Re: VFD question

Stan.
A VFD is a Variable Frequency Drive that's often used to convert
1 Phase power to 3 Phase, but it does much more. It also acts as a
speed controller, giving you the capability of dialing in speeds. It
replaces the need for a phase converter, but gives you far more
versatility, in a very small box. If you go into Google, or another
search engine, and search for VFD, you'll get a better idea of what's
available.

Marv Frankel
Los Angeles


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Stan Aarhus" <saarhus@a...>
wrote:

> Sorry, I have come to this thead late, and have only one newby

question.

> What is the VFD?
>
> Stan A.
>
> ----- Original Message -----
> From: "mayfieldtm" <mayfiet@i...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, April 21, 2004 9:44 AM
> Subject: [CAD_CAM_EDM_DRO] Re: VFD question
>
>
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Marv Frankel"
> > <Dcdziner@p...> wrote:
> > > John,
> > > I should have explained further that I do not start, stop, or
> > > reverse the mill, with the original switch.
> >
> > Switching the motor on/off with the original switch could be a
> > problem for the VFD. For that matter, any switch between the VFD

and

> > the Motor can be a problem.
> > On my Lathe I rewired the Main Switch, Hi/LO Switch, Emergency
> > Switches, Break Switches, Lever Switches, Reversing Switches and

all

> > that stuff, to low voltage control to the VFD.
> > This allowed me to keep all the original switching controls and

most

> > importantly if I had not done so, I would not trust myself from
> > losing presence of mind and... well you know.
> > The electrical box looks almost empty as I was able to remove

many of

> > the Control Relays that were no longer needed. (No Relays are good
> > Relays)
> >
> > Tom M.
> >
> >
> >
> >
> >
> >
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