Re: Servo issue

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Jason Cox" <sinergy@o...> wrote:

> Jon and all,
>
> Heres what I did. First swapped other motors on the same g320's

which worked

> fine, so Im assuming that it is the motor only.
>
> It spins freely with nothig connected but when I connected the

terminals as

> you said it felt smooth and consistent for whole rotations

clockwise, but

> when anti clockwise I can feel a very light cogging, it does not

however get

> easy in one part or the rotation.
>
> I did this same test on another motor and it was smooth both ways.
>
> I also tested the motor at 90deg intervals with no change in its anti
> clockwise weakness!
>
> If this motor has a high number of windings could this cogging when

turning

> be an open winding? But would I feel this in only one direction?
>
> The main thing is could this be the cause of my x axis going crazy?

Or could

> it have been my crazy x axis that drove itself into the stops and

overheated

> the motor?
>
> Could I be getting noise or something from the computer, this worries me
> cause all has worked fine for six months and nothing has changed

except that

> I overheated the motor but still which came first the chicken or the

egg?

>
> I hope this makes some sort of sense to you?
>
> Thanks for all of your help.
>
> Regards,
>
> Jason Cox.

Jason , You may have a problem with one of the brushes/holder. Could
be broke, loose etc. I'ld remove them and have a look. And do your
rotation test again with them removed.

Frank