Design and function
TIG welding
099-005548-EW501
27.10.2017
47
Non-latched mode
Figure 5-37
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
.
• Welding current increases to the main current in the set upslope time.
2nd cycle
• Release torch trigger.
• The main current falls in the set downslope time to the end-crater current I
end
.
If the torch trigger is pressed again during the downslope time,
the welding current returns to the set main current!
• The main current reaches the end-crater current I
end
, the arc extinguishes.
• Gas post-flow time elapses.
