Harbor Freight Tools 98871 - Manual (Page 23)

Page 23 For technical questions, please call 1-800-444-3353. SKU 98871
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coat of Slag Over Weld
Slag is a necessary part of a flux-
core wire weld. It shields the weld from
impurities. clean off the slag with the
chipping hammer and Wire Brush after
welding.
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PArtiAlly chiPPed AwAy to show weld
Burn-through
Base material melts away,
leaving a hole in the weld.
POSSIBLE cAUSES And SOLUtIOnS
Workpiece overheating: 1.
Reduce current and/or wire feed speed.
Welding speed too slow: 2.
Increase welding speed and ensure that
welding speed is kept steady.
Excessive material at weld: 3.
Reduce wire feed speed.
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Porosity
Small cavities or holes in the bead.
POSSIBLE cAUSES And SOLUtIOnS
dirty workpiece or welding wire: 1.
Clean workpiece down to bare metal.
Make certain that wire is clean and free
from oil, coatings, and other residues.
Inconsistent welding speed: 2.
Maintain steady weld speed.
Stickout too long: 3.
Reduce stickout.
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Excessive Spatter
Fine spatter is normal.
Spatter that is grainy and large is a problem.
POSSIBLE cAUSES And SOLUtIOnS
dirty workpiece or welding wire: 1.
Clean workpiece down to bare metal.
Make certain that wire is clean and free
from oil, coatings, and other residues.
Wire feeding too fast: 2.
Reduce wire feed speed.
Stickout too long: 3.
Reduce stickout.
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crooked/Wavy Bead
POSSIBLE cAUSES And SOLUtIOnS
Inaccurate welding: 1.
Use two hands or rest hand on steady
surface.
Inconsistent welding speed: 2.
Maintain steady weld speed.
Stickout too long: 3.
Reduce stickout.
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