On Mon, Nov 27, 2017 at 1:26 AM, John Dammeyer <[email protected]> wrote:
> I recall reading somewhere, and I can't remember where, that it's possible > to damage a stepper motor by running too much current through them. Not > because of overheating, (although that's a possibility), but because the > larger magnetic field produced by the increased current demagnetizes the > magnets. > > I spend a year trying to do this, and it didn't work. Baldor brushless servomotors. Had them up to the max case temp for hours per day, nothing happened to the magnets. I was impressed that the windings didn't fail being used as heaters like that. We have an algorithm that can detect it when it happens, fortunately the heat temporarily demagnitizes them to a slight degree. Now we have a pile of unused rotors sitting in a drawer. Eric Keller Boalsburg, Pennsylvania ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
