The Development Of CNC System Based On PMAC To Thread Grinding Machine Tool

NC machine tool is widely used for its high efficiency and well machining precision in modern production. It reduces the workers'labor intensity and brings considerable economy profits to us too. Especially people can run it in a scientific and modern way. Based on this principle, the thread grinding CNC system has been developed. The system called the distributed-dual CPU structure adopts the industry PC(IPC) and the programming multiple-axis controller(PMAC);IPC and PMAC are the control center of the system which completes Panasonic AC servo motor, servo control units and encoders etc. In order to realize the function of PMAC multiaxial movement, Relevant I/O commutators were enlarged in PMAC board. The development of CNC system consists of PMAC its own hardware and software. An open-architecture hardware system and software system are mainly separated into some function modules with standard interfaces. These function modules will work coordinately. The CNC system discussed by this paper is a real time and multitask control system. It can deal with coding interpretation, servo control and system management simultaneity and process various model high pressure glass pipe. Not only it haves the function of general commercial CNC system, but also it has some special functions such as inputting screw thread parameter, compensating wearing grinding wheel, selecting model etc. At the same time, Not only the kernel controller of CNC system based on PMAC controller shortens the exploitive cycle, achieving resource rational configuration, but also the CNC developer and the customer can increase or decrease the function modules according to their requirements, and bring their technologies, experiences and skills into the open CNC.