Development And Research On Open System Of Three Axis Numerical Control Milling Machine

The open numerical control system appeared in 1990s is a kind of advanced structure with excellent extension, convenient maintenance, good stability in operating and flexibly adaptability to different requirement. It is the future trends of the numerical control technology. With the rapid development of the technologies of the computer, the electronics and the modern control, it becomes more and more necessary to develop the modern CNC system cheaply and quickly with these advanced technology.This dissertation realizes one open computer system for three axis numerical control milling machine using computer software, hardware and DSP technologies. This system is one PC-DSP principal and subordinate frame. PC means one general personal computer. DSP implies on MCT8000F4 multi-axis motion controller made by Shenzhen Motion Technology Co. Ltd. The plant controlled is one simulation for milling machine consisted of three sets of servo motor and driver driving one worktable.The principal software utilizes C++ Builder for Windows and Lex&Yacc to accomplish the human-computer interaction interface and the original NC mode compilation module; through the upper and lower communication agreement, the principal machine commands are transmitted to the subordinate DSP motion controller. Parameter setting, milling cutter radius compensation, mode compilation, manual and automation operation, etc. are the tasks of principal PC, while line and arc interpolation, motion segment acceleration and deceleration control at a high precision rate and so on are the duty of DSP motion controller.The Lex&Yacc, C++ Builder, DSP used by this dissertation are all very popular in the application study field. This adapt to the trend of the open numerical control system and itmakes this design more practicability, lays a good foundation for the further development of this system.