EWM T 4.06 - AC/DC Smart 2.0 Operating Instructions Manual page 22

Functional characteristics
TIG welding
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible, how-
ever > see 4.1.4 chapter.
Sequence:
•
Press torch trigger and hold down.
•
The gas pre-flow time elapses.
•
HF start pulses jump from the electrode to the workpiece. The arc ignites.
The welding current flows and immediately assumes the value of the ignition current
•
HF switches off.
•
The welding current ramps up to the main current
The process ends when the set spotArc.time elapses or by releasing the torch trigger. With the spotArc
function enabled, the Automatic Puls pulse variant is activated as well. If required, the function can be
disabled by pressing the pulsed welding push-button.
22
Figure 4-11
(AMP) within the set up-slope time .
099-00T406-EW501
13.07.2017