圆工作台的旋转精度主要决定于圆导轨的不平直度,在工作中则反映为旋转过程中工作台面的倾斜。一般的检验方法是用水平仪,把它放于工作台面上,转动工作台,观测在不同角度处水平仪产泡位置的偏移。但这样测量时,工作台的安装水平误差、水平仪的0位误差和工作台面对旋转中心线的不垂直度误差 Round table rotation accuracy mainly depends on the circular rail is not straightness, in the work is reflected as the rotation of the work surface tilt. The general method of testing is to use a spirit level, put it on the work surface, turn the workbench, and observe the offset of the bubbler’s position at different angles. However, such measurements, the level of the table installation error, the level of 0 bit error and the table on the rotation center line of the non-square error