When using an open arc process, it is necessary
to use correct eye, head, and body protection.
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8. Position electrode over joint. End of electrode
may be lightly touching the work.
9. Lower welding helmet, close gun trigger, and
begin welding. Hold the gun so the contact tip
to work distance is about 3/8" (10 mm) [3/4"
(20 mm) for Outershield].
10. To stop welding, release the gun trigger and
then pull the gun away from the work after the
arc goes out.
11. When no more welding is to be done, close
valve on gas cylinder (if used), momentarily
operate gun trigger to release gas pressure,
and turn off POWER MIG® 255XT.
AVOIDING WIRE FEEDING
PROBLEMS
Wire feeding problems can be avoided by
observing the following gun handling proce-
dures:
a. Do not kink or pull cable around sharp corners.
b. Keep the gun cable as straight as possible
when welding or loading electrode through
cable.
c.
Do not allow dolly wheels or trucks to run over
cables.
d. Keep cable clean by following maintenance
instructions.
e. Use only clean, rust-free electrode. The Lincoln
electrodes have proper surface lubrication.
f.
Replace contact tip when the arc starts to
become unstable or the contact tip end is fused
or deformed.
OPERATION
WARNING