1　故障现象移动操作面板上的轨迹球时,显示器上的游标符号不随之移动,致使测量取值无法完成。2　故障原因轨迹球使用频繁,造成带动斩光盘转动的海绵滚严重磨损,使轨迹球与海绵滚之间空隙增大,接触面减小,甚至接触不上,从而造成游标符号移动困难、操作失灵。3　检修过程首先要? 1 Fault phenomenon When you move the trackball on the operation panel, the cursor symbol on the display does not move, making it impossible to complete the measurement. 2 Causes of Trackball Frequent use of the trackball causes the sponge roll that drives the disc to wear heavily. As a result, the gap between the trackball and the sponge roll increases, the contact surface decreases, and even the contact cannot be reached. As a result, movement of the cursor symbol is difficult and the operation fails. . 3 The repair process first of all?