Re: stepper motors

There is a danger disassembling stepper motors!

The ones with permanent magnets in the rotor are magnetised in situ within
the stator or in a 'keeper' and transferred into the stator during
manufacture. If you remove the rotor from the stator and then return it you
will find that the motor is less powerful than it was. I did this very
thing. I extended the rear shaft for a handwheel and that particular motor
is now weak. Does anyone know how to remagetise it?

Bob

At 09:17 1/07/99 -0800, you wrote:

>From: John Grant <grantjoh@...>
>
>Bob Bachman wrote:
>
>> A question on diassembling stepper motors. I seem to recall reading
>> warnings of
>> bad things happening to stepper motors if they are taken apart. Any

thoughts

>> on this or is my less than reliable memory faulty again?
>
>Your memory is fine, BUT you have to look carefully at the details on
>this warning from Superior Electric.
>
>They are talking about talking the *rotor* apart. I do not know why
>anyone would want to do this, but I can understand that it would not be
>good for the motor.
>
>John Grant
>