The dynamic balance skill of high-speed motorized spindle is the key to the dynamic function of the motorized spindle. The vibration, noise (mechanical noise), bearing precision life, etc. under the running state of the fine high-speed motorized spindle are all directly related to the concave and convex of the dynamic balance accuracy.

Generally, in the initial planning stage of the electric spindle, it is necessary to analyze the vibration mode of the rolling parts of the shafting first. With the method of accounting machine CAD, combined with many experience data and the initial parameters of the relevant rolling parts such as bearings, all the rolling parts (including the shaft, bearings, front and rear bearing compression nuts, rotary joints, pull rods, tools, etc.) are cut by the method of mass blocks and overlapped in the accounting program, According to the direction and size of the axial force or radial force on the spindle under the practical working condition, the same force on the spindle should be overlapped to participate in the accounting program. In this way, the results of a shaft vibration mode can be obtained through the accounting machine. The results include bearing precision life, static stiffness, dynamic stiffness, etc., which can provide an important reference for the planning of high-speed electric spindle. The process should be completed at the beginning of the planning task. After calculation, we can adjust our planning scheme according to the actual vibration mode, and adjust the vibration mode by increasing or decreasing the bearing span, reducing the mass of the extension end accessories, and reducing the motor rotor size, so as to obtain the structure and results we need.