Selection and parameters of servo motor reducer

We introduced the installation of servo motor reducer last time. Today we mainly talk about the selection and parameters of servo motor reducer. The reducer is a new industrial reducer with a wide range of uses. Compared with other reducers, servo motor reducers have high rigidity, high precision (single-stage can achieve within 1 minute), (double-stage can achieve within 3 minutes), and high transmission power (single-stage can achieve within 95%-99 %), high torque/volume ratio, lifetime maintenance-free and other features. Because of these characteristics, reducers are installed on stepper motors, servo motors or brushless motors to reduce speed, increase torque, and match inertia.

The parameters are introduced as follows:

1. Reduction ratio: the ratio of input speed to output speed.

2. Number of series: the number of sets of TBT planetary scalloped teeth. Generally, it can reach level two, and the power will decrease.

3. Full load power: The transmission power of the reducer under load (fault stops output torque).

4. Working life: The cumulative operating time of the reducer under extra load and extra input speed.

5. Extra torque: It is the torque that the extra life allows for long-term operation. When the output speed is 100 rpm, the life of the reducer is the average life. When this value is exceeded, the average life of the reducer will be reduced. The reducer will malfunction when the output torque exceeds twice.

6. Noise: unit decibel dB (A), this value is measured when the actual input speed is 3000 rpm, without load, and 1 meter away from the reducer.

7. Hysteresis: Fix the input end so that the output end rotates clockwise and counterclockwise. When the output end bears an additional torque of plus or minus 2%, the output end of the reducer will be displaced by a tiny angular displacement. This angular displacement is the return stroke. Gap, also called "back gap". The unit is "minute", which is 1/60 of one degree.

Reducer selection:

1. Confirm that the additional torque of your load is less than the additional output torque of the reducer.

2. The extra torque of the servo motor * reduction ratio is greater than the extra torque of the load.

3. The moment of inertia converted from the load to the servo motor through the reducer must be within the allowable range of the servo.

4. Confirm that the accuracy of the reducer can meet your control requirements.

5. The structure and dimensions of the reducer can not only meet the equipment requirements, but also be connected with the selected servo equipment.