Century OM-117071002 Operator's Manual page 11

12.
13.
Let go of the wire.
Plug the welder's power cord into
the ac power source. Adjust the
HEAT selection switches, on the
front of the welder, to any of the four
heat settings.
WARNING
ARC RAYS CAN INJURE EYES!
To reduce the risk of arc flash, make
certain that the welding wire, when it
finally comes out of the end of the
gun, does not touch the ground
clamp or any grounded piece of
metal. IMPORTANT! The welding
wire is carrying welding current
whenever the welder is turned on--
WHETHER THE TRIGGER IS
PULLED OR NOT!
14. Pull the trigger on the welding gun
to feed the wire through the gun
assembly.
15. When at least an inch of wire sticks
out past the end of the gun, release
the trigger.
16. Install the supplied 0.030 inch
(0.8mm) size contact tip.
17. Slide the contact tip over the wire
(protruding from the end of the
gun). Screw the contact tip into the
end of the gun and hand tighten
securely.
18. Install the nozzle on the gun
assembly.
19. Cut off the excess wire that extends
past the end of the nozzle.
20. Set the wire drive tension.
WARNING
ARC RAYS CAN INJURE EYES!
To reduce the risk of arc flash, make
certain that the wire coming out of
the end of the gun does not come in
contact with the ground clamp or any
grounded material during the drive
tension setting process or arcing will
occur.
a.
b.
Pull the trigger on the gun.
Turn the drive tension
adjustment knob clockwise,
increasing the drive tension
until the wire seems to feed
smoothly with out slipping.
NOTE: If TOO MUCH tension is
applied, the wire will slip on
the drive roller or will not be
able to be fed at all. If TOO
LITTLE tension is applied,
the spool of wire will want to
unspool itself. Readjust the
drive brake tension as
necessary to correct for
either problem.
c. Block the end of the nozzle by
holding it up against
something that doesn't
conduct electricity, such as a
block of wood or a concrete
floor, then trigger the gun
again, the wire should slip at
the drive roller. However, if the
wire bird-nests at the drive
roller, rethread the drive
system using less drive
tension and try again.
When the drive tension is set correctly,
there should be no slippage between the
wire and the drive roller. But if an
obstruction occurs along the wire feed
path, the wire should then slip on the
drive roller.
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