Fronius TransTig 4000 - TIG Welding Operations: 2-Step and 4-Step Modes

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2-step mode - Welding: Pull back and hold the torch trigger
- End of welding: Release the torch trigger
2-step mode
4-step mode - Welding start-up with starting current I
S
: Pull back and hold the torch trigger
- Welding with main current I
1
: Release the torch trigger
- Lowering to final current I
E
: Pull back and hold the torch trigger
- End of welding: Release the torch trigger
4-step mode
*) Intermediate lowering
Intermediate lowering during the main current phase reduces the welding current to the
specified reduced current I-2 reduced.
- To activate intermediate lowering, push forward and hold the torch trigger
- To revert to the main current, release the torch trigger
I
t
I
1
G-L / G-H
GPr tSPU
down
I
t
I
1
GPr
I
S
tSPU
down
I
E
I-2
G-L
G-H
I
1
*)