Development Of Open Architecture NC Test Platform Based On Field Bus

High-speed and high-precision (HSHP) research is the foundation of the research on high performance NC technology. In order to study on HSHP NC technology, testing analyzing platform facing on HSHP motion control is needed first. Therefore, aiming at the demands required by HSHP machining of NC system and the drawbacks of existing NC system, this paper focuses on researching on HSHP technology and designs an open architecture NC test platform based on field bus for experiments of HSHP motion control algorithm. The following is the main content.First, NC testing platform which also works as proof scheme for up-down architecture NC system is studied, Hardware structure of the experiment platform is constructed, and software platform based on Linux system is introduced into the experiment platform.Open interface for testing motion control algorithm is needed by HSHP motion control experiments,this paper designs open architecture motion-control interface by which motion-control algorithm is opened to users, so users can easily test and adjust algorithms for the best performance. Furthermore the research on motion-control is considered as the foundation contributed to the implement of whole software NC system in the future.Communication between control system and servo system is based on serial data transfer. So communication technology based on field bus is studied and applied to meet the communication need. A communicant method based on CAN field bus is adopted to improve data transmitting capability of HSHP experiment system. Open architecture of the system is achieved by using field bus for communication; the reliability of the testing platform is also improved.Sampling system is required by motion control of field apparatus and analyses for the performance of the control system. And higher qualities of sampling system are demanded by HSHP system. So High-frequency sampling system is developed. Sampling function, storing function and analyzing function are integrated in this system. The accomplishment of this system cuts down the shortages in high frequently continuing sampling and storing of native sampling system,and provides an analyzing platform for HSHP experiments.Finally, Experiments based on practical projects are designed to proof the feasibility of the NC testing platform.