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由以上分析,从原理、装配、精度等方面来说球轴系具有一些优点,可是其加工工艺和测试方法比较困难。我们先分析1″目镜分度头的整球轴系(如图一),其大球的前球瓦和小球的后球瓦都只是以端面和螺圈端面接触,并传递受力。主要受力的是大球的后球瓦和小球的前球瓦,而轴系的精度也是由这两个球瓦、钢珠及大、小球体的不圆度及其相互配合所决定的。因此去除大球的前球瓦和小球的后球瓦以后,对精度不会有影响。即变整球
From the above analysis, from the principle, assembly, accuracy and other aspects of the ball shaft has some advantages, but its processing technology and testing methods more difficult. We first analyze 1 "eyepiece indexing head of the entire ball system (Figure 1), the ball before the big ball and the ball after the ball is only to the end face and the coil end contact, and transmitted force. The force is the big ball’s rear ball and the ball before the tile, and the accuracy of the shaft system is also determined by the two ball tile, ball and large, small ball of non-circularity and their interaction. After removing the big ball before the ball and the ball after the tile ball, the accuracy will not have an impact.