Motorized spindle is the recent ten years will appear in the field of nc machine tool spindle and the spindle motor with new technology, it is the "core" of high-speed CNC machine components, its performance directly determines the high speed machine tool performance.Motorized spindle has compact structure, light weight, small inertia, small vibration, low noise, the advantages of fast response, can reduce the gear transmission, simplify the machine tool design, easy to implement the spindle positioning, is an ideal structure of high speed spindle unit.Electric spindle for high-speed CNC machine tool is the most key components, its performance depends to a large extent determines the whole sets of high-speed machine tools machining precision and production efficiency.
    Work is not only high speed motorized spindle, and requires high Angle velocity and Angle acceleration reduction, in the specified location must stop quickly, it is the structure design, manufacturing and control put forward very strict requirements and bring a series of technical problems, such as heat dissipation of motorized spindle, lubrication and precise control, etc.In the design, it is necessary to properly solve these problems, in order to ensure the high speed of the spindle is stable and reliable, high precision machining.Motorized spindle as the core component of machining center, it will close 2 for one, machine tool spindle and ac servo motor shaft of the spindle motor stator and rotor directly into the interior of the spindle component, and through the accurate dynamic balancing correction, have good rotation accuracy and stability, forming a perfect high speed spindle unit, also known as the built-in motorized spindle, it no longer USES the belt gear transmission, so as to realize the "zero transmission" of machine tool spindle system, electricity directly drive the rotor spindle after operation.
   Because the electric spindle is high speed precision components, regular maintenance is necessary.Motorized spindle regular maintenance is as follows:
1. Motorized spindle axial runout general requirement of 0.002 mm (2 microns), test 2 times a year.
2. Motorized spindle taper hole inside the radial runout of general requirement of 0.002 mm (2 microns), test 2 times a year.
3. The electric spindle mandrel distal radial runout (250 mm) general requirements for: 0.012 mm (12 microns), test 2 times a year.
4. Dish up force of spring leaf and requirements for: 16 ~ 27 kn test 2 times a year.
5. When the pull rod pine knife out of distance as follows: 10.5 + / - 0.1 mm test 4 times a year