splitrivet
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| posted on 13/12/09 at 01:21 PM |
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Welder experts
Am I right in thinking that one of these
http://cgi.ebay.co.uk/JG-50-A-Air-Plasma-Cutter-torch-50A-12-feet_W0QQitemZ350273313192QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item518dea99a8
providing the connections are OK could be fitted to my DC Tig welder and turn it into a plasma cutter or am I just being dillutional.
Cheers,
BOB
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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coozer
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| posted on 13/12/09 at 01:32 PM |
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Don't plasma cutters use compressed air as well??
1972 V8 Jago
1980 Z750
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MakeEverything
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| posted on 13/12/09 at 01:33 PM |
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I dont think theres any reason why it wouldnt work on an AC TIG as well.
Might consider one for myself at that price!!
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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MakeEverything
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| posted on 13/12/09 at 01:34 PM |
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quote:
Originally posted by coozer
Don't plasma cutters use compressed air as well??
Or oxygen mix, but its only purpose is to "Blow" away the molten slag.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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splitrivet
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| posted on 13/12/09 at 01:44 PM |
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quote:
Originally posted by coozer
Don't plasma cutters use compressed air as well??
Combined with a compressor of course.
Cheers,
Bob
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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wilkingj
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| posted on 13/12/09 at 01:49 PM |
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Plasma cutters use compressed air, not O2 or any other gas.
I think you cant use a plasma torch on a std TIG. I think the voltage is different for a TIG to a plasma Cutter.
I am not exactly sure, but I think the plasma cutter uses a mugh higher voltage than a TIG set.
Unless you have a special Dual Mode set, it wont work on a Std TIG machine.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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flak monkey
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| posted on 13/12/09 at 01:49 PM |
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Welders are high current, low voltage (30v open circuit). Plasma cutters are low current high voltages (10,000v+) so no, it wont work.
David
Sera
http://www.motosera.com
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mark chandler
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| posted on 13/12/09 at 02:06 PM |
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dillutional, sorry
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daviep
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| posted on 13/12/09 at 02:45 PM |
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quote:
Originally posted by MakeEverything
quote:
Originally posted by coozer
Don't plasma cutters use compressed air as well??
Or oxygen mix, but its only purpose is to "Blow" away the molten slag.
That's not really an accurate description.
The high voltage DC ionises the gas so that it forms an extremely high temperature "plasma stream", it is the plasma stream which cuts the
workpiece. It does also carry the melted material out of the cut.
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MakeEverything
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| posted on 13/12/09 at 04:57 PM |
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quote:
Originally posted by daviep
quote:
Originally posted by MakeEverything
quote:
Originally posted by coozer
Don't plasma cutters use compressed air as well??
Or oxygen mix, but its only purpose is to "Blow" away the molten slag.
That's not really an accurate description.
The high voltage DC ionises the gas so that it forms an extremely high temperature "plasma stream", it is the plasma stream which cuts the
workpiece. It does also carry the melted material out of the cut.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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splitrivet
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| posted on 13/12/09 at 08:06 PM |
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Well thats another bag of chips well and truly pee'd on then.
Cheers,
Bob 
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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MikeRJ
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| posted on 13/12/09 at 09:06 PM |
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quote:
Originally posted by flak monkey
Welders are high current, low voltage (30v open circuit). Plasma cutters are low current high voltages (10,000v+) so no, it wont work.
David
They only use that much voltage to start the arc, just like a TIG with HF start. Voltage when cutting is much lower (~140v), though still higher than
a TIG.
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flak monkey
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| posted on 13/12/09 at 09:10 PM |
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I thought they maintained a high voltage to create the plasma stream?
Or is it a case of once the plasma is flowing it doesnt need a big voltage differential to maintain it?
Sera
http://www.motosera.com
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JoelP
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| posted on 13/12/09 at 09:57 PM |
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think it will be like a lightning machine, huge volts to create an arc but once the air is ionised the resistance will be much lower.
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MikeRJ
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| posted on 13/12/09 at 10:14 PM |
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quote:
Originally posted by flak monkey
I thought they maintained a high voltage to create the plasma stream?
Or is it a case of once the plasma is flowing it doesnt need a big voltage differential to maintain it?
It's just like a TIG arc, once the arc is struck the resistance drops significantly so lowers the voltage required to maintain the arc.
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Peteff
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| posted on 13/12/09 at 11:50 PM |
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quote:
Originally posted by mark chandler
dillutional, sorry
Delusional ? Sorry the tig won't power a plasma arc or there would be a lot more tigs being sold as dual purpose machines.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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flak monkey
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| posted on 14/12/09 at 08:00 AM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by flak monkey
I thought they maintained a high voltage to create the plasma stream?
Or is it a case of once the plasma is flowing it doesnt need a big voltage differential to maintain it?
It's just like a TIG arc, once the arc is struck the resistance drops significantly so lowers the voltage required to maintain the arc.
Now I know  Thanks for that
[Edited on 14/12/09 by flak monkey]
Sera
http://www.motosera.com
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