Re: why not just change the motor?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Brian" <ka1bbg@w...> wrote:

> Hi, sometimes a 3 phase motor is rewound for single phase, but very
> expensive, many motors cannot be changed. a 1-200 dollar

inverter/vfd/static

> is cheap by 800 dollars..over a rewind job..cul brian f.

okay, so IF it could be rewound for 800 (i think that's high, it's
cheaper in houston, but they have about 50 rewind shops about here)
that would elimenate VFD noise, RSC (rotary static converter) issues,
and some shielding issues with PC based control systems..

on "as strong".. that part I don't see, as many low HP (3 and under)
machines are offered to be able to be wired either way, or am I just
reading the marketing materials wrong?


Or, heck, let's get to the heart of the issue, if *I* bought a 2 hp
boss 8 cnc, 3ph, I would NOT bother with a vfd on it.. i would get the
wiring and motor from a 2 hp 220 1ph , and bolt it on... and yeah, I
would spend DOUBLE or more for that simple solution, rather than
kludge it, knowing I am introducing unknowns into a pc-cnc/enc setup.


thoughts?
jeffe

> ----- Original Message -----
> From: "jlsmith269" <jlsmith269@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, January 22, 2004 9:03 PM
> Subject: [CAD_CAM_EDM_DRO] Re: why not just change the motor?
>
>
> > let me show my ignorance... what, exactly, makes a 3ph different?

if

> > it's cap and windings, can't the 3ph be rewound to 1 ph?
> >
> > just my rambling thoughts, and thanks for listening
> >
> > jeffe
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Brian" <ka1bbg@w...>

wrote:

> > > ok if you have belt drive type like "M" or "J" head as for the

rest

> > its
> > > special housing. cul brian f.
> > > ----- Original Message -----
> > > From: "jlsmith269" <jlsmith269@y...>
> > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > Sent: Thursday, January 22, 2004 10:22 AM
> > > Subject: [CAD_CAM_EDM_DRO] why not just change the motor?
> > >
> > >
> > > > I had an interesting thought...
> > > >
> > > > if you have a 3ph motor, on say a bridgeport, and there ARE
> > hassles
> > > > involved with the VFD/or other phase convertor, as well as

price,

> > why
> > > > not replace the motor and wiring with a single phase 220?
> > > >
> > > > jeffe
> > > >
> > > >
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,

> timg@k...
> > Moderator: pentam@c... indigo_red@q... davemucha@j...
> [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to

reach it if

> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this to

be a

> sister site to the CCED group, as many of the same members are

there, for OT

> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING

THEM.

> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
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> > Yahoo! Groups Links
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