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Poor-quality weld properties
Cause:
Incorrect welding parameters
Remedy:
Correct settings
Cause:
Poor ground earth connection
Remedy:
Establish good contact with workpiece
Cause:
Too little or no shielding gas
Remedy:
Check pressure regulator, gas hose, gas solenoid valve, and welding
torch gas connection. For gas-cooled welding torches, check gas seal,
use suitable inner liner
Cause:
Welding torch leaks
Remedy:
Replace welding torch
Cause:
Excessively large or heavily worn contact tip
Remedy:
Change contact tip
Cause:
Incorrect wire alloy or incorrect wire diameter
Remedy:
Check the inserted wire spool/basket-type spool
Cause:
Incorrect wire alloy or incorrect wire diameter
Remedy:
Check the weldability of the parent material
Cause:
Shielding gas not suitable for wire alloy
Remedy:
Use correct shielding gas
Cause:
Unfavorable welding conditions: Shielding gas contaminated (moistu-
re, air), inadequate gas shield (weld pool "boiling", draft), impurities in
the workpiece (rust, paint, grease)
Remedy:
Optimize welding conditions
Cause:
Shielding gas escaping at clamping nipple
Remedy:
Use the correct clamping nipple
Cause:
Clamping nipple seal ring defective, shielding gas escaping at clam-
ping nipple
Remedy:
Replace clamping nipple to ensure gas tightness
Cause:
Welding spatter in the gas nozzle
Remedy:
Remove welding spatter
Cause:
Turbulence due to excessively high quantity of shielding gas
Remedy:
Reduce quantity of shielding gas; recommended:
shielding gas quantity (l/min) = wirespool diameter (mm) x 10
(for example 16 l/min for 1.6 mm wire electrode)
Cause:
Excessively large distance between welding torch and workpiece
Remedy:
Reduce distance between welding torch and workpiece (approx. 10–
15 mm/0.39–0.59 in.)
Cause:
Excessively large work angle of the welding torch
Remedy:
Reduce work angle of the welding torch
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