Re: VFD ??

One reason is that the VFD will spin all motors conected at the same
speed. only individual VFD's can make the lathe at full speed and
the mill at half at the same time.

Second, you lose the over current protection. say you use a 15hp VFD
for your 3hp mill and 7hp lathe AND change the setting when you swap
connections. only one connected at a time.

if you do it the one kitten ka-bootle way, you must size it for 10hp
and if you are only running the mill..... no protection.

Speed can be controlled with some input of a potentiometer or
something so remote speed control is available. makes it easy to
switch machines and not have to move things around. just swap the
inputs with a relay.

Dave





--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ron Kline <godsone@e...>
wrote:

>
>
>
> >Ron,
> > You're absolutely right, it will work great. The only

problem is, if

> >you want to change the speed on the mill, and the VFD is at the

other end of

> >the garage, it's not very convenient. I'd rather have individual

controls.

> >
> >Marv Frankel
> >Los Angeles
> >
> >
>
> This seams to be a much better solution than a rotary phase

converter

> for the shop .
>
> Ron K
>
> >
> >