[TheForge] cutting 1/4 copper

Wed Apr 13 12:48:13 EDT 2005

Hey Kevin,

I have a 1/2" capacity plasma..........;-)

Ray
Cincinnati

> 
> From: "Kevin D" <flyinpig at go-concepts.com>
> Date: 2005/04/13 Wed PM 12:11:16 EDT
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Subject: RE: [TheForge] cutting 1/4 copper
> 
> Grover,
> 
> Just looked this up on; http://store.cyberweld.com/milspec625.html  for a
> MILLER SPECTRUM 625 PLASMA CUTTER
> 
> 
> Quick Specs: Spectrum 625
> Rated Cutting Capacity Rated: 1/2 in (13 mm)
> Quality: 5/8 in (16 mm)
> Sever: 7/8 in (22 mm)
> Rated Output 40 A at 140 VDC, 50% duty cycle at 40? C / 104? F
> Plasma Gas Flow/Pressure 6 CFM at 75 PSI or 170L/min at 517 kPa
> Weight Net: 57 lb (26 kg)
> Ship: 60 lb (27 kg)
> 
> Kevin
> 
>  -----Original Message-----
>  From: theforge-bounces at mailman.qth.net
>  [mailto:theforge-bounces at mailman.qth.net]On Behalf Of Grover Richardson
>  Sent: Wednesday, April 13, 2005 8:20 AM
>  To: 'Sponsored by ABANA'
>  Subject: RE: [TheForge] cutting 1/4 copper
> 
> 
>  Just curious, how much extra Voltage does it take?
> 
>  -----Original Message-----
>  From: theforge-bounces at mailman.qth.net
>  [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Steve Smith
>  Sent: Wednesday, April 13, 2005 8:09 AM
>  To: Sponsored by ABANA
>  Subject: Re: [TheForge] cutting 1/4 copper
> 
> 
>  You need to bribe someone who either has a 1/2" plasma cutter (cuts half
>  as much on copper) or a big shear.
> 
>  Plasma cutters are way more complex than a welder. They also have higher
>  open circuit voltages. Making one gets discussed regularly on
>  rec.crafts.metalworking if you want to dig up more detail. The consensus
>  is always that it is thoroughly impractical and difficult.
> 
>  Steve
> 
>  Kevin D wrote:
> 
>  > Dave,
>  >
>  > Actually a friend has a plasma cutter that he brought over.  I suppose
>  > it was one capable of 20 ga. steel.  It was cute to watch that little
>  > arc just sit there and hum...don't know what size plasma it would
>  > take.
>  >
>  > On a similar vein, I was browsing a used machinery website and noticed
>  > a plasma cutter that was billed as able to be a stick welder as well.
>  > Does anyone have any idea of a conversion for my old Hobart Truarc 250
>  > to plasma cut?  Not being familiar with plasma, I'd assume that copper
>  > would take more juice than steel?  I'm not particularly inclined to
>  > invest in a plasma cutter, but wouldn't mind rigging my compressor and
>  > buzz box to effect the deal.
>  >
>  > Kevin
>  >
>  >  -----Original Message-----
>  >  From: theforge-bounces at mailman.qth.net
>  > [mailto:theforge-bounces at mailman.qth.net]On Behalf Of magichammer
>  >  Sent: Tuesday, April 12, 2005 11:29 AM
>  >  To: Sponsored by ABANA
>  >  Subject: Re: [TheForge] cutting 1/4 copper
>  >
>  >
>  >  plasma cutter
>  >
>  >  dave m
>  >
>  >  Kevin D wrote:
>  >
>  >  >How about a redsmithing question to break the lull?
>  >  >
>  >  >Last year a local scrap yard had some copper for sale, so I  bought
>  > a couple  >hundred pounds at $1/lb.  So a buddy of mine would like a
>  > chunk out of a  >~4'x5'x 1/4" plate that I'd bought.  We spent an hour
>  > and a half chiseling  >down both sides until it was scored and work
>  > hardened enough to  lay it on a
>  >  >4x4 and jump on it to break it along the chisel line.
>  >  >
>  >  >We'd tried setting up a fence and cutting it with a sawzall, but
>  >  it wouldn't
>  >  >cut straight.  The blade flexed too easily, perhaps too much pressure?
>  >  >Anyway, anyone got any better ideas on how to cut out pieces?
>  >  >
>  >  >Kevin Donahoe
>  >  >Flying Pig Forge
>  >  >Morrow, OH 45152
>  >  >flyinpig at go-concepts.com
>  >  >
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