Question to Mariss about demagnetion was Re: Torque when usin

So can the rotors be remagnetised easily at home?
If so what procedure would you suggest?

or would I need to remove each end housings one at a time fit new bearings and replace without removing the rotor itself from the stator. Bit fiddly mechanically but seems possible.

Regards
Bob Thomas

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "krnldmp <krnldmp@y...>" <krnldmp@y...> wrote:
> The permanent drop in flux density happens before you even get the
> rotor all the way out of the stator. The rotors are magnetized while
> they are in the stator and must stay there or be re-magnetized.
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "echnidna <echnidna@y...>"
> <echnidna@y...> wrote:
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis
> <mariss92705@y...>" <mariss92705@y...> wrote:
> >
> > > .... Regarding your motor. Check carefully to see if it has not
> been
> > > disassembled. Look for marks on its screws. A step motor that has
> had
> > > its rotor removed from the stator can lose a lot of its rated
> torque
> > > due to demagnetization.
> > >
> > > Mariss
> >
> > Mariss, I assume dismantling a stepper motor and leaving it that way
> for some time could demagnetise it.
> >
> > but would dismantling a stepper for a short time to fit new bearings
> be likely to cause any significant loss of magnetism
> >
> > Regards
> > Bob Thomas