| CNC system is the core technology of NC machine. The traditional numerical control system is a closed system, its generality is poor, difficult to transplant and unable to realize network management. The CNC technology base on general PC also also involved in some problems, such as system resources can not be fully utilized, hardware can’t well meet the real-time requirements and no ready-made CNC system hardware modules, etc.Address the above problems, this paper did the research on key technologies of based on WindowsCE embedded system, using its high integration, small size, easy to expand and so on, developed a proprietary embedded CNC system, to meet the requirements of real-time and versatility. And added to the system error checking and real-time simulation capabilities, make it easy to operate and visualization. This study is going to cover four key aspects:1. Make functional requirements analysis of embedded numerical control system to determine its general framework. To meet requirement of multi-task and strong real-time, the author designed hardware platform and selected upper and lower digital controller for CNC system. In order to achieve the functional designed specifically CNC system software system, and completed it.2. Design decode module and tool compensation module. Decode module used the compile way to decode NC program, calls error checking module reads NC program for separation and check the NC program morphology and syntax. For complex NC program design appropriate subprogram error checking and decode modules to extend the software’s capabilities. Cutter compensation module use C function tool compensation algorithm encountered in actual machining contour offset calculations, simplifying procedures for the preparation.3. Examples validate the development of numerical control system decoder and cutter compensation module.At the end of thesis summarize the problems involved in CNC system and further improvement forthe future work is presented. |
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