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Re: Any Professional Welders out there?
Posted by Simon S (more from Simon S) on Fri, 27 Jun 2003 12:08:40
In Reply to: Re: Any Professional Welders out there?, chrisx, Fri, 27 Jun 2003 11:16:26
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With tig, you're relying on hand-feeding filler, so you have ultimate control over quantity. It is less convienent for long welds than wire-feed. Tig is usually the only option for light gauge, because of the control available. The problem with a wire-feed, as with stick, is you're stuck using the wire as your electrode, so you are limited to a current range: enough current to melt the rod, but not too much to melt it in your gun... With tig, you're using a tungston electrode, which doesn't erode much... You can through the foot pedal, apply as much or as little power as you need. If you don't heat something up enough, you can correct your mistake without adding gobs of filler where you don't want it. Also, by altering the shape of the tip of the electode, you can basically alter the spray pattern of electrons, concentrating or diffusing the energy. As an example, you can make a pencil point, and weld two razor blades blade-to-blade (with a more steady hand than mine...) or you can ball-up the tip of an electrode to give the diffuse heat required for welding aluminium.
-Simon S
posted by 148.63.11...
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