Igniting The Arc; Finishing Welding - Fronius TPS 320i Operating Instructions Manual

Igniting the arc

The welding arc is ignited by touching the workpiece with the tungsten electrode.
Placing the gas nozzle down
Arc ignites when electrode is touched
down on workpiece
Arc ignited - welding commences

Finishing welding

1
2
92
Lift the TIG gas-valve torch away from the workpiece until the arc goes out.
IMPORTANT! To protect the tungsten electrode, ensure that the shielding gas at the
end of welding flows for long enough to allow the tungsten electrode to cool sufficient-
ly.
Close the gas stop valve on the TIG gas-valve torch
Place the gas nozzle on the ignition location so that
1
there is a gap of 2-3 mm (0.08 - 0.12 in.) between
the tip of the tungsten electrode and the workpiece
Gradually tilt the welding torch up until the tungsten
2
electrode touches the workpiece
Raise the welding torch and pivot it into the normal
3
position - the arc ignites
Carry out welding
4