Transmig 210, 250, 310, 330
Page 28 of 31 DOC No: MIGTRN0001
Date: 14/09/98 Issue No: 2
10.2 Welding Problems
FAULT CAUSE REMEDY
1 Undercut A Welding arc voltage too
high.
A Reduce voltage by reducing the
Voltage Control switches posi-
tions or turn the Wirespeed con-
trol knob clockwise.
B Incorrect torch angle B Adjust angle
C Excessive heat input C Increase the torch travel speed or
reduce welding current by
reducing the Voltage Control
switches positions and turn the
Wirespeed control knob anti-
clockwise.
2 Lack of penetration A Welding current too low A Increase welding current by
increasing turn the Wirespeed
control knob clockwise and
increasing Voltage Control
switch positions.
B Joint preparation too
narrow or gap too tight
B Increase joint angle or gap
C Shielding gas incorrect C Change to a gas which gives
higher penetration
3 Lack of fusion Arc voltage to low Increase Arc voltage by
increasing the Voltage Control
switches position.
4 Excessive spatter A Arc voltage too high A Lower voltage by reducing the
Voltage Control switches
positions or turn the Wirespeed
control knob clockwise.
B Arc voltage too low B Raise voltage by increasing the
Voltage Control switches or turn
the Wirespeed control knob anti-
clockwise.
5 Irregular weld shape A Incorrect voltage and
current settings. Convex,
Arc voltage too low
Concave,
voltage too high.
A Adjust voltage and current by
adjusting the Voltage Control
switches positions and the
Wirespeed control knob.
B Wire is wandering B Replace contact tip
C Incorrect shielding gas C Check gas selection
D Insufficient or excessive
heat input
D Adjust the Wirespeed control
knob or the Voltage Control
switches.
6 Arc does not have a crisp
sound that short arc
exhibits when the wirefeed
speed and voltage are
adjusted correctly.
The MIG torch has been
connected to the wrong
voltage polarity on the front
panel.
Connect the MIG torch to the
positive welding terminal (+) for
solid wires and gas shielded flux
cored wires.
