Exploitation And Study Of Open Architecture Three-axes Cnc System Based On Windows

CNC system updated continuously with the rapid development of electronic technology, computer technology and automatic control technology. The sixth age of CNC system, a new one that adopts open architecture and is based on PC, emerged in recent years. In the future, CNC system will make for high speed, high precision, intelligentization and network informationization.However, there are many drawbacks in the open architecture CNC system at present, for example, the operation system is DOS platform in the mass, so it's difficult to share various of software and hardware resources. Additionally, the interface isn't intuitional enough; operation isn't easy enough; stability, reliability and the ability of opening are not good enough. The paper is written on purpose of solving the problems mentioned above and the system is an open architecture CNC milling and drilling system with three axes association based on PC and windows 98, which can perform almost intact functions such as NC-code editing, compilation, proofreading, simulation of figure of tool nose paths, real time control and HTML help. This system's hardware adopts DSP-embedded controller, which canprocess digital signal independently. The controller communicates with PC by accessing memory. On the side of controller, C language is used to write the interpolation program and the interruption service program, while on the side of PC, Visual C++ is used to write programs in which functions of editing NC-code, real-time control and human-machine interaction interface is fulfilled. The whole exploitation and study follows the technology route of from the easy to the difficult, from basis to extension and from appliance to optimization. Moreover, many high technologies such as time-lapse data collecting, windows animation drawing, real time monitoring and software PLC, etc., are used initiatively in this system.The exploitation and study of this system have got great success, compared with the ones of the same type, this system is more open and more easily used to merge with CAD and CAM, it runs stably, is convenient to be maintained and the interface is friendly and intuitional. Its usage can be grasped quickly. According to the input information, it can automatically display different properties of NC codes in different colors, and zoom in or zoom out the figure of tool nose paths dynamically. In addition, the system can work well not only when it works independently but also when windows performs multi-task, any other windows appliance programs can run freely with the system, not necessary to worry it will influence the machining. The controller can continue the process even after the operating system of PC is switched off. Both software control panel and hardware operating panel can be used to control the machine tool.Certainly, the system still exists many drawbacks, for example, the ftmction of the integrated interface oriented CAD/CAM software and thetool nose compensation isn't perfect enough. The function of resuming at the interruption caused by power cut and the function of programming by CNC macro-command are also blank. All these questions are bound to be solved gradually in the future.At last, this paper puts forward that the further study is to install video equipment on PC so as to monitor the real image and realize network manufacture and remote trouble diagnosis as well as to develop the CNC system employing digital servo-DC and servo-AC motors, which help to form a series of commercial products.