设计分析了柱面光栅精密角度分度系统中的主轴轴系,阐述了角度分度系统中双轴轴系的设计原理及结构组成,给出了相应的双轴零位对准方法及主轴角度分度测量方法。轴系经安装调试后,得到了当主轴转动一个周期时柱面光栅角度分度实验数据输出曲线。实验结果表明,该轴系达到了所要求的测角精度和分辨率。 Design and analysis of the spindle axis system in the precision angular indexing system of the cylindrical grating, the design principle and structure of the two-axis system in the angular indexing system are expounded, the corresponding methods of zero axis alignment and spindle angle Indexing measurement method. After the shaft system is installed and debugged, the experimental data output curve of the cylindrical grating angle indexing is obtained when the spindle rotates one cycle. The experimental results show that the shaft system achieves the required angle accuracy and resolution.