Design and function
TIG welding
099-005546-EW501
7.12.2020
49
Latched mode
Figure 5-35
1st cycle
• Press and hold torch trigger.
• Shielding gas is expelled (gas pre-flows).
The arc is ignited using liftarc.
• The welding current flows with the value set for the starting current I
start
.
2nd cycle
• Release torch trigger.
• Welding current increases to the main current in the set upslope time.
3rd cycle
• Press and hold torch trigger.
• The main current falls in the set downslope time to the end-crater current I
end
.
4th cycle
• Release torch trigger, arc is extinguished.
• Gas post-flow time elapses.
The welding process is terminated immediately if the torch trigger is released during the
downslope time.
The welding current drops to zero and the gas post-flow time begins.
