关键词: 数控, 五坐标, 插补

Abstract: According to the piinciple of rotaion of coordinate system, an interpolation algorithm with which the circular ares in an arbitrary plane can be implemented in real time is presented in the paper. With this algorithm CNC can make all kinds of circular arcs and its performance is improved. The main requirements of an interpolation subroutine are couputing accuray and rapidity, that is. the computing time must be shorter than the sampling period of the system, and a period of time is left to do data procession and to collect the information on running and state of the machine tool. The interpolation algorithm is tested by using C laguage. A computer whose CPU is intel 8088 is used with afrequency of s megahertz and its duration of time to finish one interpolation compuiting is about 5-6 ms which is acceptable for actual CNC. Therefore this interpolatin algorithm is feasible.

Key words: CNC, 5 axis, interpolation