Re: hi-freq motors[perske etc]

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

> carlcnc@y... wrote:
>
> > I run Perske and a Colombo hi-freq router motors on my cnc.
> > I have often wondered WHY ther are no US manf of this type
> > motor/spindle??
> > Surely it can't be cost vs sale price. Perske is from

Germany,Colombo

> > from Italy.
> > Seems to me that the European makers own the market.
> >
> > Perske,Elte,Colombo are the only ones readily available.
>
> How about Onsrud/Danly (BIG spindles) and Rockwell/Precise?
> The Onsrud is definitely made as a wood router, the Rockwell/Precise
> is made for internal grinding, but could be used for other purposes.
> Where do you get the inverters to run these motors? I have
> figured out how to use late-model VFD's that go to 400 Hz, but
> that limits spindle speed to 24,000 RPM.
>

Actualy Yaskava varispeed VFD in version G can output 1000Hz
, problem would be finding low cost motor which can handle this speed
even in 6 pole motor , I have tried to run 1000rpm 50Hz 6 pole motor
in 400 Hz and result was not so good !

-Mika

> Jon