RE: [CAD_CAM_EDM_DRO] Re: Step motor current

--- In CAD_CAM_EDM_DRO@onelist.com, "Tim Goldstein" <timg@k...> wrote:

> > step motors run hot specialy when stoped,but not to hot or it

will

> > desmagnatize.If you can't hold it with bare hands than lower the
> > courrent.
> > Hope it helps.
> > Fogassa.
>
> Using what you can hold with your bare hands as a measure is

probably being

> very conservative. I just double checked some of the motors I have.

The

> instructions with a Vexta NEMA 23 says to keep the outer case under

100 deg

> Centigrade and if temps are higher to use fans for cooling. The

Superior

> NEMA 34 with an encoder says the rear end bell of this encoder

equipped

> motor is not to exceed 100 deg Centigrade and the plate has the

temperate

> rise marked as 65 deg centigrade so if you are starting at room

temp you

> will expecting temps around 100 deg Centigrade. No, I don't run any

of them

> that hot, but my point is most steppers I have seem are rated to a
> temperature that I wouldn't even want to touch much less hold.

Agreed you

> get little reduction in torque if you drop from the maximum

amperage, but

> the safety margin temperature wise is there.
>
>
> Tim
> [Denver, CO]
>
> timg@... <mailto:timg@...>
> http://www.ktmarketing.com

OK!
It was conservative,I just moved to a new apartment,and could not
find the motors data sheet or anything related to my retrofit.Today
I've got some time to do so.
To the motors I've got 109 oz/in the outer surface should not exceed
+ 212F