The machining accuracy of CNC gantry grinder is often abnormal in production. This kind of fault is hidden and difficult to diagnose. There are five main reasons for such failures:

(1) The feed unit of the machine tool is changed or changed.

(2) The zero offset of each axis of the machine tool is abnormal.

(3) The axial backlash is abnormal.

(4) The motor operation status is abnormal, that is, the electrical and control parts are faulty.

(5) Mechanical failure, such as screw rod, bearing, shaft coupler and other components. In addition, the preparation of machining programs, the selection of tools and human factors may also lead to abnormal machining accuracy.