On Wed, 3 Oct 2018 at 18:29, Roland Jollivet <roland.jolli...@gmail.com> wrote:
> > >> Well, the first thing to do is put the motor shaft in your >> machine spindle and turn it at a known RPM. >> (Make sure to have the motor case secured in a vise or >> whatever, to prevent it spinning on you.) >> Then, measure the voltage at the motor terminals. That will >> give you the KV constant, Volts/thousand RPM. If the >> voltage is pretty low at 700 - 1000 RPM, then most likely >> the rating is not a real MAXIMUM. >> I can't imagine why the motor would fly apart at only 700 >> RPM. But, maybe it has a high KV, and they don't want to >> run excessive voltage on the commutator. >> >> Jon >> >> > It's a 3-phase PM motor, no commutator. So does the KV constant method > still apply? Maybe load it with a few hundred ohms to damp it a bit? > Ha ha, silly me. Of course no need to 'damp' it. I was thinking of those old high ohms steppers. Just measured, it's only 2.2 ohms each phase. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
