Re: age old question

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:

> cnc_4_me wrote:
>
> >Les Newell has left many posts about his use of treadmill motors,

he

> >has not said anything about problems with smoothness or reversing

as

> >far as i know...Were did this question in performance come from...
> >
> >
> I know people were having excellent results using them as spindle

motors

> for mills and lathes. I didn't know about the use in positioning

servos.

>
> Jon

I know of an application on a very large aircraft spar milling
machine where the retrofit used flux vector drives with 3 phase
motors instead of servos. Of course, the drives are not exactly
cheap. The motors would seem to be though.

I wonder if anyone here has gone that route.