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Poor weld properties
Cause:
Incorrect welding parameters
Remedy:
Correct settings
Cause:
Poor grounding (earthing) connection
Remedy:
Ensure good contact to workpiece
Cause:
Too little or no shielding gas
Remedy:
Check the pressure regulator, gas hose, gas solenoid valve and wel-
ding torch shielding gas connection. On gas-cooled welding torches,
inspect the gas seals, use a suitable inner liner
Cause:
Welding torch is leaking
Remedy:
Replace welding torch
Cause:
Contact tip is too large or worn out
Remedy:
Replace contact tip
Cause:
Wrong wire alloy or wrong wire diameter
Remedy:
Check wirespool/basket-type spool in use
Cause:
Wrong wire alloy or wrong wire diameter
Remedy:
Check weldability of the base material
Cause:
The shielding gas is not suitable for this wire alloy
Remedy:
Use the correct shielding gas
Cause:
Unfavourable welding conditions: shielding gas is contaminated (by
moisture, air), inadequate gas shield (weld pool "boiling", draughts),
contaminants in the workpiece (rust, paint, grease)
Remedy:
Optimise the 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 a gas-tight seal
Cause:
Welding spatter in the gas nozzle
Remedy:
Remove welding spatter
Cause:
Turbulence caused by too high a rate of shielding gas flow
Remedy:
Reduce shielding gas flow rate, recommended:
shielding gas flow rate (l/min) = wire diameter (mm) x 10
(e.g. 16 l/min for 1.6 mm wire electrode)
Cause:
Distance between the welding torch and the workpiece too great
Remedy:
Reduce the distance between the welding torch and the workpiece
(approx. 10 - 15 mm / 0.39 - 0.59 in.)
Cause:
Tilt angle of the welding torch is too great
Remedy:
Reduce the tilt angle of the welding torch
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