Miller MigMatic 300, Owner'S Manual

Page: 27 / 72

OM-251958 Page 21
4-8. Threading Welding Wire And Adjusting Pressure Roll Tension
1 Wire Spool
2 Welding Wire
3 Inlet Wire Guide
4 Pressure Adjustment Knob
5 Drive Roll
6 Outlet Wire Guide
7 Gun Conduit Cable
Lay gun cable out straight.
4
7
5
6
2
1
Tools Needed:
.
Hold wire tightly to keep it
from unraveling.
WOOD
Open pressure assembly. Pull and hold wire; cut off end. Push wire thru guides into gun;
continue to hold wire.
Close and tighten pressure
assembly, and let go of wire.
Remove gun nozzle and contact tip. Turn On.
Press gun trigger until wire
comes out of gun. Reinstall
contact tip and nozzle
Feed wire to check drive roll pressure.
Tighten knob enough to prevent slipping.
Cut off wire. Close
and latch door.
956142856_8-14_A
Tighten
1
2
3
4
.
Use pressure indicator
scale to set a desired
drive roll pressure.
Pressure
Indicator
Scale
Tighten
1
2
3
4
3
150 mm
(6 in.)