Seting up the processing coordinate system is the precondition of automatic programming and processing ,which has a great influence on the accuracy of the numerical control program .In this paper ,two methods of setting up MCS-SPINDLE in the CAM UG8 .5 environment turning module for turning parts are described ,and the key points and the way of creating the model of turning parts in NX UG are given .%设置加工坐标系是自动编程与加工的前提条件，加工坐标系的设置对生成的数控程序的准确性有很大影响。阐述了轴类零件在UG8.5的CAM 环境车削模块中设置MCS-SPINDLE的两种方法，给出了在 UG NX中创建轴类零件加工模型的要点及思路。
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