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Symptom
Possible Cause
Failure of weld to
1. Insufficient heat applied to weld.
fuse completely with
2. Improper welding technique.
base metal or prior
weld bead.
3. Workpiece dirty.
4. Duty cycle exceeded.
Unstable arc.
1. Weld circuit polarity is incorrect.
2. Tungsten rod is contaminated (TIG).
3. Arc too long.
4. Workpiece is dirty or damp.
5. Incorrect gas or gas settings (TIG).
Arc wanders.
1. Improper gas flow (TIG).
2. Arc too long.
3. Contaminated electrode/tungsten rod.
4. Workpiece is dirty or damp.
5. Incorrect gas or gas settings (TIG).
Arc is difficult to
1. Weld circuit not complete.
start.
2. No or inadequate gas flow (TIG).
3. Incorrect electrode/tungsten rod used.
4. Workpiece is dirty or damp.
5. Incorrect gas or gas settings (TIG).
-16-
Possible Solution
1. Increase amperage; select larger electrode.
2. Widen groove to access bottom during welding;
keep arc on leading edge of weld puddle; place
stringer bead in proper location at joint during weld-
ing.
3. Remove all grease, oil, moisture, coatings, rust, and
dirt from workpiece before welding.
4. Shut down welder and allow it to cool.
1. Switch cable polarity at welder.
2. Remove
⁄
" of contaminated tungsten rod and prop-
1
2
erly repoint rod.
3. Shorten arc; lower torch/electrode closer to
workpiece.
4. Remove all grease, oil, moisture, coatings, rust, and
dirt from workpiece before welding.
5. Use the correct gas for the welding operation; adjust
the gas flow as necessary.
1. Adjust gas flow as necessary.
2. Shorten arc; lower torch/electrode closer to
workpiece.
3. Replace electrode; (TIG) Remove
nated tungsten rod and properly repoint rod.
4. Remove all grease, oil, moisture, coatings, rust, and
dirt from workpiece before welding.
5. Use the correct gas for the welding operation; adjust
the gas flow as necessary.
1. Check clamps and cables; tighten all connections.
2. Check all gas hoses and connections for leaks and
tighten/replace as necessary; adjust gas flow as
necessary.
3. Use correct type and size of electrode/tungsten rod.
4. Remove all grease, oil, moisture, coatings, rust, and
dirt from workpiece before welding.
5. Use the correct gas for the welding operation; adjust
the gas flow as necessary.
H8154 AC/DC Stick/TIG Welder
⁄
" of contami-
1
2
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