Three-dimensional (3D) printer, and closed-loop control system and control method for printer forming platform

Abstract

The invention belongs to the field of three-dimensional (3D) printing, and particularly relates to a 3D printer, and a closed-loop control system and control method for a printer forming platform. Thecontrol system comprises a main controller, a motor driver, a closed-loop stepping motor, a ball screw driving mechanism, the forming platform and grating rulers, wherein the ball screw driving mechanism is formed by building two ball screw straight-line modules which are mutually independent and mutually perpendicular, and realizes X-Y direction driving through a ball screw pair and a linear guideway pair; the forming platform is fixed onto a nut seat; the nut seat is connected with a lead screw nut; the closed-loop stepping motor is connected with the main controller through the motor driver; the rotational motion of the closed-loop stepping motor is transformed into the linear motion of the forming platform through the ball screw driving system; and the grating rulers are adopted as position feedback elements, are parallel to linear guideways in X and Y directions, and feedback actual displacement information of the forming platform to the main controller, so that the closed-loop compensation is realized, and the printing precision of a forming piece is improved.

Description

technical field [0001] The invention belongs to the field of 3D printing, and in particular relates to a 3D printer, a closed-loop control system and a control method of a printer forming platform. Background technique [0002] 3D printing, also known as additive manufacturing, is based on digital model files and uses adhesive materials to construct objects by printing layer by layer. It is different from traditional processing technology. In 2009, it was defined as "a process that, as opposed to subtractive manufacturing, uses 3D model data to connect materials to construct objects, usually in a layer-by-layer accumulation manner." The most prominent advantage of 3D printing is that it can directly generate parts of any shape from computer graphics data without machining or any molds, thereby greatly shortening the product development cycle, improving productivity and reducing production costs. [0003] FDM, fused deposition modeling technology, is a kind of 3D printing te...

AI Technical Summary

Problems solved by technology

At present, the forming platform mostly adopts the open-loop control method, and the driving method adopts a stepping motor, which makes it impossible for us to know whether the stepping motor is out of step in the uniform speed stage of point movement and the speed-up stage of starting, and whether it is overstepping at the end, and motion positioning The accuracy is not high, and the printing quality cannot be guaranteed

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