CIGWELD WELDSKILL 200HF, Operating Manual

Page: 36 / 60

OPERATING MANUAL
200HF
SERVICE 5-8 Manual 0-5406
5.04 TIG (GTAW) Welding Problems
FAULT CAUSE REMEDY
1 Excessive bead 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 Torch lead connected
to positive welding
terminal.
A Connect 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
damaged.
D Replace shielding gas hose.
E Shielding Gas passage
contains impurities.
E Disconnect gas hose from the rear of
Power Source then raise gas pressure
and blow out impurities.
!
WARNING
1. Wear approved face shield or
safety goggles.
Side shields recommended.
2. Wear proper body protection
to protect skin.
F Shielding gas regulator
turned off.
F Turn On Shielding Gas and adjust
Shielding Gas flow rate for the welding
job. Refer to Table 5-5 on Page 5-7.
G The electrode is too
small for the welding
current.
G Increase electrode diameter or reduce the
welding current.