Model G0879 (Mfd. Since 6/19)
-25-
Welding Tips
The following list includes good practices for
welding. The list is by no means exhaustive, but
contains some basic tips to aid the user in devel-
oping better welding skills by focusing on contact
tip to work distance, gun angle, travel speed, wire
speed, amperage output, and slag coverage.
For Flux Core Arc Welding (FCAW):
•
Contact Tip to Work Distance: Too short of
contact tip to work distance can cause burn-
back and poor slag coverage. Too long of
distance will cause stubbing and inconsistent
welds.
•
Gun Angle: Too aggressive of a gun angle will
cause wire to blowout the weld puddle, mak-
ing it globby and inconsistent. Sometimes,
too minimal of weld angle can cause slag
inclusions in welds, causing weak points.
•
Gun Travel Speed: Too slow of gun travel
speed can cause built-up and convex welds
with bad slag coverage. Too fast of gun travel
speed can cause narrow, globby welds with
minimal penetration.
•
Wire Speed: Wire speed is strongly related
to amperage, but it has more to do with weld
heat. Too high of wire speed can cause stub-
bing and poor slag coverage. Too low of wire
speed can cause globby welds with lots of
spatter.
•
Amperage Output: Amperage is strongly
related to wire speed, but it has more to do
with weld penetration. Too high of amperage
output tends to yield deeper weld penetration
and burn-through, whereas too low of amper-
age can cause bad bonding between weld
and workpiece with lots of spatter.
•
Slag Coverage: As flux melts during the
welding process, it is redeposited as slag on
top of the weld bead. Ideally, FCAW welds
will have consistent and even slag coverage
to properly protect the weld from contamina-
tion while cooling. Never weld on top of slag;
always remove before making another weld.
Summary of Contents for G0879
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