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Poor welding properties
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Incorrect welding parameters
Check the settings
Poor connection to earth (ground)
Ensure good contact to workpiece
Not enough shielding gas, or none at all
Check the pressure regulator, gas hose, gas solenoid valve and torch
gas connection. On gas-cooled welding torches, inspect the gas seals,
use a suitable inner liner.
Connections leaking
Tighten connections
Contact tube does not fit or is damaged
Change the contact tube
Wrong wire alloy or wrong wire diameter
Check the wirespool that has been inserted, check the weldability of
the base metal
The shielding gas is not suitable for this wire alloy
Use the correct shielding gas
Unfavourable welding conditions: shielding gas is contaminated (by
moisture, air), inadequate gas shielding (weld pool „boiling", drau-
ghts), contaminants in the workpiece (rust, paint, grease)
Optimise the welding conditions
Gas nozzle soiled
Remove welding spatter
Turbulence caused by too high a rate of shielding gas flow
Reduce amount of shielding gas, recommended:
shielding gas quantity (l/min) = wire diameter (mm) x 10
(e.g. 16 l/min for 1.6 mm welding wire)
Too large a distance between the contact tube and the workpiece.
Reduce the distance between the contact tube and the workpiece
(approx. 10-15 mm)
Tilt angle of the welding torch is too great
Reduce the tilt angle of the welding torch
The wirefeed components do not match the welding wire diameter
Use the correct wirefeed components
Loss of gas or extraneous air
Check leak-tightness of blow-through line and blow-through valve.
Check closure seal of blowthrough line (push-on nipple)
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