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  • 10月 21, 2020
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As we all know, servo motors have high precision, small size, fast speed and so on. It is also widely used, servo motor applications only speed control and position control two. The analysis then analyzes how to select the appropriate planetary gearbox for both applications.
Speed control.
The servo motor itself can be adjusted, but if the servo motor speed is too low, it will also cause some bad phenomena such as jitter to the servo motor. At this point, a suitable planetary gearbox needs to be selected. First, we select a planetary gearbox and need to determine the deceleration ratio. There’s an easy way:
Divide the rated speed of the motor by the speed you want to output and get the deceleration ratio you want. Planetary gearboxes also have many speed ratios. Find a relatively close, low cost, high precision and meet the requirements of the speed ratio.
After choosing the deceleration ratio, the next step is to choose the right type of gearbox, because the planetary gearbox model has a high cost, choose a smaller and afraid of the gearbox can not bear.
Here’s another way:
The output torque is to multiply the motor torque by the speed ratio, and then refer to the bearing torque of the planetary gearbox, as long as it is within the bearing torque range of the planetary reducer, there will be no problem.
Position control.
Brushless motors are self-changing (self-directional conversion) and therefore more complex to control.
Position control has higher performance requirements for the selection of planetary gearboxes than speed control. Mainly in the precision control. In order to achieve precise position control, there are many aspects involved. First, the accuracy of the matching planetary gearbox can meet the requirements. If the accuracy is not achieved, precise positioning cannot be achieved. Secondly, whether the matching planetary gearbox can meet the stability of long-term operation, whether it can achieve long-term operating gap will not become longer, and whether the inertia of planetary gearbox equipped with servo motor can meet the requirements. Whether you want to stop can stop, these will directly affect the accuracy of position control.
The high-quality transmission planetary reducer uses a dual support structure to ensure the stability of high-precision long-term operation, and the unpolar accuracy can reach within 3 arc points. As for inertia, it depends on the specific model speed ratio.

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