| The open numerical control system appeared in 1990s is a kind of advanced structure with excellent extension, convenient maintenance, good stability in operating and flexibly adaptability to different requirement. It is the future trends of the numerical control technology. With the rapid development of the technologies of the computer, the electronics and the modern control, it becomes more and more necessary to develop the modern CNC system cheaply and quickly with these advanced technology.Having flexible software and hardware, The CNC (Computer Numerical Control) system of Open Architecture is convenient to renewed and therefore suitable for FMS and CIMS circumstance.Based on the object-orient analysis of CNC system, the paper proposes a design idea of master-slave CNC system, which builds with PC as upper chip and motion controller with DSP as lower chip. On the design of hardware, which use MCT8000F4 motion controller purchased by market and Japanese SINANO AC servo system. The environment of PC-DSP master-slave CNC system is set up with the best use of the hardware resource of a PC computer itself .Maths model of AC servo system and PID control are studied. On the design of software, in the windows environment, this paper realizes the DIY of software in the design method of modularization structure by the development tool of C++ Builder, which materializes the basic idea of open system structure. Based on the structure design of CNC system, first, the paper develops the structure for communication between upper chip and lower chip and program the explanation module of CNCS by MCT8000F4 motion control board's dynamic link library, finishes the human-computer interface with the technology of windows programming.It based on the theory and practice applying the methods of position control builds up the open numerically controlled mill system. It integrates the agility of PC and the high speed of calculation of the DSP, which is the direction of the future development of open CNCS.
|
PDF Full Text Request