When thestepper motorproduces noise, you must first confirm the source of the noise and then take appropriate solutions. The cause of the noise can be determined by:

1. Check whether the noise is caused by motor resonance.

Since the motor has a certain resonance area, using it in this speed range will cause the motor to resonate and generate noise. Therefore, for noise caused by resonance, try adjusting the motor speed to see if the noise improves. If so, avoid running the motor near the resonance area; when the motor accelerates from a lower resonance area, it should accelerate as quickly as possible and stay away from the resonance area.

What’s more, you can also add a shock absorber between the motor and the mounting part, such as a rubber or silicone coupling or a tuned mass damper, which absorb the motor’s vibration and reduce the resulting vibration.

2. Check whether the noise is caused by the motor itself.

It is impossible to eliminate the noise caused by the mutual contact of the mechanical structures during the rotation of the motor, but the noise can be reduced to a certain extent through some methods. For example, you can adjust the load or drive current to avoid noise caused by motor out-of-step (jump) due to too large (too small) load; you can also use subdivision drive to make the motor current change as close to a cosine curve as possible changes to reduce some noise caused by fluctuations in output torque caused by changes in current;

In addition, when the motor is in use, due to various reasons, the motor may be slightly deformed, causing the stator and rotor of the motor to contact and rub, causing noise. You can try to remove the motor and turn the motor shaft by hand to see if there is any jamming. If so, there is friction between the motor's stator and rotor. Please check the operating environment of the motor or contact after-sales service.

3. Check whether the noise is caused by other components near the motor.

There may also be noise from other components near the motor that may be mistaken for motor noise.

The inspection method is the same as above. If there is no jamming, the motor is normal.

Please check the condition of other components, find the source of the noise and solve it