Based on a nc machine tool, the coordinate system, reference point and their relations are analysed. Several useful presetting cutter methods are also presented in this paper.
以数控车床为例，分析了数控机床使用中各种坐标系、参考点及其相互关系，从实用角度介绍了几种常见的对刀方法。
This paper analyses the principles of presetting cutter in CNC machining, and puts several routine methods of presetting cutter, and use typical examples to illustrate these.
分析了数控加工的对刀原理，讨论了常用的几种对刀方法，并用典型实例加以说明。
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