Miller Electric SS-75S12 - Manual (Page 22)

OM-230 298 Page 18
4-15. Installing Welding Wire And Adjusting Pressure Drive Setting
Install wire spool. Ad-
just tension nut so
wire is taut when wire
feed stops.
NONCONDUCTIVE
SURFACE
NONCONDUCTIVE
SURFACE
No Wire Slip Wire Slips
Tools Needed:
15/16 in
Ref. 804 727-A
1
Adjust tension.
2
1 Drive Roll Pressure Adjustment Lever
2 Notch In Lever (Indicates Pressure
Settings)
Pressure drive settings range from 1 to 8 with
8 being the maximum setting.
.
When using cored welding wire use
knurled drive rolls.
.
For aluminum (soft) wire set pressure
drive setting at 4 or below.
.
Be sure that gun has proper size liner for
the welding wire size.
When installing gun, the liner should extend
into the PD continuous guide (or exit guide if
used) as far as possible without interfering
with the guide.
Install gun. Lay gun cable out straight. Cut off
end of wire. Push wire through guide up to
drive rolls; continue to hold wire. Press Jog
button to feed wire out gun.
To adjust drive roll pressure, hold nozzle
about 2 in (51 mm) from nonconductive
surface and press gun trigger to feed wire
against surface. Adjust pressure drive lever
so wire does not slip. Do not overtighten. If
contact tip is completely blocked, wire should
slip at the feeder (see pressure adjustment
above.)
Cut wire off.
Drive Rolls
End Of Liner
Back Of Gun
Pressure door
assembly not
shown.
Thread wire.