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Trouble
Uneven weld appearance
Distortion: movement of base
metal during welding
Electrode welds with di erent or
unusual arc characteristic
5.5. DC TIG Welding trouble shooting
The following chart addresses some of the common problems of DC TIG welding. In all cases of
equipment malfunction, the manufacturer's recommendations should be strictly adhered to and
followed.
Trouble
Tungsten burning
Reason
Unsteady hand, wavering hand
Excessive heat input
Poor welding technique
Poor joint preparation and or
joint design
Incorrect polarity
Reason
Incorrect Gas or No Gas
Inadequate gas ow
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Solutions
Use two hands where
possible to steady up,
practise your technique
Reduce the amperage
or use a smaller
electrode
Use the correct
welding technique or
seek assistance for the
correct technique
Check the joint design
and t up, make sure
the material is not too
thick. Seek assistance
for the correct joint
design and t up
Change the polarity,
check the electrode
manufacturer for
correct polarity
Solutions
Use pure Argon. Check
cylinder has gas,
connected, turned on and
torch valve is open
Check the gas is
connected, check hoses,
gas valve and torch are
not restricted
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