PRO-POINT 8611311 Manuel D'utilisation page 29

V1.0
PROBLEM(S)
Porosity − small
cavities or holes
resulting from gas
pockets in weld
metal.
Excessive Spatter. 1. Amperage too high
Weld sits on top,
lack of fusion.
Lack of
penetration.
Excessive
penetration - burn
through.
Uneven weld
appearance.
Electrode welds
with different or
unusual arc
characteristic.
Distortion −
movement of base
metal during
welding.
MIG WELDING
PROBLEM(S) POSSIBLE CAUSE(S)
Excessive Spatter 1. Wire feed speed set too
2. Voltage too high.
3. Wrong polarity set.
4. Stick out too long.
5. Contaminated base metal.
6. Contaminated MIG wire.
7. Inadequate gas flow or too
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180 MULTI-PROCESS MIG-ARC-TIG WELDER
POSSIBLE CAUSE(S)
1. Arc length too long
2. Workpiece dirty,
contaminated or moisture
3. Damp electrodes
2. Arc length too long
1. Insufficient heat input.
2. Workpiece dirty,
contaminated or
moisture.
3. Poor welding technique.
1. Insufficient heat input.
2. Poor welding technique.
3. Poor joint preparation.
1. Excessive heat input.
2. Incorrect travel speed.
Unsteady hand, wavering
hand.
Incorrect polarity.
1. Excessive heat input.
2. Poor welding technique.
3. Poor joint preparation
and or joint design.
high.
much gas flow.
SUGGESTED SOLUTION(S)
1. Shorten the arc length.
2. Remove moisture and materials like paint, grease, oil
and dirt, including mill scale from base metal.
3. Use only dry electrodes.
1. Decrease the amperage or choose a larger electrode.
2. Shorten the arc length.
1. Increase the amperage or choose a larger electrode.
2. Remove moisture and materials like paint, grease, oil
and dirt, including mill scale from base metal.
3. Use the correct welding technique or seek
assistance for the correct technique.
1. Increase the amperage or choose a larger electrode.
2. Use the correct welding technique or seek
assistance for the correct technique.
3. Check the joint design and fit up, make sure the
material is not too thick. Seek assistance for the
correct joint design and fit up.
1. Reduce the amperage or use a smaller electrode.
2. Try increasing the weld travel speed.
Use two hands where possible to steady up, practice
your technique.
Change the polarity, check the electrode manufacturer
for correct polarity.
1. Reduce the amperage or use a smaller electrode.
2. Use the correct welding technique or seek assistance
for the correct technique.
3. Check the joint design and fit up, make sure the material is
not too thick. Seek assistance for the correct joint design
and fit up.
SUGGESTED SOLUTION(S)
1. Select lower wire feed speed.
2. Select a lower voltage setting.
3. Select the correct polarity for the wire being used - see
machine setup guide.
4. Bring the torch closer to the work.
5. Remove materials like paint, grease, oil and dirt, including
mill scale from base metal.
6. Use clean dry rust free wire. Do not lubricate the wire with
oil, grease etc.
7. Check the gas is connected, check hoses, gas valve and
torch are not restricted. Set the gas flow between 21 to 30
CFH flow rate. Check hoses and fittings for holes, leaks
etc. Protect the welding zone from wind and drafts.
8611311
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