Hi,
That VFD "sounds" like a Parajust (sp?) system - they were large and needed cooling. The VFDs used SCRs and the units at a client I worked with would kick off (electronic shearpin) when it got too warm.
We added an air line to each unit to flush out the hot air - it solved the problem.
The modern units are real small, work beautifully but you may need an extra college degree just get through all of the potential adjustments and features <smile>
Kind regards,
DBN
--- On Wed, 12/1/10, Nick Andrews <nickjandrews@gmail.com> wrote:
> From: Nick Andrews <nickjandrews@gmail.com>
> Subject: Re: [gingery_machines] value of a used BP mill?
> To: gingery_machines@yahoogroups.com
> Date: Wednesday, December 1, 2010, 10:04 AM
> My plan was to look at them and see
> if they can be swapped down to 240V
> operation as-is. I actually have a 480VAC VFD in my
> garage, but don't know
> if it works. It is in a cabinet about 3' tall by 2'
> wide by 1' or so
> thick! Came from a NMSU auction. Need to look
> around for a tranny with
> some of our subs who do electrical work, I guess...
> Plus, I can't even fit
> a mill in my garage at present! I have a 750lb
> centrifuge sitting on a
> trailer outside that I need to bring in for a vacuum
> station I want to
> build...
>
> On Wed, Dec 1, 2010 at 7:48 AM, Ron Thompson <ron@ourcadguy.com>
> wrote:
>
> >
> >
> > Hey Nick,
> >
> > Tree is a good brand. To me, the 480V is a deal killer
> unless it can be
> > rewired for 240. VFDs are nice, but I have never seen
> one output more
> > voltage than was input. Doesn't mean there isn't one,
> just make sure
> > before you base a buy decision on it.
> >
> > The motor may be proprietary, so swapping it may be a
> problem. Again,
> > verify it.
> >
> > Patience will save you money and usually get you a
> better machine.
> >
> > --
> >
> > Ron Thompson
> > On the Beautiful Florida Space Coast, right beside the
> Kennedy Space
> > Center, USA
> >
> > Sometimes you just gotta do what makes you
> smile.<GRIN>
> >
> > http://www.ourcadguy.com/
> >
> > http://www.plansandprojects.com My hobby
> pages are here:
> > http://www.plansandprojects.com/My%20Machines/
> >
> > Visit the castinghobby FAQ:
> > http://castinghobbyfaq.bareboogerhost.com/
> >
> >
> > On 12/1/2010 9:27 AM, Nick Andrews wrote:
> > > How about these:
> > >
> > > 1) Tree model 2UV upright metal milling machine
> with digital read out 480
> > > volts.
> > > 2) Tree model 2VG upright metal milling machine
> with digital read out 480
> > > volts.
> > >
> > > The guy wants $2000 each, negotiable. I am not
> familiar with Tree at all
> > > (not that I amm familiar with a BP either,
> really), but they have the
> > DROs
> > > already, which is nice. I may try to go see them
> this weekend and take
> > > pics. I think I could either swap motors out or
> maybe get a VFD to output
> > > 480 3ph or use a VFD for 240V 3Ph then a stepup
> tranny maybe?
> > >
> > > On Tue, Nov 30, 2010 at 10:24 AM, Kerri Duncan
> > > <silverforgestudio@yahoo.com
> <silverforgestudio%40yahoo.com>>wrote:
> > >
> > >>
> > >> Nick- figure the value of the weight in
> scrap- that is your bottom
> > dollar
> > >> price- if the machine is not workable it is
> just that- alot of scrap...
> > >> -The top price is dependant on what the beds
> and other things look like
> > and
> > >> if it runs true- nothing bent... a good
> estimate with a couple of old
> > timers
> > >> in my area was to price out a set of tooling,
> bushings, bearings and add
> > a
> > >> few bucks for machining the beds/ways and
> getting things trued up...
> > then
> > >> figure out what the time is worth to you to
> actually FIX everything...
> > to
> > >> working status, not mint. Take this cost OFF
> what a newer one without
> > >> tooling goes for (use gold machinery, e-bay,
> Auction-house whatever to
> > price
> > >> one in appraised good condition for the value
> $$$) and add a fudge
> > factor
> > >> and always add to the value the time spent in
> the actual re-build to
> > you.
> > >> -Do not get emotionally tied to it- its a
> tool... AFTER you put your
> > >> blood-sweat-mashed thumbs and skinned
> knuckles into the&$#@# thing...
> > THEN
> > >> its emotionally valuable!
> > >> -Your mileage may vary, batteries not
> included, some assembly required,
> > >> call your mother and all the usual
> comments... hope this helps
> > >>
> > >> --- On Tue, 11/30/10, Nick Andrews<nickjandrews@gmail.com<nickjandrews%40gmail.com>
> > <nickjandrews%40gmail.com>>
> > >> wrote:
> > >>
> > >> From: Nick Andrews<nickjandrews@gmail.com
> <nickjandrews%40gmail.com>
> > <nickjandrews%40gmail.com>>
> >
> > >> Subject: [gingery_machines] value of a used
> BP mill?
> > >> To: gingery_machines@yahoogroups.com<gingery_machines%40yahoogroups.com>
> > <gingery_machines%40yahoogroups.com>,
> > >> OpenLathe@yahoogroups.com
> <OpenLathe%40yahoogroups.com><OpenLathe%
> > 40yahoogroups.com>
> >
> > >> Date: Tuesday, November 30, 2010, 11:31 AM
> > >>
> > >>
> > >>
> > >>
> > >> Okay, I am looking for a price range on a
> used Bridgeport mill a guy has
> > >> locally on CL. He wants 2500 but says it is
> negotiable. I have not seen
> > >> it, but it comes with no tooling but has the
> 48 bed on it. Don't know
> > about
> > >> power feed kits, etc. Any idea on a range
> from poor to like new
> > condition?
> > >> Yeah, I know it's a tough question without
> seeing it!
> > >>
> > >> --
> > >> Nick A
> > >>
> > >> "You know what I wish? I wish that all the
> scum of the world had but a
> > >> single throat, and I had my hands about
> it..." Rorschach, 1975
> > >>
> > >> "They that can give up essential liberty to
> obtain a little temporary
> > >> safety
> > >> deserve neither liberty nor safety."-
> Benjamin Franklin, Historical
> > Review
> > >> of Pennsylvania, 1759
> > >>
> > >> "Suburbia is where the developer bulldozes
> out the trees, then names the
> > >> streets after them." Bill Vaughan
> > >>
> > >> "The price of apathy towards public affairs
> is to be ruled by evil men."
> > >> Plato
> > >>
> > >> [Non-text portions of this message have been
> removed]
> > >>
> > >> [Non-text portions of this message have been
> removed]
> > >>
> > >>
> > >>
> > >
> > >
> >
> > --
> >
> > Ron Thompson
> > On the Beautiful Florida Space Coast, right beside the
> Kennedy Space
> > Center, USA
> >
> > Sometimes you just gotta do what makes you
> smile.<GRIN>
> >
> > http://www.ourcadguy.com/
> >
> > http://www.plansandprojects.com My hobby
> pages are here:
> > http://www.plansandprojects.com/My%20Machines/
> >
> > Visit the castinghobby FAQ:
> > http://castinghobbyfaq.bareboogerhost.com/
> >
> >
> >
>
>
>
> --
> Nick A
>
> "You know what I wish? I wish that all the scum of
> the world had but a
> single throat, and I had my hands about it..."
> Rorschach, 1975
>
> "They that can give up essential liberty to obtain a little
> temporary safety
> deserve neither liberty nor safety."- Benjamin Franklin,
> Historical Review
> of Pennsylvania, 1759
>
> "Suburbia is where the developer bulldozes out the trees,
> then names the
> streets after them." Bill Vaughan
>
> "The price of apathy towards public affairs is to be ruled
> by evil men."
> Plato
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
> gingery_machines-fullfeatured@yahoogroups.com
>
>
>
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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