field of conveyor-type 3D printing, due to its unique working mechanism, precise distance control between the printing platform (i.e., the heated bed) and the print head becomes crucial. The traditional manual leveling method relies on the operator's experience and skills, and adjusts the height of the heated bed by rotating adjustment screws or adjusting nuts in order to meet the flatness requirements. However, this method has the following disadvantages:

[0003] Accuracy limitation: Manual leveling relies on human eye judgment and manual operation, making it difficult to achieve the accuracy requirements at the micron level, and there may be slight differences in the repeated leveling operations before each printing.

[0004] Time-consuming: Users need to repeatedly adjust and detect multiple points of the heated bed to ensure the flatness of the entire printing platform, which is usually time-consuming and boring.

[0005] Stability problem: Even if the initial leveling is successful, long-term use or mechanical vibration may still cause slight position offsets of the heated bed, affecting the stability and consistency of subsequent printing operations.

[0006] High user threshold: For users lacking experience, it takes a long time to learn and practice precise manual leveling skills.

[0007] Low production efficiency: Manual leveling reduces production efficiency. Especially in a production environment where printing tasks need to be frequently changed, the time consumed for each leveling will greatly reduce the actual printing time.

[0008] Therefore, it is necessary to provide an automatic leveling method and a leveling device for a conveyor-type 3D printer to solve the above technical problems. Summary of the Invention

[0009] To solve the above technical problems, the present invention provides an automatic leveling method and a leveling device for a conveyor-type 3D printer, which automatically adjust the height of the print head by real-time monitoring the distance between the nozzle and the heated bed, so as to meet the accuracy requirements set by the user.

[0010] An automatic leveling method for a conveyor-type 3D printer provided by the present invention, the leveling method includes the following steps:

[0011] Calibrate a preset threshold based on a preset calibration algorithm and calibration data to obtain an initial threshold;

[0012] Obtain the contact pressure between the nozzle and the heated bed through the deformation of the sensing sheet, and transmit the contact pressure to the strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge;

[0013] Based on a comparison algorithm, compare the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the distances at multiple points to obtain a comparison result, wherein the comparison result is represented by a high level or a low level;

[0014] Determine the contact state between the nozzle and the heated bed according to the obtained comparison result of high level or low level, specifically:

[0015] If the comparison result is a low level, it indicates that the contact state is non-contact,

[0016] If the comparison result is a high level, it indicates that the contact state is contact, and use a data processing algorithm to calculate an adjustment amount according to the contact state, and at the same time generate an adjustment instruction.

[0017] Based on the adjustment instruction, control the print head of the printer to act according to the adjustment amount to achieve automatic leveling, wherein the actions include the print head rising or falling.

[0018] Preferably, the data processing algorithm adopts a median filtering algorithm.

[0019] Preferably, the comparison algorithm adopts a differential comparison algorithm.

[0020] Preferably, before comparing the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the distances at multiple points based on the comparison algorithm, it further includes:

[0021] Perform signal amplification processing on the voltage signal output by the strain gauge.

[0022] Preferably, the rising or falling of the print head is realized by a motor.

[0023] The present invention also provides a conveyor type 3D printer automatic leveling device, which is applied to the above leveling method, and the leveling device includes:

[0024] A sensing sheet, which is assembled on the print head;

[0025] A strain gauge, which is connected to the upper end of the sensing sheet;

[0026] A control board, which is installed on the print head and is electrically connected to the strain gauge to receive the voltage signal output by the strain gauge;

[0027] A motor, the motor and the print head are cooperated through a linkage assembly to realize the rising or falling of the print head.

[0028] Preferably, the control board includes:

[0029] A threshold calibration module for calibrating a preset threshold based on a preset calibration algorithm and calibration data to obtain an initial threshold;

[0030] A deformation detection module for obtaining the contact pressure between the nozzle and the hot bed through the deformation of the sensing sheet and transmitting the contact pressure to the strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge;

[0031] A signal comparison module for comparing the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the distances at multiple points based on a comparison algorithm to obtain a comparison result, wherein the comparison result is represented by a high level or a low level;

[0032] A data processing module for determining the contact state between the nozzle and the hot bed according to the obtained comparison result of high level or low level, specifically:

[0033] If the comparison result is a low level, it indicates that the contact state is not in contact,

[0034] If the comparison result is a high level, it indicates that the contact state is in contact, and an adjustment amount is calculated according to the contact state by using a data processing algorithm, and an adjustment instruction is generated at the same time;

[0035] An adjustment module for controlling the print head of the printer to act according to the adjustment amount based on the adjustment instruction to realize automatic leveling, wherein the actions include the rising or falling of the print head.

[0036] Preferably, the control board further includes:

[0037] A signal amplification module for performing signal amplification processing on the voltage signal output by the strain gauge.

[0038] Compared with the related art, a conveyor type 3D printer automatic leveling method and its leveling device provided by the present invention have the following beneficial effects:

[0039] 1. The present invention uses strain gauge technology to accurately measure the gap between the print head and the hot bed, converts the contact pressure obtained through the deformation of the sensing sheet into a voltage signal, and combines a preset calibration algorithm and data to realize automatic leveling. The automatic leveling mechanism ensures that an appropriate distance is maintained between the print head and the hot bed, thereby significantly improving the adhesion effect with the hot bed when printing a model, avoiding deviation and unstable factors during the printing process, and improving the printing quality.

[0040] 2. The present invention eliminates the complex process of manual leveling in traditional 3D printing. Users can operate it without professional knowledge. They only need to start the automatic leveling program, which reduces human error and saves a lot of time. The automated workflow not only greatly improves work efficiency but also significantly enhances the user experience, making the operation of the 3D printer more convenient and intuitive, and saving the user's time cost for learning and operation.

[0041] 3. The accurate automatic leveling function of the present invention helps to minimize common problems such as poor first-layer lamination, warping, and model detachment, which are usually caused by leveling errors. By automatically adjusting the position of the print head to ensure an appropriate distance between it and the heated bed, the risk of printing failure caused by inaccurate leveling is reduced, and the printing success rate is significantly improved. This not only saves materials and time but also ensures the continuity and reliability of the printing work, which is of great significance for professional printing and mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic structural diagram of the print head of the present invention;

[0043] Figure 2 It is a schematic module structure diagram of the control board of the present invention;

[0044] Figure 3 It is a schematic flow diagram of the leveling method of the present invention;

[0045] Figure 4 It is a schematic structural diagram of the printer of the present invention;

[0046] Figure 5 It is a schematic diagram of multi-point distance detection of the printer of the present invention;

[0047] Reference numerals in the figures: 1, induction sheet; 2, strain gauge; 3, control board; 4, print head; 5, first-direction moving mechanism; 6, second-direction moving mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention and not to limit the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings rather than all structures. Furthermore, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0049] It should also be noted that, for ease of description, only the part relevant to the present invention but not all content is shown in the accompanying drawings. It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processing or methods depicted as flow charts. Although the flow chart describes each operation (or step) as sequential processing, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. When its operation is completed, the processing can be terminated, but it can also have additional steps not included in the accompanying drawings. The processing can correspond to methods, functions, procedures, subroutines, subprograms, etc.

[0050] Embodiment 1

[0051] The present invention provides a method for automatically leveling a transmission type 3D printer, referring to Figure 3 As shown, the leveling method comprises the following steps:

[0052] S1: Calibrate a preset threshold based on a preset calibration algorithm and calibration data to obtain an initialization threshold.

[0053] In this embodiment, after the entire printer is powered on, a preset calibration algorithm and calibration data are used to accurately calibrate the threshold in the data processing process to ensure the accuracy and reliability of the threshold, especially optimized for the special requirements of the 45° 3D printer.

[0054] Exemplarily, after power-on, a preset calibration algorithm and calibration data are loaded. These data are pre-collected and determined based on the characteristics of a 45° 3D printer, taking into account the special angles and possible variables during printing. Then, the calibration algorithm runs to compare the expected input (such as the output signal of the strain gauge under different pressures) with the actual measured value, and adjusts the threshold used to determine the contact state between the nozzle and the hot bed during data processing based on the comparison result. For example, if the measured value is lower than the expected value, the threshold is increased; conversely, if the measured value is higher than the expected value, the threshold is lowered, and the above steps are repeated until the predetermined accuracy requirement is met or the preset number of iterations is completed. Finally, the final threshold is stored for use in subsequent printing processes. This step uses a series of known data (these data are collected during the design and testing phases and reflect the strain gauge deformation corresponding to the ideal contact pressure) to adjust the threshold to ensure that it can accurately identify when the nozzle contacts the hot bed.

[0055] Specifically, the calibration algorithm adopts a multi-point average algorithm, that is, by presetting multiple detection points on the hot bed, for example, Figure 5 Points A, B, C, D, E, and F in the figure form a leveling reference line based on the pressure feedback of the nozzle at each point.

[0056] S2: Obtain the contact pressure between the nozzle and the hot bed through the deformation of the induction sheet, and transmit the contact pressure to the strain gauge connected to the induction sheet, so as to convert the contact pressure into a voltage signal through the strain gauge.

[0057] In this embodiment, when the nozzle of the print head touches the hot bed, first, the induction sheet deforms, and this deformation will be transmitted to the strain gauge. The strain gauge, which is a pressure sensor, will convert the deformation into a voltage signal, but the voltage signal obtained at this time is weak.

[0058] S3: Perform signal amplification processing on the voltage signal output by the strain gauge.

[0059] In this embodiment, an optimized amplification circuit is used to amplify the electrical signal output by the strain gauge, reduce parasitic effects and coupling noise, improve the strength and stability of the signal, and reduce the influence of noise.

[0060] Specifically, the optimized amplification circuit adopts a low-noise instrumentation amplifier structure to amplify the electrical signal output by the strain gauge deformation detection module. The optimized circuit can reduce parasitic effects and coupling noise. At the same time, a negative feedback mechanism is introduced to cancel the noise generated inside the amplifier through the feedback loop, improving the linearity and stability of the amplifier. In addition, noise suppression processing is performed on the power supply to reduce the influence of power supply noise on the performance of the amplifier.

[0061] S4: Compare the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the distances at multiple points based on a comparison algorithm to obtain a comparison result, where the comparison result is represented by a high level or a low level.

[0062] In this embodiment, compare the amplified voltage signal with the calibrated initial threshold to determine whether the signal exceeds the threshold, which can accurately identify small signal changes and determine the contact state between the nozzle and the hot bed.

[0063] Specifically, the comparison algorithm adopts a differential comparison algorithm. Its specific working process is as follows: First, calculate the difference value of the continuous signal, that is, the difference between the current signal value and the previous signal value. This difference value represents the change rate or trend of the signal. Then, perform comparison and judgment: Compare the calculated difference value with a preset threshold. If the difference value is greater than the threshold, it is considered that the signal has changed significantly, that is, the nozzle may be in contact with the hot bed; if the difference value is less than the threshold, it is considered that the signal has not changed significantly, that is, the nozzle may not be in contact with the hot bed. Then, according to the comparison result, output a high level or a low level, respectively representing the contact states of contacting the hot bed and not contacting the hot bed.

[0064] S5: Determine the contact state between the nozzle and the hot bed according to the obtained comparison result of high level or low level, specifically:

[0065] If the comparison result is low level, it indicates that the contact state is non-contact.

[0066] If the comparison result is high level, it indicates that the contact state is contact, and an adjustment amount is calculated according to the contact state by using a data processing algorithm, and an adjustment instruction is generated at the same time.

[0067] In this embodiment, if the comparison result is high level, it is judged as contact; if the comparison result is low level, it is judged as non-contact. Then when the contact state is contact, a data processing algorithm is used to calculate the adjustment amount and generate an adjustment instruction, which can accurately calculate the adjustment amount to be adjusted, so as to control the lifting of the print head and realize automatic leveling.

[0068] Specifically, the data processing algorithm adopts a median filtering algorithm, and the specific calculation process is as follows: a series of comparison results (high level or low level) are collected in advance, and these results reflect the contact state between the nozzle and the hot bed in consecutive measurement cycles; then, the median filtering algorithm is applied to the series of comparison results collected, which means sorting the result sequence and selecting the value in the middle as the output. If the sequence length is even, the average of the two middle values is usually taken. Finally, the current contact state is determined according to the result after median filtering. Since median filtering can reduce the influence of outliers, it can be considered that this result more accurately reflects the actual contact state. Finally, the median obtained by the median filtering algorithm can be regarded as a reliable representation of the current contact state between the nozzle and the hot bed. This median helps to eliminate misjudgments caused by occasional abnormal data points (such as electrical noise or instantaneous interference); according to the result of median filtering, one or more thresholds are determined to judge whether the nozzle touches the hot bed; then, the deviation between the current median and the ideal contact state is measured, and the ideal contact state is the median expected when the nozzle just touches the hot bed; based on the magnitude and direction of the deviation, it is decided whether to adjust the print head up or down and the specific amount of adjustment. If the median continuously deviates from the ideal contact state, a larger adjustment may be required; if the median is close to the ideal state, only fine adjustment is needed; finally, according to the calculated adjustment amount, specific control instructions are formulated, and these instructions will be sent to the control system of the printer to perform actual physical adjustments.

[0069] S6: Based on the adjustment instruction, control the print head of the printer to act according to the adjustment amount to realize automatic leveling, where the action includes the print head rising or falling.

[0070] In this embodiment, according to the adjustment instruction, control the motor to drive the print head to rise or fall to realize high-precision automatic leveling, improve the adhesion effect with the hot bed when printing the model, and reduce the probability of printing failure.

[0071] In addition, when determining whether the nozzle and the heated bed reach an ideal gap, there is a deviation of up to 2 millimeters between the measured distance and the actual required distance. This error range is used as the standard to define whether the leveling is successful. If the actually measured gap falls within ±2 mm around an ideal set value, it is considered an acceptable leveling result.

[0072] The working principle of an automatic leveling method for a conveyor-type 3D printer provided by the present invention is as follows: After the system is powered on, the threshold calibration module is automatically activated. The threshold calibration module accurately calibrates the threshold during the data processing process according to the preset calibration algorithm and calibration data. During the printing leveling process, when the nozzle touches the magnetic heat-absorbing bed, the deformation detection module converts the deformation into an electrical signal for output. The signal comparison module receives the electrical signal output by the strain gauge deformation detection module and compares it with the preset initial threshold, and outputs corresponding high and low level signals. The data processing module receives the high and low level signals output by the signal comparison module, judges the contact state between the nozzle and the heated bed according to the change of the signal, and sends the level to the adjustment module. The adjustment module receives the adjustment instruction and controls the motor to drive the print head to move up and down to achieve automatic leveling.

[0073] Embodiment 2

[0074] The present invention also provides an automatic leveling device for a conveyor-type 3D printer. Refer to Figure 4 As shown, it is applied to the above leveling method. The leveling device is assembled on the printing platform of the printer at a 45° angle to form a 45° point-line contact between the print head and the printing platform. The leveling device includes a first-direction moving mechanism and a second-direction moving mechanism. The first-direction moving mechanism is assembled onto the second-direction moving mechanism, and the print head is assembled on the first-direction moving mechanism. Moreover, the first-direction moving mechanism can move along the conveying direction of the second-direction moving mechanism, that is, the print head can move upward at a 45° angle to achieve height adjustment. At the same time, the print head can move horizontally along the conveying direction of the first-direction moving mechanism to adjust the horizontal position, and finally complete the cooperation to realize 3D printing.

[0075] In this embodiment, both the first-direction moving mechanism and the second-direction moving mechanism are conveyor belt structures. The first-direction moving mechanism and the print head are installed on the conveyor belt of the second-direction moving mechanism, and the height adjustment is realized by moving at a 45° angle along with this conveyor belt. The print head is installed on the conveyor belt of the first-direction moving mechanism, and the horizontal position adjustment is realized by moving horizontally along with this conveyor belt.

[0076] Refer to Figure 1 As shown, the leveling device further includes:

[0077] Induction sheet 1, which is assembled on the print head;

[0078] The strain gauge 2, where the strain gauge 2 is connected to the upper end of the sensing sheet 1;

[0079] The control board 3, where the control board 3 is installed on the print head and electrically connected to the strain gauge 2 to receive the voltage signal output by the strain gauge 2;

[0080] The motor, where the output end of the motor cooperates with the print head through a linkage assembly to achieve the upward or downward movement of the print head.

[0081] This linkage assembly, which is also the second-direction movement mechanism, realizes height adjustment through the 45° movement of the conveyor belt.

[0082] Reference Figure 2 As shown, the control board 3 specifically includes:

[0083] The threshold calibration module, which is used to calibrate the preset threshold based on the preset calibration algorithm and calibration data to obtain the initial threshold.

[0084] The deformation detection module, which is used to obtain the contact pressure between the nozzle and the heated bed through the deformation of the sensing sheet and transmit the contact pressure to the strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge.

[0085] The signal comparison module, which compares the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the distances at multiple points based on the comparison algorithm to obtain a comparison result. Among them, the comparison result is represented by a high level or a low level.

[0086] The data processing module, which is used to determine the contact state between the nozzle and the heated bed according to the obtained comparison result of high level or low level. Specifically:

[0087] If the comparison result is low level, it indicates that the contact state is not in contact.

[0088] If the comparison result is high level, it indicates that the contact state is in contact, and an adjustment amount is calculated according to this contact state by using a data processing algorithm, and an adjustment instruction is generated at the same time.

[0089] The adjustment module, which is used to control the print head of the printer to act according to the adjustment amount based on the adjustment instruction to achieve automatic leveling. Among them, the actions include the upward or downward movement of the print head.

[0090] The control board further includes:

[0091] The signal amplification module, which is used to perform signal amplification processing on the voltage signal output by the strain gauge.

[0092] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0093] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. This program can be stored in a computer-readable storage medium, which includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disc memories, magnetic disc memories, tape memories, or any other medium that can be used to carry or store data and is computer-readable.

[0094] It should also be noted that the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity, or device. Without further limitations, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity, or device including the element.

Claims

1. A method for automatic leveling of a conveyor-type 3D printer, characterized in that: The leveling method comprises the following steps: Calibrate the preset threshold value based on the preset calibration algorithm and calibration data to obtain an initialization threshold value; The contact pressure between the nozzle and the hot bed is obtained by the deformation of the sensing sheet, and the contact pressure is transmitted to the strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge; Comparing the received voltage signal converted by the strain gauge with the initial threshold formed by detecting the multi-point distance based on the comparison algorithm to obtain a comparison result, wherein the comparison result is represented by a high level or a low level; The contact state between the nozzle and the hot bed is determined according to the comparison result of the high level or the low level obtained. Specifically, if the comparison result is a low level, it indicates that the contact state is no contact. If the comparison result is a high level, it indicates that the contact state is contacted, and the adjustment amount is calculated according to the contact state using a data processing algorithm, and an adjustment instruction is generated at the same time; Based on the adjustment instruction, the print head of the printer is controlled to move according to the adjustment amount to achieve automatic leveling, wherein the action includes raising or lowering the print head; The data processing algorithm adopts a median filtering algorithm; The comparison algorithm adopts a differential comparison algorithm; Before comparing the voltage signal converted by the received strain gauge with the initial threshold formed by the detection of the multi-point distance based on the comparison algorithm, it also includes: Performing signal amplification processing on the voltage signal output by the strain gauge; The raising or lowering of the print head is achieved by a motor.

2. An automatic leveling device for a conveyor-type 3D printer, applied to the leveling method described in claim 1, characterized in that: The leveling device comprises: A sensor chip, wherein the sensor chip is mounted on the print head; A strain gauge connected to the upper end of the sensing gauge; A control board, the control board is mounted on the print head and is electrically connected to the strain gauge to receive a voltage signal output by the strain gauge; A motor cooperates with the print head through a linkage assembly to achieve the rise or fall of the print head.

3. The automatic leveling device for a conveyor-type 3D printer according to claim 2, characterized in that: The control panel comprises: A threshold calibration module, used to calibrate a preset threshold based on a preset calibration algorithm and calibration data to obtain an initialization threshold; A deformation detection module, used for obtaining the contact pressure between the nozzle and the hot bed through the deformation of the sensing sheet, and transmitting the contact pressure to a strain gauge connected to the sensing sheet, so as to convert the contact pressure into a voltage signal through the strain gauge; A signal comparison module compares the voltage signal converted by the received strain gauge with the initial threshold formed by detecting the multi-point distance based on a comparison algorithm to obtain a comparison result, wherein the comparison result is represented by a high level or a low level; The data processing module is used to determine the contact state between the nozzle and the hot bed according to the comparison result of the high level or low level obtained, specifically: If the comparison result is a low level, it indicates that the contact state is no contact. If the comparison result is a high level, it indicates that the contact state is contacted, and the adjustment amount is calculated according to the contact state using a data processing algorithm, and an adjustment instruction is generated at the same time; The adjustment module is used to control the print head of the printer to move according to the adjustment amount based on the adjustment instruction to achieve automatic leveling, wherein the action includes raising or lowering the print head.

4. The automatic leveling device for a conveyor-type 3D printer according to claim 3, characterized in that: The control panel also includes: The signal amplification module is used to amplify the voltage signal output by the strain gauge.

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