EWM Tetrix 351 - Design and Function - TIG Synergic Operating Principle (Continued); SpotArc Process Sequence and Pulse Variant Selection

Design and function
TIG Synergic operating principle
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17.06.2015
Figure 5-32
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible, however-
See 5.13.7 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
TIG AC
(lights up in green)
Pulses (thermal pulses)
AC special
No pulses