1. The rotation accuracy of the bearing should be improved:
① Select high-precision rolling bearings; ② Adopt high-precision multi oil wedge dynamic pressure bearing; ③ Adopt high-precision hydrostatic bearing
2. Improve the accuracy of bearing accessories:
① Improve the machining accuracy of box support hole and main shaft journal; ② Improve the machining accuracy of the mating surface with the bearing; ③ Measure and adjust the radial runout range of the corresponding parts to compensate or offset the error.
3. Pre tighten the rolling bearing properly:
① Clearance can be eliminated; ② Increase bearing stiffness; ③ Homogenize the rolling element error.
4. Make the spindle rotation accuracy not reflected on the workpiece
