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Rough wire feeding or wire not feed-
ing, but drive rolls are turning.
Variable or “hunting” arc.
1. Gun cable kinked and/or twisted.
2. Wire jammed in gun and cable.
3. Check for current position of
drive rolls relative to split wire
guide groove.
4. Drive rolls may not be seated
properly.
5. Gun cable dirty.
6. Worn drive roll.
7. Worn nozzle or cable liner.
9. Partially flashed or melted contact
tip
10. Incorrect drive roll pressure.
11. Improper liner, contact tip, or
inner/outer wire guides.
12. Incorrect wire drive or gear ratio
selection on the control p.c.
board.
1. Wrong size, worn and/or melted
contact tip.
2. Worn work cable or poor work
connection.
3. Loose electrode or work cable
connections.
4. Wrong polarity.
5. Gas nozzle extended beyond gun
tip or wire stickout too long while
welding.
6. Poor gas shielding on processes
requiring gas.
7. Improper power source selection
on the control p.c. board.
TROUBLESHOOTING
LN-10
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
E-2E-2
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.