Lincoln Electric K126-11 Innershield Operator's Manual page 21

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PROBLEMS
(SYMPTOMS)
Intermittent wire feed when trigger
is pulled.
Frequent birdnesting or kinking of
wire in the gun cable.
Frequent occurrence of contact tip
burnback.
Poor weld bead appearance.
Wire feeder runs or begins feeding
wire without pulling the gun trigger.
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. Drive roll has become galled.
2. Wire has become kinked along its
feed path.
1. Wire shavings/lubricant
building up in the cable.
2. Cable liner is too large for wire
size.
3. Mechanical resistance to wire
feeding is too large.
1. Improper welding parameters or
technique (example: ESO is too
short).
2. Wire may be feeding inter-
mittently.
1. Improper electrode polarity.
2. Improper welding parameters or
technique.
1. Defective trigger (contacts closed
or dirty).
2. Defective (closed) trigger circuit
in the welding machine.
3. Trigger lead(s) inside gun cable
are shorted together or commonly
shorted to either welding or
accessory switch circuits.
K126-[ ] INNERSHIELD® PRO
CAUSE
1. Remove and then clean or
2. Manually pull wire slowly thru gun
is 1. Clean cable or replace cable
2. Install the smallest possible liner
3. If using a reverse bend gun tube,
1. See welding wire literature for
2. See symptoms on intermittent or
1. Reconnect machine's welding
2. See welding wire literature for
1. Replace trigger assembly.
2. See
3. Damaged control leads along
CAUTION
RECOMMENDED
COURSE OF ACTION
replace drive roll.
until unkinked wire emerges.
liner.
which is specified for the wire
being used (i.e. use a .052-1/16
liner instead of a 1/16-5/64 liner
when welding with 1/16" diameter
wire.
try welding with a non reverse
bend product.
proper settings.
sluggish wire feed.
output to proper electrode polarity.
proper settings.
machine's instruction
manual.
cable; repair if possible.
Otherwise, replace gun cable.
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