(2) An NC code compiler was designed, in which the cutting parts files composed of NC code were read first, then the lexical and grammatical analysis for the NC procedure in the case of NC rulemaking were done, error handling was started in the reasonable situation, and the DMC control commands were generated at last.

According to the compiler’s requirement from the open CNC system based on motion controller , an in-depth study to NC code compiler is maked , a NC code compiler applicable to open CNC system is developped , and compile function is realized .

The design of check error module of NC code translator;