Forney 96FI-A, Operating Manual

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3. Electrode moved over workpiece too
slowly -this causes a very wide and
heavy deposit which overlaps at the
sides. It is wasteful in terms of both time
and electrodes used.
4. Electrode moved over the workpiece too
quickly- this causes poor penetration
with a "stringy" and incomplete weld
deposit. Slag is very difficult to remove.
5. Amperage too low- this causes poor
penetration and causes the electrode to
stick to the workpiece easily. Also results
in a very irregular and high weld deposit
with difficult slag removal.
6. Amperage too high- this causes exces­
sive p e netration with spatter and a deep
and pointed crater. It may even cause
holes to be burnt in the workpiece. Burns
electrodes very quickly.
7. The perfect weld -with the correct combi ­
nation of arc length, amperage regulation
and inclination of the electrode you will,
with practice, produce the perfect weld.
This should be regular with uniform rip ­
ples and no slag contamination. The arc
will make a steady crackling sound.
MAINTENANCE AND SERVICING ..
Your arc welder is a simple and
robust Ul"}it, requiring virtually no mainte ­
nance other than the guidelines shown
below:
• Keep the ventilation holes in welder clean
to avoid the -build up of dirt and oxides
inside the machine, this can reduce
machine output.
• Check all cables periodically; they must
be in good condition and not cracked
.
• Always try to avoid getting particles of
metal inside the machine since they
could cause short circuits.
• Periodically clean the inside of the welder
with compressed air.
IMPORTANT: unplug the welder before
cleaning.