Dsp-based Multi-axis Motion Controller

The traditional NC(Numerical Control) system is based on a kind of closed architecture. Such architecture makes most of present NC systems not adaptable to the changes and competition of manufacturing industry. It can not either meet the requirement of the development of modern manufacturing toward an information-based and agile model. Therefore, it is an inevitable tendency that the architecture of NC system be open. Motion controller plays a very important role in NC system, so this tendency of open NC system will definitely give rise to new generation motion controller. Based on open NC system, this paper mainly discusses motion controller and implements the design of step motor controller using DSP.In chapter one the evolution and the present situation of NC system are introduced, the open architecture of NC system is analyzed in detail. The role of motion controller in NC system and the research and development of motion controller are demonstrated.Chapter two focuses on the principle and composition of motion controller, step motor and servo- motor are discussed respectively. Also, the servo system of NC system is studied.Chapter three devotes to the key technology of motion controller. Control bus, Micro-electronics, control theory and algorithm, and their application to motion control are fully discussed. ~The architecture of DSP and its application in motion control system are presented in chapter four. In the end of this chapter, the necessity and advantage of using DSP as the key processor in motion controller are given.For the development of NC engraving machine, chapter five designs a 3-axis step motor motion controller. The implementation of the software and hardware of the controller is discussed in detail.Based on the analysis of the recently developed NC engraving machine, the application of DSP-based motion controller for the machine is mainly conducted in chapter six. The program of motion control is implemented.In the end of this paper, a conclusion of the study on DSP-based motion controller is given, and the prospect of motion controller is presented.