Jasic EVOLVE 200 Operator's Manual page 57

TIG WELDING TROUBLESHOOTING
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
TIG welding defects and prevention methods
Defect
Excessive bead build up, poor
penetration or poor fusion at the
edges of the weld.
Weld bead flat and too wide or
undercut at the weld edge or burning
through.
Weld bead too small or insufficient
penetration.
Weld bead too wide or excessive
bead build up.
Uneven leg length in fillet joint.
Tungsten melts or oxidises when
welding arc is established.
Possible cause
Weld current too low.
Weld current too high.
Welding travel speed too fast.
Welding travel speed too slow.
Wrong placement of filler rod.
TIG torch lead connected to +
Little or no gas flow to weld
pool.
Gas cylinder or hoses contain
impurities.
The tungsten is too small for the
weld current.
TIG/MMA selector set to MMA.
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Action
Increase the welding amperage.
Poor material prep.
Decrease the welding amperage.
Reduce your welding travel speed.
Increase your welding travel speed.
Re-position filler rod.
Connect torch to - polarity.
Check gas apparatus as well as torch and
hoses for breaks or restrictions.
Change gas cylinder and blow out torch
and gas hoses.
Increase the size of the tungsten.
Ensure you have the power source set
to TIG function.