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Techniques for striking an arc, examples of good and bad welds, conditions that affect the weld bead, and more.
All suggested settings are approximate.
Welds should be tested to comply to your specifications.
What material are you welding?
What electrode are you using?
Use less amps on thin metal; more amps on thick metal.
DCEP: DC, Electrode Positive (reverse polarity) has the most weld penetration
AC: medium weld penetration (can be more spatter)
DCEN: DC, Electrode Negative (straight polarity) has the least weld penetration