Pressure Arm Adjustment - Lincoln Electric 12442 Operator's Manual

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INSTALLATION

PRESSURE ARM ADJUSTMENT

WARNING
ELECTRIC SHOCK can kill.
• Turn the input power OFF at the welding power
source before installation or changing drive
rolls and/or guides.
• Do not touch electrically live parts.
• When inching with the gun trigger, electrode
and drive mechanism are "hot" to work and
ground and could remain energized several sec-
onds after the gun trigger is released.
• Only qualified personnel should perform mainte-
nance work.
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The pressure arm controls the amount of force the drive
rolls exert on the wire. Proper adjustment of both pres-
sure arm gives the best welding performance. For best
results, set both pressure arms to the same value.
Set the pressure arm as follows (See Figure A.8):
Aluminum wires
Cored wires
Steel, Stainless wires
FIGURE A.8
C OR ED W I R ES
OUTERSHIELD
METALSHIELD
INNERS HIELD
LF-74
between 1 and 3
between 3 and 4
between 4 and 6
SOLI D W I R ES
1
3 2
ALUMINUM
4
STEEL
5
STAINLE SS
6
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