Weldclass Weldforce 202T - TIG Welding Troubleshooting

Weldforce 202T AC/DC
© Weldclass 2020 | E.&O.E. 53
12.5 TIG Welding Troubleshooting
Troubleshooting – TIG Weld quality
Fault
Cause
Remedy
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
Weld bead too wide and flat or
undercut at edges of weld or
excessive burn through
Welding current is too high.
Decrease weld current.
Weld bead too small or
insufficient penetration or
ripples in bead are widely
spaced apart.
Travel speed too fast.
Decrease weld current.
Weld bead too wide or
excessive bead build up or
excessive penetration in butt
joint.
Travel speed too fast.
Increase travel speed.
Uneven leg length in fillet joint
Wrong placement of filler rod.
Re-position filler rod.
Electrode melts or oxidises
when an arc in struck
Torch lead connected to positive
welding terminal.
Connect torch lead to negative
welding terminal.
No gas flowing to welding
region.
Check the gas lines for kinks or
breaks and gas cylinder contents.
Torch is clogged with dust or dirt.
Clean torch.
Gas hose is cut.
Replace gas hose.
Gas passage contains impurities.
Disconnect gas hose from the rear
of Power Source then raise gas
pressure and blow out impurities.
Gas regulator turned off.
Turn on.
Torch electrode is too small for
the welding current.
Increase electrode diameter or
reduce the welding current.
Dirty weld pool
Electrode contaminated by
contact with work piece or filler
rod material.
Clean the electrode by grinding off
any contaminates.
Work piece surface has foreign
material on it.
Clean surface.
Gas contaminated with air.
Check gas lines for cuts and loose
fitting or change gas cylinder.
Poor weld pool
Inadequate shielding gas.
Increase gas flow or check gas line
for gas flow problems.
Arc start is not smooth.
Tungsten electrode is too large
for the welding current.
Select the right size electrode.
The wrong electrode is being
used for the welding job.
Select the right electrode type.
Gas flow rate is too high.
Select the right rate for the welding
job.
Incorrect shielding gas is being
used.
Select the right shielding gas.
Poor Work Lead/Clamp
connection to work piece.
Improve connection to work piece.
Arc flutters during TIG welding.
Tungsten electrode is too large
for the welding current.
Select the right size electrode.
Table 16