On Fri, Sep 11, 2009 at 01:43:46PM +0100, Andy Pugh wrote: > 2009/9/11 Steve Stallings <steve...@newsguy.com>: > > If you turn them by hand, you will feel the 50 > > magnetic detents associated with the 50 poles. > > Presumably because the poles retain the magnetic polarity from last > time they were energised?
The soft iron poles have little hysteresis, I believe. Of the three types of stepper motors, two have permanent magnets. That seems to be confirmed by the power they output when used as generators to power LED headlights on bicycles. (In case we doubt wikipedia.) Erik ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
