EWM T 4.00 - AC/DC Comfort 2.0 Operating Instruction page 26

Welding procedure
TIG welding
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible,
however > see 4.1.6.2 chapter.
Sequence:
•
Press torch trigger and hold down.
•
The gas pre-flow time elapses.
•
HF ignition 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.
When switching on the spotArc function, Automatic pulsing is switched on as well. Any other
pulsing variant can be selected as well, or no pulsing at all.
26
Figure 4-11
(AMP) in the selected up-slope time.
099-00T400-EW501
21.10.2016