FDM type 3D printer stepping motor speed control device and drive control system

Abstract

The invention discloses an FDM type 3D printer stepping motor speed control device. The FDM type 3D printer stepping motor speed control device comprises a communication bus, a communication bus interface and four stepping motor control channels, all of which are sequentially connected. Each stepping motor control channel is internally provided with an FIFO parameter cache, a register file and a speed control module, wherein motion data parameters are stored in the FIFO parameter cache through the communication bus and the communication bus interface, and the speed control module reads related parameters from the FIFO parameter cache and calculates related stepping motor control information and sends out the related stepping motor control information to a stepping motor. The register files are internally provided with all control registers controlling the stepping motor speed control device and used for controlling running of the stepping motor speed control device. The invention further discloses an FDM type 3D printer drive control system using the stepping motor speed control device. The stepping motor is controlled through a hardware calculation and synchronous drive manner, and the control speed and system stability of the motor drive system are effectively improved.

Description

technical field [0001] The invention relates to the field of stepping motor motion control, in particular to a stepping motor motion control device and a drive control system for a Fused Deposition Modeling (FDM) 3D printer. Background technique [0002] A 3D printer is a machine that implements rapid prototyping technology. It uses special wax, powdered metal or plastic and other bondable materials based on digital model files to construct objects by layer-by-layer printing. The digital model file contains all information of the constructed object, such as the shape, size and placement of the object, the height of each layer when printing layer by layer, the movement direction and speed of the printing head when printing each layer, etc. Fused lamination (FDM) 3D printers use plastics as printing materials, and use the fusion process to print layer by layer according to the control instructions on the digital model file to form objects. When working, the printer prints lay...

AI Technical Summary

Problems solved by technology

This time-sharing movement method can only move one axis at a time, so it will greatly reduce the movement speed of the print head, which is not conducive to the speed increase of the printer.

[0004] In summary, the existing FDM 3D printer stepper motor speed control adopts the timer counter interrupt control and Bresenham algorithm software processing method, although it can well control the operation of the stepper motor and realize speed control, but due to There is a bottleneck in program execution time in this implementation method and the Bresenham algorithm is a time-sharing driving algorithm, which controls the print head by time-sharing driving, which makes it impossible to further increase the printing speed of the actual printer, and there is a large speed error between the actual printing speed and the set speed. Low printing efficiency also greatly affects the stability of the system

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