Re: [CAD_CAM_EDM_DRO] Re: VFD question

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@...>
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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