Lincoln Electric IM539 Synergic 7F and 7FH - Manual (Page 29)

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PROBLEM
1. Rough wire feeding or wire not
feeding but drive rolls turning.
2. Variable or “hunting” arc.
POSSIBLE CAUSE
a. Gun cable kinked and/or twisted.
b. Wire jammed in gun and cable.
c. Incorrect position of drive rolls
with grooves.
d. Drive rolls loose.
e. Gun cable dirty.
f. Worn drive roll.
g. Electrode rusty and/or dirty.
h. Worn nozzle or cable liner.
i. Partially flashed or melted
contact tip.
j. Incorrect idle roll pressure.
k. Improper liner, tip or guide tube.
a. Wrong size, worn and/or melted
contact tip.
b. Worn work cable or poor work
connection.
c. Loose electrode connections.
d. Wrong polarity.
e. Problem with serial
communications in control cable.
WHAT TO DO
a. Inspect gun cable and replace if
necessary.
b. Remove wire from gun and cable
feed in new wire. Note any
obstructions in gun and cable.
Replace gun and cable if
necessary.
c. See Wire Feed Drive Roll and
Guide Tubs Kits section for
proper installation of drive roll.
d. Remove, clean, install and
tighten.
e. Clean cable or replace liner.
f. Replace.
g. Replace.
h. Replace.
i. Replace contact tip.
j. Set idle roll pressure per section
on Idle Roll Pressure Setting.
k. Install proper equipment.
a. Replace tip - remove any spatter
on end of tip.
b. Inspect - Repair or replace as
necessary.
c. Be sure electrode lead is tight in
wire feeder contact block, gun
nozzle and gun tip tight.
d. Check connection at output studs
for polarity required by welding
process.
e. Make sure control cable connections are
tight. Check for consistent WFS. Make sure
parameters on Power Source display, such
as WFS, match those on wire feeder
display, if not, try changing Synergic 7F
control board. If problem persists refer to
Power Source trouble shooting information.
PROBLEMS