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reverse polarity and straight polarity
The answer is right but a bit of furthur explanation is required. Polarity can be changed in DC output welding sets. The heat of the welding arc is concentrated on the positive terminal. So when thick plates are welded as more concentration of heat is required on the job the job is kept +ve ie. straight polarity is used.
For thin plates concentration of heat is on the filler rod ,so reverse polarity is used.
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∙ 12y ago
Anonymous
Straight and reverse polarity
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