Lincoln Electric ACTIV8 Operator's Manual page 33

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PROBLEMS
(SYMPTOMS)
Wire feed speed consistently oper-
ates at the wrong value. The speed
changes when the wire feed speed
knob is adjusted.
The wire feed speed stuck at 200-
300 in/min and there is no change
when the wire feed speed knob is
adjusted.
Variable or "hunting" arc.
Poor arc starts with sticking or
"blast-offs", weld porosity, narrow
and ropy looking bead.
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.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
1. The brushes on the motor are
worn.
1. The tachometer is connected
improperly.
2. The tachometer has failed.
1. Wrong size, worn and/or melted
contact tip.
2. Worn work cable or poor work
connection.
3. Wrong polarity.
4. The gas nozzle is extended
beyond the contact tip or the wire
stickout is too long.
5. Poor gas shielding on processes
requiring gas.
Improper procedures or techniques.
CAUSE
CAUTION
ACTIV8™
RECOMMENDED
COURSE OF ACTION
1. Replace the motor and tachome-
ter assembly.
1. Verify all of the tachometer leads
are properly connected.
2. Replace the motor and tachome-
ter assembly.
1. Replace the contact tip.
2. Verify all work and electrode con-
nections are tight and that the
cables are in good condition.
Clean/replace as necessary.
3. Adjust polarity to the recommend-
ed procedure. Verify DIP switch
#7 setting matches the electrode
polarity.
4. Adjust the gas nozzle and shorten
the stickout to ½ to ¾ inches.
5. Check gas flow and mixture.
Remove or block sources of
drafts.
See "Gas Metal Arc Welding Guide"
(GS-100)
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