7 TIG WELDING OPERATION
0463 703 001
GB
-57-
7.3
DC TIG Lift Arc and 2-stroke/4-stroke Illustration
2-stroke and 4-stroke welding process illustrated
The trigger is used and some current flows already when lifting away the electrode to strike it.
2- Stroke
In 2-stroke mode, press the TIG torch trigger switch (1) to start the shielding gas flow and initiate the arc.
The current slopes up to the set current value. Release the trigger switch (2) to start to slope down the
current and terminate the arc. The shielding gas will continue to flow in order to protect the weld and
the tungsten electrode.
Gas pre flow
Gas post flow
Slope up
Slope do
wn
4- Stroke
In 4-stroke mode, press the TIG torch trigger switch (1) to start shielding gas flow and initiate the arc at
a pilot level. Release the trigger switch (2) to slope up the current to the set current value. To stop the
welding, press the trigger switch again (3). The current will slope down to the pilot level again. Release
the trigger switch (4) to terminate the arc. The shielding gas will continue to flow in order to protect the
weld and the tungsten electrode.
Gas pre flow
Gas post flow
Slope up
Slope do
wn
