A servo reduction motor is a device installed on a servo motor to reduce speed and increase torque. Its important parameters include reduction ratio, number of stages, full load efficiency, working life, rated torque, noise, etc. When selecting a servo reduction motor, it is necessary to consider comprehensively the calculation of output shaft torque, the calculation of maximum speed of the transmission mechanism, the selection of installation method of the transmission mechanism, the selection of transmission accuracy of the reducer, and the configuration of the reducer interface. Let's learn together how to choose a servo reduction motor.

What is a servo reduction motor

Servo reduction motor, also known as reduction servo motor, generally refers to a servo motor reducer installed on a servo motor to reduce speed, increase torque, match inertia, and has the characteristics of high rigidity, high precision, high torque, and maintenance free.

What are the parameters of the deceleration servo motor

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

Grade: The number of sets of planetary gears. Generally, the maximum level can reach three, but the efficiency may decrease.

Full load efficiency: The transmission efficiency of the gearbox under maximum load conditions (fault stop output torque).

Working life: The cumulative working time of the gearbox at rated input speed under rated load.

Rated torque: It is the torque allowed for long-term operation within the rated lifespan. When the output speed is 100 revolutions per minute, the lifespan of the gearbox is the average lifespan. If it exceeds this value, the average lifespan of the gearbox will decrease. When the output torque exceeds twice, the gearbox malfunctions.

Noise: Unit decibel dB (A), this value is measured at an input speed of 3000 revolutions per minute, without load, and at a distance of 1 meter from the gearbox.

3、 How to choose a servo reduction motor

In the selection process of servo motor reducers, the main attention is paid to the selection and calculation of the following parameters: 1. Calculation of reducer output shaft torque. The output torque of the reducer is the required torque calculated by us for the transmission mechanism. After you confirm the torque required by your transmission mechanism, then compare the torque of the servo motor you have selected. The ratio of these two torques is the reduction ratio of the reducer torque you want to choose. Of course, we usually make the final torque of the mechanism redundant, so the transmission ratio should be slightly larger.

Calculation of maximum speed of transmission mechanism

This parameter involves the selection of the reduction ratio of the gearbox. When we choose the reduction ratio, it does not mean that we can infinitely increase it, because the larger the reduction ratio, although the torque will be greater, it also means that the output speed will decrease, which leads to a decrease in the operating speed of the entire transmission mechanism. So, between torque and speed, we need to strike a balance by increasing the reduction ratio as much as possible to enhance the transmission torque while satisfying the transmission speed of the mechanical mechanism.

3. Selection of installation method for transmission mechanism

The type and installation method of servo motor reducer should also be considered, whether to choose planetary reducer or worm gear reducer, and whether the installation method is coaxial direct connection or 90 degree vertical installation.

4. Selection of Transmission Accuracy for Reducer

The transmission accuracy of the reducer depends entirely on the accuracy requirements of the transmission mechanism you design. As long as the corresponding parameters are matched according to your function, the higher the accuracy, the higher the cost.

5. Configuration of gearbox interface

In the process of selecting a servo motor reducer, there are two interfaces that need to be clarified. The first interface is the interface between the reducer and the servo motor, which usually needs to be customized. The reducer manufacturer will customize the interface of the reducer according to the interface of the servo motor selected by the customer. Therefore, when communicating with the reducer supplier, you need to provide them with the interface of the servo motor; The second one is the output interface of the gearbox. Generally speaking, we choose this interface according to the standards of the gearbox supplier, unless there are special requirements. The above is the relevant knowledge of servo motor reducer selection. When selecting, everyone should pay attention to selecting according to actual needs and consider cost factors.