Cause
Faulty wire feeder.
Solution
Replace the faulty component.
Contact the nearest service centre to have the sys-
tem repaired.
Cause
Damaged torch liner.
Solution
Replace the faulty component.
Contact the nearest service centre to have the sys-
tem repaired.
Cause
Incorrect spindle clutch or misadjusted rolls locking
devices.
Solution
Release the clutch.
Increase the rolls locking pressure.
Arc instability
Cause
Insufficient shielding gas.
Solution
Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good condition.
Cause
Humidity in the welding gas.
Solution
Always use quality materials and products.
Ensure the gas supply system is always in perfect
condition.
Cause
Incorrect welding parameters.
Solution
Check the welding system carefully.
Contact the nearest service centre to have the sys-
tem repaired.
Excessive spatter
Cause
Incorrect arc length.
Solution
Decrease the distance between the electrode and
the piece.
Decrease the welding voltage.
Cause
Incorrect welding parameters.
Solution
Decrease the welding voltage.
Cause
Incorrect arc regulation
Solution
Increase the equivalent circuit inductive value setting.
Cause
Insufficient shielding gas.
Solution
Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good conditions.
Cause
Incorrect welding mode.
Solution
Decrease the torch angle.
Insufficient penetration
Cause
Incorrect welding mode.
Solution
Decrease the welding travel speed.
Cause
Incorrect welding parameters.
Solution
Increase the welding current.
Cause
Incorrect electrode.
Solution
Use a smaller diameter electrode.
Cause
Incorrect edge preparation.
Solution
Increase the chamfering.
56
Cause
Incorrect earth connection.
Solution
Earth the system correctly
Read the paragraph "Installation ".
Cause
Pieces to be welded too big.
Solution
Increase the welding current.
Slag inclusions
Cause
Poor cleanliness.
Solution
Clean the pieces accurately before welding.
Cause
Electrode diameter too big.
Solution
Use a smaller diameter electrode.
Cause
Incorrect edge preparation.
Solution
Increase the chamfering.
Cause
Incorrect welding mode.
Solution
Decrease the distance between the electrode and
the piece.
Move regularly during all the welding operations.
Tungsten inclusions
Cause
Incorrect welding parameters.
Solution
Decrease the welding voltage.
Use a bigger diameter electrode.
Cause
Incorrect electrode.
Solution
Always use quality materials and products.
Sharpen the electrode carefully.
Cause
Incorrect welding mode.
Solution
Avoid contact between the electrode and the weld pool.
Blowholes
Cause
Insufficient shielding gas.
Solution
Adjust the gas flow.
Check that the diffuser and the gas nozzle of the
torch are in good condition.
Sticking
Cause
Incorrect arc length.
Solution
Increase the distance between the electrode and
the piece.
Increase the welding voltage.
Cause
Incorrect welding parameters.
Solution
Increase the welding current.
Cause
Incorrect welding mode.
Solution
Angle the torch more.
Cause
Pieces to be welded too big.
Solution
Increase the welding current.
Increase the welding voltage.
Cause
Incorrect arc regulation.
Solution
Increase the equivalent circuit inductive value setting.
Undercuts
Cause
Incorrect welding parameters.
Solution
Decrease the welding voltage.
Use a smaller diameter electrode.