Firepower FP 95 FC, Operating Manual & Installation Manual

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ESAB FIREPOWER FP-125,135,165
SERVICE 5-2 Manual 0-5123
6. Incorrect or worn contact tip.
a. The contact tip transfers the weld current to the electrode wire. If the hole in the contact tip is too large, then arcing
may occur inside the contact tip resulting in the electrode wire jamming in there. When using soft electrode wire such
as aluminum, the wire may become jammed in the contact tip due to expansion of the wire when heated. A contact
tip designed for soft electrode wires should be used.
7. Poor work lead contact to work piece.
a. If the work lead has a poor electrical contact to the work piece, then the connection point will heat up and result in a
reduction of power at the arc.
8. Bent liner.
a. This will cause friction between the wire and the liner thus reducing wire feedability
5.05 Welding Problems
FAULT CAUSE REMEDY
1
Undercut.
A Welding arc voltage too
high.
A Reduce voltage by reducing the voltage selection
switch position or increase the wire feed speed.
B Incorrect torch angle B Adjust angle
C Excessive heat input C Increase the torch travel speed and/or reduce
welding current by reducing the voltage selection
switch position or reducing the wire feed speed.
2
Lack of penetration.
A Welding current too low A Increase welding current by increasing wire feed
speed and increasing voltage selection switch posi-
tion.
B Joint preparation too nar-
row 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. Voltage too low Increase voltage by increasing voltage selection
switch position.
4
Excessive spatter.
A Voltage too high A Lower voltage by reducing the voltage selection
switch or increase wirespeed control.
B Voltage too low B Raise voltage by increasing the voltage selection
switch or reduce wirespeed control.
5 Irregular weld shape.
A Incorrect voltage and
current settings. Convex =
voltage too low. Concave
= voltage too high.
A Adjust voltage and current by adjusting the voltage
selection switch and the wirespeed control.
B Wire is wandering B Replace contact tip
C Incorrect shielding gas C Check shielding gas
D Insufficient or excessive
heat input
D Adjust the wirespeed control or the voltage selec-
tion switch
Table 5-1a: Welding Problems