ESAB Migmaster 275 Instruction Manual page 40

sectIon 5
WelD conDItIon
6. Stringy irregular bead,
poor penetration.
7. Bead not centered.
8. Bead too large.
9. Unstable arc, excess
spatter, weld porous.
10.Shield gas flow low or
stopped
11.Wire stubs on work
while welding.
12.Wire burns back into
contact tip.
possIBle cause
b. Welding cables too long or too
small.
c. Loose connection.
d. Malfunctioning capacitor bank.
a. Torch moved too fast.
b. Controls are not set properly for
metal gauge thickness.
c. Wrong polarity.
a. Nozzle not aligned.
a. Torch moved too slowly.
a. Incorrectly set controls.
b. Shield gas flow is too low or
stopped.
c. Torch nozzle is too far from work.
d. Faulty regulator or adapter.
e. Faulty gas solenoid valve (SOL).
f. Wrong polarity.
a. Cylinder valve closed.
b. Cylinder empty.
c. Faulty regulator or adaptor.
d. Faulty gas solenoid valve.
a. Controls not set properly for
metal gauge, thickness.
a. Contact tip loose.
b. Tip too close to work.
c. Wire feed slipping.
d. Contact tip damaged.
e. Voltage setting too high.
f. Optional Burn Back module time
Setting too long.
40
reMeDY
b. Use correct cable size.
c. Check all welding cable
connections.
d. Check capacitors for low
leakage resistance.
a. Move Torch slower along seams.
b. Reset control properly.
c. Check for correct polarity.
a. Move Torch nozzle parallel to
and centered over seam.
a. Move Torch faster along seam.
a. Reset controls.
b. See Condition 10.
c. Maintain 1/4" (.6 mm) wire
protrusion; hold closer to work.
d. Check flow at outlet;
replace faulty item.
e. Replace solenoid valve.
f. Check polarity.
a. Turn off regulator, slowly open
valve, until regulator reaches
35 c.f.h. pressure.
b. Replace if gauge so indicates.
c. Check flow at outlet; replace
faulty item.
d. Replace solenoid valve.
a. Reset controls properly.
a. Firmly tighten with pliers.
b. Maintain 1/4" (.6 mm) wire
protrusion; hold Torch further
from work.
c. Increase pressure on pressure
roll by adjusting pressure knob.
d. Trim back tip 1/16" (1.6 mm) max.
Replace if still faulty.
e. Adjust setting.
f. Reduce time setting
serVIce