Fronius Robacta Drive Manual De Instrucciones página 74

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74
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.
Welding torch leaking
Exchange the welding torch
Contact tube either too big, or worn out
Change the contact tube
Wrong wire alloy and/or wrong wire diameter
Check the wire spool 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
Welding spatter in the gas nozzle
Remove the welding spatter
Turbulence caused by too high a rate of shielding-gas flow
Reduce the shielding-gas flow-rate. Recommendation:
Shielding-gas flow-rate (l/min) = wire diameter (mm) x 10
(e.g. 16 l/min for a 1.6 mm wire)
Too large a distance between the torch and the workpiece.
Reduce the distance between the torch and the workpiece (recom-
mended: 10-15 mm)
Tilt angle of the welding torch is too large
Reduce the tilt angle of the welding torch
Wrong diameter of wirefeed components
Use wirefeed components of the correct diameter
Incorrect PushPull equalisation
Select the correct number for the PushPull unit (Robacta Drive). See
Operating Instructions of PushPull unit
Loss of gas or extraneous air