Longevity STICKWELD 315 - Manual (Page 19)

250/315 DC ARC Welders
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electrode holder cable. Many electrodes run with in reverse polarity, (DCEP) setting. A few run
with a straight polarity (DCEN). Some will run either way. For reverse polarity (DCEP) stick
welding, swap the electrode holder and ground cable connections.
Proper weld identification: Overlap and undercutting are two main causes of weld failure. Proper
washing of the weld bead into the sides or “toes” of the weld is important. Keep the welding
electrode or the TIG tungsten and welding arc within the weld joint to prevent overlap. Pausing on
the sides of the welds to wait for the sides to fill reduces the chance of undercutting, even if the
current is a little too high. If it is possible, with any practice weld, cut the joint down the middle,
lengthwise, or place the weld in a vice and use a hammer to bend the metal over the weld area until
it is either broken or bent 90 degrees. This destructive testing method will help you improve your
skill by revealing faults and flaws in your welds.