The machining accuracy of the machining center is directly related to the accuracy of the machining center machine tool. Some users find that the machining accuracy will be wrong after the machine tool has been used for several years. What should I do if this happens?

Let‘s talk about several reasons that affect the accuracy of the machining center:

1. XYZ axis reverse clearance compensation is incorrect

　2. XYZ loose to the main insert

　3. XYZ bearing is damaged

　4. Mechanical geometric accuracy deviation of the fuselage

　5. Axial and radial movement of the spindle

　6. Improper adjustment of system servo parameters and processing parameters

　7. Customer programming program error

　8. XYZ shaft screw, wire mother wear

　After finding the reasons that affect the accuracy, the corresponding solutions are listed:

　1. Correct reverse clearance with a dial gauge

　2. Adjust the tightness of the main inserts of each shaft, and adjust the load of the observation system to a good state

　3. Check the bearing condition, find abnormal noise or damage to the spindle, and replace it in time

　4. Use a marble angle ruler and a ballbar to detect the geometric accuracy of each item. If any deviations are found, they should be corrected

　5. Measure the accuracy of the spindle bore and check whether the spindle bearing is moving. If the moving clearance is too large, it should be replaced in time.

　6. Adjust the servo position loop, speed loop gain, load inertia ratio, machining accuracy coefficient, acceleration and deceleration time constant

　7. Professional optimization and adjustment of programming processes

　8. Screw clearance compensation with the help of a laser interferometer when conditions permit.

　It is believed that through this series of inspections and adjustments, the accuracy of the machine tool will be as good as ever. The accuracy of workpiece processing can also be guaranteed.