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在实际测量中,有必要确定机械的一个环节绕固定轴线往复转动有限角度α时其工作机件的相互位置。这种机械示于图1,其上的托架2绕轴线1往复转动α<90°角,轴线1可以借助气浮支承、滑动支承和摆动支承实现。其中必须确定主轴11的垂直度偏差、a_1和 a_2的位移方向和主轴11的轴线相对于轴线1相交偏差,以及主轴
In actual measurement, it is necessary to determine the reciprocal position of a working machine when a link of a machine rotates back and forth about a fixed axis at a limited angle α. This machine is shown in Fig. 1, on which the carriage 2 is reciprocatingly rotated by an angle α <90 ° about an axis 1. The axis 1 can be achieved by means of air bearing, sliding bearing and oscillating bearing. In which it is necessary to determine the deviation of the verticality of the main shaft 11, the displacement direction of a_1 and a_2 and the deviation of the axis of the main shaft 11 with respect to the axis 1, and the main shaft