Design and function
TIG welding
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14.04.2015
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Figure 5-17
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible, however-
See 5.7.7 Arc ignition chapter.
Sequence:
• Press and hold torch trigger 1.
• 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 set for the ignition current I
start
.
• HF is switched off.
• The welding current increases in the adjusted up-slope time to the main current AMP.
The process ends when the set spotArc time elapses or if the torch trigger is released
prematurely.
spotArc/pulse variants table:
Process
Pulse variants
TIG DC
Automated pulses (factory setting)
(lights up in green)
Pulses (thermal pulses)
(lights up in red)
kHz pulse (metallurgic pulses)
No pulses
