Development of the Numerical Control System for Large Ultra-precision Lathe-milling Machine Tools Based on PMAC

The open numerical control system of the large ultra-precision lathe-milling machine based on industrial PC and PMAC board was introduced.The hardware structure,the principles of control and communication,and the software functions were described.The programming of the system control software was also introduced.The machine equipped with the system has ultra-precision positioning and perfect tracking ability,so that it adapts to machining large ultra-precision components.