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Re: Arc Welders - Advantages/Disadvantages of AC vs DC.
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Posted by tony on October 19, 2000 at 09:33:45 from (12.26.226.66):
In Reply to: Arc Welders - Advantages/Disadvantages of AC vs DC. posted by Alberta Mike on October 16, 2000 at 06:45:52:
DC gives you the option of straight or reverse polaity. Reverse = Electrode pos. Work neg. More forceful arc deeper penitrating Straight= Electrode neg. work pos. not as deep penitrating better for thinner work AC is of course alternating current and the polaity is constantly changing + - + - This constant switching of the current direction has somewhat of a pulsating effect on the arc and tends to produce a medium penitrating weld that is more dense and uniform. With my 2 cents if you are doing much welding go for the ac/dc welder. If you weld rarely the ac should get you along just fine.
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