Re: How can you test a stepper ?

There has been much discussion on this list lately
about demagnetized step motors.

You can check by shorting all the motor leads together
(just twist them together) and rotate the motor shaft
with your fingers.

You should be able to feel the magnetic bumps.
The harder to turn, the better.

Just for fun, I've directly connected two step motors
together. (Black Lead to Black, White to White and so on)
Turning one motor by hand will turn the other in step.
OK, like I'm easily entertained.

Tom M.