Compilation technique of inner-circle macro program

As the function of CAD/CAM is becoming more and more powerful, the use of macro program in NC programming has been underestimated. In fact, the macro program in NC machining has an irreplaceable advantage. This paper expounds the ideas of inner-circle macro program with SIEMENS. Two different tool paths of conventional inner-circle milling and spiral inner-circle milling are used to program the inner-circle macro program. It has been widely applied in practical machining.