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The arc welding technique is an acquired skill and requires
considerable practice before perfect results are obtained. The
diagrams below will help to explain the pitfalls (problems) in your
technique and how to overcome them.
Arc too short
This causes irregular masses of weld to be deposited,
with slag contamination on an uneven surface.
Arc too long
This causes poor penetration resulting in a weak weld
with excessive spatter and porosity.
Electrode moved too slowly
This causes a very wide and heavy deposit which
overlaps at the sides. It is wasteful both in terms of
time and electrode use.
Electrode moved too quickly
This causes poor penetration with a ‘stringy’ and
incomplete weld deposit. Slag is very hard to remove.
WELDING PITFALLS
Current too low
This causes poor penetration and causes the electrode
to stick to the work-piece too readily. Also results in a
very irregular and high weld deposit.
Current too high
This causes excessive penetration with spatter and
deep pointed crater. It may also cause holes to be
burned in the work-piece.
The perfect weld
With the correct combination of arc length, current
regulation, inclination and speed of the electrode, you
will (with practice) produce the perfect weld.
MMA WELDING MACHINES
Summary of Contents for IBL M200-89
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