I acquired two large bipolar stepper motors a couple of years ago. One, I briefly dismantled and then put back together. Now, when I come to use them, the one I took apart doesn't work, and when I rotate the shaft manually, I can't 'feel' the steps. It's just really smooth.

I know that the driver works as it works with it's identical twin which I didn't take apart. A brief glance inside both motors seems that no bits have gone missing...

Any Ideas what part of the stepper I may not have put back right or is it an electrical problem?


1 Answer 1


You probably (mostly) demagnetized the rotor. It's a nice paperweight now.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.