9
TIG operating modes
General remarks
Warning! Operating the equipment incorrectly can cause serious injury and
damage. Do not use the functions described here until you have read and
completely understood all of the following documents:
- these Operating Instructions
- all “Operating Instructions” for the system components, especially the
“Safety rules”
- Activated from TIG torch trigger
- Mainly used for tack welding
- In the "PRESETTINGS LEVEL___" program level (TIG parameters), StS must be
set to OFF
Functional sequence
1. Pull back and hold trigger
- Gas pre-flow time elapses
- LArc ignites at the pre-set start arc value I
S
(with HF ignition: HF cuts out automati-
cally after the ignition cycle)
- After ignition, the welding current rises via the internally pre-set upslope to the
welding current I
H
- LED (10) lights up
2. Release trigger
- Arc goes out (with or without downslope)
- Internally pre-set gas post-flow time elapses
If a TR 52mc pedal remote-control unit is being used, the machine automatically
switches over to the 2-step mode.
Fig. 9 Functional sequence in 2-step operating mode
End of welding with
Down-Slope off
crater-fill I
E
Gas post-flow time
Pull back torch trigger and hold it down
Release the torch trigger
I
H
t
Start of cycle
Gas pre-flow time
Current rise via up-slope
Arc ignition with start arc I
S
Welding with pre-set
main current I
H
I
2-step mode
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