Multiform faults that occur in the process of returning to the reference point in NC machine tool was analyzed, diagnosed and concluded, and provide a reference for excluding the faults.
针对数控机床回参考点过程中各种形式的故障进行分析、诊断及总结，给数控机床回参考点过程中的故障排除提供参考。
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。
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