Lincoln Electric FLEX FEED 74 HT Operator's Manual page 11

FLEX FEED™ 74 HT
FEED PLATE PRESSURE ADJUSTMENT
(See Figure A.2)
• Most wires operate well with a pressure setting of "2".
The best drive roll pressure varies with wire type, wire
surface, lubrication and hardness. Too much pressure
may crush the wire or cause "birdnesting", but too lit-
tle pressure could cause slippage.
Set the drive roll pressure by:
1. Press the end of the gun against a solid object that is
electrically isolated from the welder output and press
the gun trigger for several seconds.
2. If the wire "birdnests" or jams, the drive roll pressure
is too high. Reduce the pressure by one turn of the
knob, run new wire through the gun, and repeat step
1.
3. If the only result is slippage, disconnect the gun and
pull the gun cable forward about 6" (150mm). There
should be a slight waviness in the exposed wire. If
there is no waviness, increase the pressure setting
one turn, reconnect the gun and repeat the above
steps.
FIGURE A.2
PRESSURE
ADJUST KNOB
A-4
INSTALLATION