Section 5 − Operation; Gun Controls; Gun Pressure Roll Tension Setting - Miller Electric OM-227 398D Owner's Manual

5-1. Gun Controls

5-2. Gun Pressure Roll Tension Setting

Tools Needed:
SECTION 5 − OPERATION
1
2
1
Press trigger to energize welding
power
applicable), start shielding gas flow,
and begin wire feed.
Switches inside the wire feeder can
be set to provide timed shielding
gas preflow and postflow when
trigger is pressed and released.
When this feature is turned Off, no
preflow or postflow is provided for
the welding operation.
2
Use control to fine adjust wire feed
speed set on XR-Control. Gun Wire
Speed Control has 3-3/4 turns of
adjustment from minimum to maxi-
mum.
.
.
1
Wire tension should be set to 4XXX
for 4000 series aluminum wire.
1
Rotate Pressure Roll Adjustment
Screw fully counterclockwise until
indicator line on adjustment knob
lines up with indicator line on handle
in the 4XXX position.
Wire tension should be set to 5XXX
for 5000 series aluminum and stain-
less wire.
Rotate Pressure Roll Adjustment
Screw fully clockwise until indicator
line on adjustment knob lines up
with indicator line on handle in the
5XXX position.
Trigger
source contactor (if
Gun Wire Speed Control
Ref. 804 545-B
Aluminum series specific -
Pressure roll tension setting
ensures smooth wire feeding
action.
Gun Pressure Roll Tension is
factory set to 4XXX.
Pressure Roll Adjustment
Screw
Ref. 804 545-B
OM-227 398 Page 13