Development, Research And Application Of Open Architecture Computer Numerical Control System Based On Industrial Personal Computer

The open architecture computer 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.This dissertation realizes one open architecture computer numerical control system for three axis numerical control engraving and milling machine using computer software, hardware and DSP technologies. This system is one PC-DSP principal and subordinate frame. PC means one industrial personal computer. DSP implies on GE400 multi-axis motion controller made by Googol Technology (HK) 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 Visual C++ for Windows and Lex & Yacc to accomplish the human-computer interaction interface and the original NC code 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, code 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, Visual C++, DSP used by this dissertation are all very popular in the application study field. This adapt to the trend of the open architecture computer numerical control system and it makes this design more practicability, lays a good foundation for the further development of this system..