Idle Roll Pressure Setting - Lincoln Electric POWER MIG 255XT Operator's Manual

OPERATION
3. Release the pressure on the idle roll by swinging the
adjustable pressure arm down toward the back of the
machine. Lift the cast idle roll assembly and allow it to sit
in an upright position. Leave the outer wire guide plate
installed. Manually feed the wire through the incoming
guide bushing and through the guide plates (over the
drive roll groove). Push a sufficient wire length to assure
that the wire has fed into the gun and cable assembly
without restriction. Reposition the adjustable pressure
arm to its origi-nal position to apply pressure to the wire.
4. Press gun trigger to feed the electrode wire through the
gun.

IDLE ROLL PRESSURE SETTING

WARNING
ELECTRIC SHOCK can kill.
• Turn the input power OFF at the welding
power source before installation or chang-
ing 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 seconds after the gun trigger
is released.
• Only qualified personnel should perform maintenance
work.
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The pressure arm controls the amount of force the drive rolls exert on the
wire. Proper adjustment of both pressure arm gives the best welding per-
formance. For best results, set both pressure arms to the same value.
Set the pressure arm as follows (See Figure B.3):
Aluminum wires between 1 and 3
Cored wires between 3 and 4
Steel, Stainless wires between 4 and 6
Figure B.3
1
CORED WIRES SOLID WIRES
3 2
ALUMINUM
4
OUTERSHIELD
5
METALSHIELD
6
INNERS HIELD
STAINLE SS
STEEL