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Author: Subject: cheap tig welders
fazerruss

posted on 27/10/08 at 08:21 PM Reply With Quote
cheap tig welders

anybody used these:

http://cgi.ebay.co.uk/TIG-WELDER-MMA-WELDER-200-INVERTOR-AMP-FREE-DEL_W0QQitemZ190262566799QQcmdZViewItem?hash=item190262566799&_trkparms=72%3A129 8%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14#ebayphotohosting

are they any good for welding ally?





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trikerneil

posted on 27/10/08 at 08:28 PM Reply With Quote
You'll need AC to weld ally, that's a DC machine.

Neil





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RichardK

posted on 27/10/08 at 08:35 PM Reply With Quote
I think the concensus is that it is possible to create a good weld with a dc set but is really only best used for thicker material as it is the ac sets that are more controlable.

There was a decent thread about this HERE

Cheers

Rich

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mark chandler

posted on 27/10/08 at 09:36 PM Reply With Quote
You can weld ali with DC but require a really good constant HF source and reverse the polarity.

You can then watch your carefully prepared bits of ali turn black and sooty as they fall apart. DC ali TIG welding is a commercial proposition, not a lot of good here.

Ali mig welding falls into the same bucket, yes you can but do not expect it to be successful unless you have invested in the correct equipment.

Regards Mark

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