Re: [CAD_CAM_EDM_DRO] Re: G201s repaired, now to bring up machine

On Wed, 2003-04-09 at 14:03, Mariss Freimanis wrote:

Mariss,

> This is really important. Having the same set of MOSFETs blow up in
> four seperate drives is a dead give away that there is a problem with
> the motor. The odds against that happening randomly are 1:256.

This is the conclusion I was starting to come to as well. I've been
sitting here thinking about the situation since I sent the previous
email.

Before any of this goes back together, I'll be bench testing with some
known good (read new) motors.

> Your motor may have a shorted turn. Shorted turns kill drives and
> usually cannot be detected with an ohmmeter.

Any tests that can be done? I have another motor I can throw in but
since these are surplus, there's no telling what may be wrong with
them. It may be time to bite the wallet and get new motors.

Chris