Bearing reducer mechanism works

Gear is widely used as a mechanical transmission, a variety of machine tools in almost every drive gear. In the CNC servo feed system uses gear transmission has two purposes. First, the high-speed torque servo motor (such as stepper motors, DC and AC servo motors, etc.) change the output of low speed high torque actuator input; another is to make the ball and table moment of inertia in the system has a smaller proportion of secondary school. In addition, the open-loop system can ensure the required precision of movement.
To minimize the backlash of CNC machining accuracy, often in the structure to take measures to reduce or eliminate the empty drive gear error. If the wrong gear tooth dual-chip method using eccentric adjustment gear center distance or using axial shimming method to eliminate the backlash.
 Compared with the use of synchronous belt in CNC machine tool feed drive chain using gear reduction, easier to produce low-frequency oscillations, thus reducing mechanism often configured dampers to improve dynamic performance.
 Timing belt is a new belt drive. He used the toothed belt and pulley tooth meshing teeth sequentially transmit motion and power, and thus both belt drive, chain drive gear and advantages, and no relative sliding, the average transmission more accurate, high transmission accuracy and toothed belt high strength, thickness is small, light weight, it can be used for high-speed transmission. No special tensioning toothed belt, so the role of the shaft and the bearing load is small, the transmission efficiency is high, is now widely used in CNC machine tools. Timing belt main parameters and specifications are as follows:
    1) pitch pitch p is the pitch line of two adjacent teeth in the distance. As strong layer of the same length at work, so strong layer centerline is defined as toothed belt pitch line (neutral layer), and the perimeter of the pitch line L as the nominal length of toothed belt.
    2) Modulus Modulus is defined as m = p / π, the toothed belt size calculated a main basis.
    3) Other parameters Other parameters toothed belt and size involute rack basically the same. The formula toothed belt tooth involute rack with different because toothed belt pitch line in a strong layer, rather than the tooth high school.