LORCH ML Serie Instructivo De Servicio página 47

MIG/MAG welding torches ML/MW GRIP
Fault
Wire burned solid in the
contact tip
Irregular wire feeder
Arc between gas nozzle
and workpiece
Erratic arc
Pore formation
Tab. 8
Troubleshooting
Cause
• Wrong parameters set
• Contact tip worn out
• Wire burn-back function set too low
• Liner/PA liner clogged
• Contact tip and wire diameter not
matched
• Wrong contact pressure set on the
wire feeder
• Spatter bridge between contact tip
and gas nozzle
• Contact tip not matched to the wire
diameter or contact tip diameter
enlarged
• Wrong welding parameters set
• Wire guide unit worn out
• Strong spattering in the gas nozzle
• Insufficient or lack of gas coverage
• Air current blows shielding gas away
11 Troubleshooting
Troubleshooting
• Check and correct setting
• Replace
• Correct
• Clean both directions with
compressed air. Replace if
necessary
• Replace contact tip
• Correct in accordance with the
operating manual for the
LORCH device
• Clean and spray gas nozzle
interior
• Check the contact tip.
Replace if necessary
• Correct the welding parameters
• Replace the wire guide
• Clean the gas nozzle
• Check the gas cylinder contents
and pressure setting
• Shield the welding area with
partitions
EN - 23