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介绍了在ＶＡＸ３１００工作站上开发的计算机图形数控编程ＧＮＣ（ＧｒａｐｈｉｃａｌＮｕｍｅｒｉｃａｌＣｏｎｔｒｏｌ）系统。它具有一般零件的二维造型及三维曲面造型功能，可以根据不同的加工要求制定出粗、精数控加工轨迹。并能进行三轴、五轴数控铣削的加工动态模拟及自动进行后置处理
The GNC (Graphical Numerical Control) system developed by VAX3100 workstation is introduced. It has the general part of the two-dimensional modeling and three-dimensional surface modeling capabilities, according to different processing requirements to develop a coarse, fine CNC machining trajectory. And can be three-axis, five-axis CNC milling dynamic simulation and automatic post-processing