1. When selecting planetary reducer, the reduction ratio should be determined first.

2. After determining the reduction ratio, please multiply the rated torque of the servo motor you choose by the reduction ratio. In principle, the value obtained should be less than the rated output torque of the similar reducer provided in the product catalog. At the same time, the overload capacity of the drive motor and the maximum working torque required in practice should also be considered. The required maximum working torque is less than 2 times of the rated output torque. After meeting the above conditions, please choose the smallest reducer with lower cost.

3. Next, consider the return clearance of planetary reducer. The smaller the return clearance, the higher the accuracy and the higher the cost. Users need to choose a series of reducers that meet the accuracy requirements. Lateral / radial forces and average life should also be considered. The reducer with large lateral / radial force has high reliability in installation and use, and is not easy to cause problems. Generally, the average life of the servo motor is much longer than that of the servo motor.

4. Finally, you should consider the weight of the motor. A kind of reducer is only allowed to be matched with the motor with a certain weight. If the motor is too heavy, the input flange of the reducer will be damaged if it runs for a long time.