[TheForge] cutting 1/4 copper

[Kevin D]

Interestingly enough, this is the first plasma cutter I pulled out of the
hat, and it states
"Blow Back Torch Design - The plasma arc is created by pulling an electrical
arc between an electrode and tip. This process eliminates high frequency by
forcing an electrical arc between the two pieces."

So, I take it to mean this one starts at it's cutting v/a?  Also
interesting, is the speed cutting chart, at the 5/8"max capacity it cuts at
1-2 inches/min and 50% duty cycle.  Might have to take up smoking to make
the time go by.

I still miss the monkey, but he went well with the fava beans ;)

Kevin

 -----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 9:47 PM
 To: Sponsored by ABANA
 Subject: Re: [TheForge] cutting 1/4 copper


 On top of that you need a higher open circuit voltage to strike the arc.
 300V comes to mind, but I don't know where from.

 Steve

 Grover Richardson wrote:
 > Hmmm.  140 VDC, 40 Amps.  That's enough to fry a monkey.  I
 didn't know it
 > was anywhere near that high.
 >
 > -----Original Message-----
 > From: theforge-bounces at mailman.qth.net
 > [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Kevin D
 > Sent: Wednesday, April 13, 2005 12:11 PM
 > To: Sponsored by ABANA
 > 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
 >
 >
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