SERVICE MANUAL
Transmig 165
ST
Transmig 165
ST
SERVICE MANUAL
Transmig 165
ST
Transmig 165
ST
TIG (GTAW) WELDING 6-8 Manual 0-5442
6.04 TIG (GTAW) Welding Problems
FAULT
CAUSE
REMEDY
1 Excessive beard build up
or poor penetration or poor
fusion at edges of weld.
Welding current is too
low
Increase weld current and/or faulty joint
preparation.
2 Weld bead too wide and
flat or undercut at edges
of weld or excessive burn
through.
Welding current is too
high
Decrease weld current.
3 Weld bead too small or
insufficient penetration or
ripples in bead are widely
spaced apart.
Travel speed too fast
Reduce travel speed.
4 Weld bead too wide or
excessive bead build up or
excessive penetration in
butt joint.
Travel speed too slow
Increase travel speed.
5 Uneven leg length in fillet
joint
Wrong placement of
filler rod
Re-position filler rod.
6 Electrode melts or oxidises
when an arc is struck.
A TIG Torch lead
connected to positive
welding terminal.
A Connect TIG Torch lead to negative
welding terminal.
B No shielding gas
flowing to welding
region.
B Check the shielding gas lines for kinks
or breaks and shielding gas cylinder
contents.
C Torch is clogged with
dust or dirt.
C Clean torch.
D Shielding Gas hose is
cut.
D Replace shielding gas hose.
E Shielding gas regulator
turned off.
E Turn On Shielding Gas and adjust
Shielding Gas flow rate for the welding
job. Refer to Table 6-5 on Page 6-7.
F TIG Torch Shield Gas
valve is turned off.
F Turn ON the TIG Torch Shielding Gas
valve.
G The electrode is too
small for the welding
current.
G Increase electrode diameter or reduce the
welding current.
H Power source is set for
MIG welding.
H Set Power Source to Lift TIG mode.
Содержание Transmig 165ST
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