Open Architecture of CNC System Based on STEP-NC Data Model

A kind of novel open architecture CNC system is put forward based on the key hardware ‘‘PC+PMAC controller’’. The intelligent CNC system is divided into four layers, the field bus is used in it for openness and interoperability. The system software including several functional modules is developed based on COM for reuse and reconfiguration. The proposed open CNC system is based on STEP-NC data model, which aim to provide higher-level information for process control. The framework presented can be used as a reference for STEP-compliant CNC.