Is there an unbalanced rotation of the motor?
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After the motor is powered off, the rotor coasts to a stop and then reverses at an angle of about 30 degrees. Can the above analysis prove that the rotor is unbalanced (sliding bearing)?
I think it should exist, but just judging the imbalance by stopping and then reversing is still a bit... It should be sent to a professional institution to test the dynamic and static balance issues!
Did you perform status monitoring on the motor when it was not stopped? What was the result?
Did you perform status monitoring on the motor when it was not stopped? What was the result? If it is not balanced, there should be a reaction in its vibration displacement and sound!