Based On The Research And Development Of The Pc's Open Architecture Cnc System

Modern manufacturing technique is developing towards automation, high speed, high precision, flexibility, intelligence, systematization and integration. However, the traditional NC is hard to meet the special needs of users and of the second development. The new NC ------open-architecture CNC system just adapts to the situation.Aimed at the disadvantage of traditional NC and the need of making over the old equipment of the Institute of Machinery Manufacturing of CAEP, the necessity of research and development of open-architecture NC is put forward. Firstly, the contents, characteristics, function and structure of open-architecture CNC system are set forth. What's more, the architecture of hierarchy and modularity is constructed. Secondly, through the analysis of the structure of the open-architecture CNC system, the scheme based on IPC and motion controller is brings forward. Hardware structure of master-slave open-architecture CNC system based on IPC and PMAC motion controller is built, in which industrial computer acts as master computer and PMAC motion controller acts as slave one. The communication between master computer and slave one is achieved by ISA bus and DPRAM. Mechatronics installation of the Institute of Machinery Manufacturing of CAEP is constructed. The form and structure of the system, the trait of the IPC, PMAC and DPRAM are expounded. Subsequently, software function of the system is batted around, the theory of MDI(Multi-Document Interface) of it's software system is dissected, and the PComm32 is introduced. Finally, the application programs named for PmacNc of the entire system is developed by VC++6.0, which is consisted of initialization communication interface, manual operation interface, parameter intercalation interface, status messages interface and program compiling interface. Eventually, motion control programs are compiled and tested. Some thoughts about how to develop open-architecture CNC are put forward.