在机器安装调试中，对中找正是经常进行的工作， 它的作用是保证相邻机器的传动轴处于正确的位置。联接对中的基本条件是工作时，主轴和从动轴的回转中心重合，从而保证运动和动力的传递。但有时机器在安装找正时的状态与工作状态不一样，特别是机器温度的变化会引起机器传动轴 In the machine installation and commissioning, to find is the regular work, its role is to ensure that the adjacent machine shaft in the right position. The basic condition of coupling is that when working, the rotation centers of the main shaft and the driven shaft coincide, so as to ensure the movement and power transmission. But sometimes when the machine is looking for installation and working state is not the same, especially the machine temperature changes will cause the machine shaft