Troubleshooting Welds; Proper Gun Handling - Lincoln Electric SP-100 IM366-B Operator's Manual

TROUBLESHOOTING WELDS

Good welds have excellent appearance.
To Eliminate Porosity (in order of importance) —
Turn on gas supply, if used
1. Decrease voltage
2. Increase stickout
3. Increase WFS (wire feed speed)
4. Decrease drag angle
5. Decrease travel speed.
NOTE: Always be sure the joint is free from mois-
ture, oil, rust, paint or other contaminant's.
To Eliminate a Ropey Convex Bead (in order of
importance)
1. Increase voltage
2. Decrease stickout
3. Decrease WFS (wire feed speed)
4. Decrease travel speed
5. Decrease drag angle
6. Check for correct gas, if used
To Reduce Spatter (in order of importance)
1. Increase voltage
2. Increase drag angle
3. Decrease stickout
4. Increase WFS (wire feed speed)
5. Decrease travel speed
6. Check for correct gas, if used
To Correct Poor Penetration (in order of importance)
1. Decrease stickout
2. Increase WFS (wire feed speed) ("oIo")
3. Decrease voltage ("V")
4. Increase speed
5. Decrease drag angle
6. Check for correct gas, if used
If Arc Blow Occurs (in order of importance)
(NOTE: Try different ground connection locations
before adjusting procedures)
1. Decrease drag angle
2. Increase stickout
3. Decrease voltage ("V")
4. Decrease WFS (wire feed speed) ("oIo") and
voltage ("V")
5. Decrease travel speed
To Eliminate Stubbing (in order of importance)
1. Increase voltage ("V")
2. Decrease WFS (wire feed speed) ("oIo")
3. Decrease stickout
4. Increase drag angle
Stubbing occurs when the electrode drives through
the molten puddle and hits the bottom plate tending to
push the gun up.

PROPER GUN HANDLING

Most feeding problems are caused by improper han-
dling of the gun cable or electrodes.
1. Do not kink or pull the gun cable around sharp cor-
ners.
2. Keep the gun cable straight as practical when weld-
ing.
3. Do not allow dolly wheels or trucks to run over the
cables.
4. Keep the cable clean per maintenance instructions
in this Operation Manual.
5. Innershield electrode has proper surface lubrica-
tion. Use only clean, rust-free electrode.
6. Replace the contact tip when it becomes worn or
the end is fused or deformed.
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