Closed-loop control system and method for photocuring rapid forming 3D printer

Abstract

The invention provides a closed-loop control system of a photocuring rapid forming 3D printer. The closed-loop control system comprises a rack, a Z-axis lifting system, a motor, a sliding block, a bracket, a work platform, a controller, a motor driver, a ruler and a reading head. The controller is connected with an electrical driver. The motor driver is connected with the motor. The reading head is connected with the motor driver or the controller. When the reading head and the motor driver are connected, the motor driver calculates the reading difference value according to the feedback reading value of the reading head to send correction pulses to the motor. When the reading head is connected with the controller, the controller calculates the reading difference value according to the feedback reading value of the reading head, and then the motor driver is controlled to send correction pulses to the motor. The reading head feeds the actual position reading value back to the controller or the motor driver, the controller or the motor driver sends the correction pulses to the motor after calculating the difference value between the actual position reading value and the theoretical position reading value, and the moving precision and the positioning precision of the Z-axis lifting system are guaranteed.

Description

technical field [0001] The invention relates to a 3D printer, in particular to a closed-loop control system and method for a light-curing rapid prototyping 3D printer. Background technique [0002] Additive Manufacturing (AM) technology is a technology that uses the method of gradually accumulating materials to manufacture solid parts. Compared with traditional material removal----turning, cutting, grinding and other processing technologies, additive manufacturing Manufacturing technology is a bottom-up manufacturing method, which is based on the discrete-accumulation principle and directly manufactures parts driven by the three-dimensional data of the part. In the past two decades, AM technology has achieved rapid development. AM technology is also known as rapid prototyping technology, 3D printing technology, and entity free manufacturing technology. AM technology first generates a 3D CAD solid model or surface model file of a product, and then converts the file into an S...

AI Technical Summary

Problems solved by technology

[0014] 1. There are machining errors in the screw nut mechanism, which will affect the lead accuracy of the lead screw. For example, if the lead of a certain section of the screw is 5.000mm, the other section becomes 4.992mm, or 5.011mm, or the gap affects the accuracy, so Affect the accuracy of the theoretical position stroke and reduce the positioning accuracy of the working platform;

[0015] 2. The controller sends pulses to the motor driver, but the motor driver is not fully executed. For example, the controller sends 2000 pulses to the motor driver, but the motor driver finally...

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