3D (three dimensional) printer controller and 3D printer control method

Abstract

The invention provides a 3D (three dimensional) printer controller and a 3D printer control method; the 3D printer controller consists of a MCU (microprogrammed control unit) and a FPGA (field programmable gate array); the MCU is used for control of motion control calculation and a man-machine interface, and is connected with a human-computer interaction external interface or an external device through a data line; the FPGA is used for timing logic generation and printing equipment control, and is connected with an interface or equipment used for print control through a data line. Compared with the 3D printing technology in the prior art, the machining precision is improved, the processing speed is improved, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the electromechanical field, in particular to a 3D printer controller and a method for controlling the 3D printer. Background technique [0002] 3D printer, a machine of rapid prototyping technology, is a technology based on a digital model file, using bondable materials such as special wax, powdered metal or plastic, to construct objects by layer-by-layer printing. It is often used in mold making, industrial design and other fields to make models or for direct manufacturing of some products. [0003] One of the more popular 3D printers is the RepRap, which has a degree of self-replicating ability and is able to print most of its own (plastic) components. RepRap is the abbreviation of (replicating rapid prototyper). All materials of this prototype from software to hardware are free and open source. [0004] However, the existing open source 3D printer REPPAP and its derived models have the following problems: Slow pro...

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Problems solved by technology

[0004] However, the existing open source 3D printer REPPAP and its derived models have the following problems: Slow processing speed: REPPAP and its derived models have slow printing and processing speeds, and it takes 4-6 hours to process an object within 1 cubic decimeter. Complete; the printing accuracy is low, and there are obvious stacking traces; the connection between the movements is not tight, causing serious impact on the equipment; there is no speed planning for the movement between instructions, which is easy to cause movement impact, equipment vibration, workpiece overprocessing, etc. Problems: the stepping driver has weak driving ability (driving current below 1.5A), and cannot drive the print head to move at high speed; the control system circuit is complicated and the reliability is poor; the software operation is complicated and the user experience is poor

[0005] The existing 3D printing controller usually directly controls the motor driver through the timer of the open source Arduino control board to control the motor driver, but it has the following disadvantages: the frequency of the timer pulse is low, so the motor speed cannot be increased, which affects Processing efficiency; there is a large time gap between instructions and instructions, so there is vibration in the motor movement, affecting the processing accuracy, and in severe cases, steps will be lost; since there is only a USB slave interface (this interface is simulated as a serial port on the PC , instead of being simulated as a U disk), so to copy files to the board, it must be operated through the auxiliary software on the PC, which is complicated to use; multi-machine operation is not possible, that is, one computer controls multiple 3D printers to work remotely, which is not suitable Large-scale processing and use; the expansion performance is not strong, with a maximum of 2 print heads

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