Re: [CAD_CAM_EDM_DRO] Re: Servo motors with Geckos get hot when idle.

tig415 wrote:

> > One other possibility is that you have binding or tight spots in the
> > screw or machine, and the servo drive is trying to move the encoder
> > just 1 or 2 counts, but the machine is resisting that move. The loop
> > gain is not high enough to break the friction at that point, and so
> > the drive applies moderate current to the motor, and it just sits
> > there. If the motor has a lot of armature resistance, it will get hot
> > in this stalled condition. (This is why I recommend using motors
> > with the lowest possible resistance for servo drives.)
>
> No tight spot at all
> >
> > What motors and encoders are you using?
> >
> > Jon
>
> I'm using some surplus motors I got from dan mauch with US Digital encoders.

Umm, that doesn't tell me very much. What is the voltage and current rating of the
motors? What is their size? What belt reduction to the leadscrew do you have
(if any) and what thread pitch is the leadscrew? What size machine?

What is the DC power supply voltage? What is the armature resistance
of the motor?

Jon