Each link of motorized spindle maintenance is very critical. The result of maintenance is directly related to the subsequent service life. The following is the teacher's disassembly of each link of high-speed spindle maintenance. Spindle disassembly and evaluation 1. Testing the resistance and grounding of the stator of the spindle motor 2. Dismantling the spindle completely and cleaning the dismantled parts 3. Measurement of components: a. Measuring the inner diameter of the bearing B. Measuring the accuracy of the outer diameter of the bearing with the outer diameter micrometer C. Vertically measuring the concentricity of the inner diameter and outer diameter of the bearing D. Testing the concentricity of the rotor E. Straightness of the shaft Straightness 4. Evaluate all spring components inside the spindle 5. Inspect and evaluate the spindle chuck 6. Inspect the taper surface of the spindle and check the concentricity 7. Inspect the taper surface of the spindle 8. Assess the bearing failure analysis 9. Provide the functional maintenance quotation of the inspection sensor to the customer for installation 1. All components must be thoroughly cleaned and corroded 2. Installation components need to be polished when necessary 3. Stator must be cleaned up, if resistance value is unstable, new stator must be replaced. Component installation must keep concentricity and verticality 5. Rotor installation and rotor dynamic balance correction 6. Installation of new O-ring 7. Bearing pitch ring must be correctly installed between bearings 8. Installation of new bearings. Installation of spindle motor immediately after bearing seal removal, otherwise time is one. Long, bearing will be polluted by dust, leading to bearing grease failure. 9. Tool retention set 10. Conical precision grinding adjustment 11. Air leakage phenomenon in cooling system 12. Spindle motor enclosure keeps smooth 13. Maintenance test of spindle motor's overall dynamic balance correction 1. When spindle is placed in test station, it is necessary to monitor the speed, power, current and temperature of spindle. 2. Vibration acceleration, displacement and vibration of spindle as a whole. The quality report of spindle test should be sent to customer A together with spindle. Each spindle should carry out this process B. Compliance with manufacturer's tolerance specification C.ISO/ANSI G-0.4 quality grade evaluation D. All bearings must conform to ABEC4-9 grade evaluation.