Design and function
TIG welding
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099-005507-EW501
13.09.2018
5.5.4
Operating modes (functional sequences)
5.5.4.1 Explanation of signs and functions
Symbol Meaning
Press torch trigger
Release torch trigger
Tap torch trigger (press briefly and release)
Shielding gas flowing
I
Welding output
Gas pre-flows
Gas post-flows
Non-latched
Special, non-latched
Latched
Special, latched
t
Time
P
START
Ignition program
P
A
Main program
P
B
Reduced main program
P
END
End program
tS1
Slope duration from PSTART to PA
5.5.4.2 Automatic cut-out
The welding machine ends the ignition process or the welding process with an
• ignition fault (no welding current flows within 5 s after the start signal)
• arc interruption (arc is intrerrupted for longer than 5 s)