ESAB CIGWELD EasyWeld 130 Operating Manual page 54

EasyWeld / HandyWeld 130
Basic MIG (GMAW) Welding Troubleshooting
FAULT
1 Undercut
2 Lack of penetration A Welding current too low A Increase welding current by increasing Wire Feed
3 Lack of fusion
4 Excessive spatter
5 Irregular weld shape A Incorrect voltage
6 Weld cracking
7 Cold weld puddle
8 Arc does not have
a crisp sound that
short arc exhibits
when the Wire
Feed Speed and
voltage are adjusted
correctly.
MIG (GMAW) WELDING
CAUSE
A Welding arc voltage too
high.
B Incorrect gun angle
C Excessive heat input
B Joint preparation too
narrow or gap too tight
C Incorrect shielding gas C Change to a gas which gives higher penetration.
Voltage too low
A Voltage too high
B Voltage too low
and current settings.
Convex, voltage too low.
Concave, voltage too
high.
B Wire is wandering.
C Incorrect shielding gas C Check shielding gas.
D Insufficient or excessive
heat input
A Weld beads too small
B Weld penetration narrow
and deep
C Excessive weld stresses C Increase weld metal strength or revise design
D Excessive voltage
E Cooling rate too fast
A Loose welding cable
connection.
B Low primary voltage
C Fault in power source
The MIG Gun has been
connected to the wrong
voltage polarity on the
front panel.
Table 5-4: MIG (GMAW) Welding Problems
REMEDY
A Decrease voltage or increase the Wire Feed Speed.
B Adjust angle.
C Increase the gun travel speed and/or decrease
welding current by decreasing the voltage or
decreasing the Wire Feed Speed.
Speed and increasing voltage.
B Increase joint angle or gap.
Increase voltage.
A Decrease voltage or increase the Wire Feed Speed
control.
B Increase the voltage or decrease Wire Feed Speed.
A Adjust voltage and current by adjusting the voltage
control and the Wire Feed Speed control.
B Replace contact tip.
D Adjust the Wire Feed Speed control or the voltage
control.
A Decrease travel speed.
B Reduce current and voltage and increase MIG Gun
travel speed or select a lower penetration shielding
gas.
D Decrease voltage.
E Slow the cooling rate by preheating part to be
welded or cool slowly.
A Check all welding cable connections.
B Contact supply authority.
C Have an Accredited CIGWELD Service Provider to
test then replace the faulty component.
Connect the MIG Gun to the positive (+) welding
terminal for most solid wires and gas shielded flux
cored wires. Connect MIG Gun to the negative (-)
welding terminal for most Gasless Wires. Refer
to the electrode wire manufacturer for the correct
polarity.
5-22 Manual 0-5618