Lincoln Electric IM10178 POWER FEED 84 U.I. CONTROL BOX - Manual (Page 17)

A-10
INSTALLATION POWER FEED 84, POWER FEED 84 DUAL
wire drive Pressure setting:
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 little 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
step electrode lead to the gun adapter.
Figure a.9
PRESSURE
ADJUST KNOB