Tig (Gtaw) Welding Problems - Thermal Arc Fabricator 211i Operating Manual

FABRICATOR 211i

4.06 TIG (GTAW) Welding Problems

FAULT
1 Excessive bead build up or
poor penetration or poor
fusion at edges of weld.
2 Weld bead too wide and
flat or undercut at edges
of weld or excessive burn
through.
3 Weld bead too small or
insufficient penetration or
ripples in bead are widely
spaced apart.
4 Weld bead too wide or
excessive bead build up or
excessive penetration in
butt joint.
5 Uneven leg length in fillet
joint
6 Electrode melts or oxidises
when an arc is struck.
BASIC WELDING GUIDE
CAUSE
Welding current is too
low
Welding current is too
high
Travel speed too fast
Travel speed too slow
Wrong placement of
filler rod
A Torch lead connected
to positive welding
terminal.
B No gas flowing to weld-
ing region.
C Torch is clogged with
dust or dirt.
D Gas hose is cut.
E Gas passage contains
impurities.
F Gas regulator turned
off.
G Torch valve is turned
off.
H The electrode is too
small for the welding
current.
I Power source is set for
MIG welding.
4-24
BASIC WELDING
REMEDY
Increase weld current and/or faulty joint
preparation.
Decrease weld current.
Reduce travel speed.
Increase travel speed.
Re-position filler rod.
A Connect torch lead to negative welding
terminal.
B Check the gas lines for kinks or breaks
and gas cylinder contents.
C Clean torch.
D Replace gas hose.
E Disconnect gas hose from the rear of
Power Source then raise gas pressure
and blow out impurities.
F Turn on.
G Turn on.
H Increase electrode diameter or reduce the
welding current.
I Set Power Source to LIFT TIG mode.
Manual 0-5225