stepper motor question

hi chaps (if anyone is still here)

When you turn a stepper motor with no current flowing it resists turning. Anyone know what that property is called?

Also, is there such a thing as a stepper motor which doesn't resist turning hen no current is flowing?

eg a stepper attached to a ballscrew moving an axis on a machine - put a handle on it - can you get a proper feel to the motion, or do yuo have to put up with the lumpiness?

ta

Peter Fairbrother

Reply to
Peter Fairbrother
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Cogging or detent torque?

In the same way you can get moving iron motors that don't exhibit these characteristics, I see no reason why there shouldn't be a stepper motor with similar properties.

However, this really isn't my field.

Reply to
Mike Perkins

They do exist:

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seemingly with improved microstepping.

Reply to
Mike Perkins

Cogging?

Reply to
Peter Parry

Cogging

Reply to
Gareth's Downstairs Computer

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