Fronius TransTig 1600 - Special 2-Step Mode; Special 2-Step Mode Operation

10
- Activated from TIG torch trigger
- Mainly used for tack welding
- In the "PRESETTINGS LEVEL___" (see "Working with the program levels"), TIG
parameters, StS must be set to ON
Functional sequence
1. Pull back and hold trigger
- Gas pre-flow time elapses
- Arc ignites at the pre-set start arc value I
S
(with HF ignition: HF cuts out automatical-
ly after the ignition cycle)
- Welding current rises directly (without upslope) to welding current I
H
- LED (10) lights up
2. Release trigger
- Arc goes out (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. 10 Functional sequence in special 2-step mode
Start of cycle
I
Pull back torch trigger and hold it down
Release the torch trigger
Gas pre-flow time
End of welding
Gas post-flow time
Arc ignition
Welding with
pre-set main current I
H
I
H
t
Special 2-step
mode