1. The connection between the servo motor shaft and the lead screw is loose, causing the lead screw and the motor to be out of sync, resulting in dimensional errors. When testing, only need to make a mark on the coupling between the servo motor and the lead screw, and move the workbench (or tool holder) back and forth with a faster magnification. Due to the inertia of the workbench (or turret), the coupling will be Obvious relative movement of the two ends. This type of fault is usually manifested as the processing size changes in only one direction, and it can be eliminated only by evenly tightening the coupling screws.

2. Poor lubrication between the ball screw and the nut, which increases the movement resistance of the worktable (or tool post), and cannot completely execute the movement command accurately. Such failures are usually manifested as irregular changes in the size of parts within a few wires, and the failure can be eliminated only by improving the lubrication.

3. The movement resistance of the machine tool table (or tool post) is too large, which is generally caused by too tight adjustment of the inserts and poor lubrication of the machine tool rail surface. This failure phenomenon is generally manifested as irregular changes in the size of the parts within a few wires. The inspection can be carried out by observing the size and change of the position deviation of DGN800-804. Usually, the difference is large when the forward and reverse directions are stationary. Such failures only need to re-adjust the inserts and improve the lubrication of the guide rails.

4. The rolling bearing is worn or improperly adjusted, resulting in excessive movement resistance. This failure phenomenon is also usually manifested as an irregular change in size within a few threads. The inspection can be carried out through the position deviation of DGN800-804, and the method is the same as above. For such failures, only the worn bearings need to be replaced and carefully adjusted, and the failures can be eliminated.