HM-145X spindle part is of the direct drive technology, which uses built-in motor direct drive to the machine so that the length of the transmission chain is shorted to zero. the machine tool to achieve "zero transmission." The spindle motor and machine spindle are combined into one. As a result, he spindle components are relatively independent from transmission system and machine overall organization. At the same time, this kind of "direct-drive spindle" is of advantages of a compact body, light weight, inertia, vibration, low noise, fast response, etc., and high speed. Speed can be controlled in 3000--12000R/min. The electronic spindle not only make drive chain more simple, but also better to improve the dynamic performance of machine tools.
Vertical milling machine structure determines the spinlde up and down along the column. Although Z axis with brake function, because the weight of the spindle head itself impact a force on a vertical column downward, the connection pact of column and spindle will be slightly deformed and easy to pull the parts of the motor brake bad without integrated/ balance weight. Therefore, designers take integrated/ balance weight into account to solve this problem. This Moveable Weight Technology makes the pull forces from the front and back of the column equal, inssures the machine precision and protects the brake parts of the motor at the same time.