Fronius TransTig 2200 Instructions De Service page 113

Tacking function
(continued)
Fig.16 Tacking function - welding current curve
Legend:
-
-
-
-
-
-
Important! The following points apply to the pulsed welding current:
-
The pulsed welding current begins
-
-
Depending on what tAC time has been set, the pulsed welding current may continue up
to, and include, the final current phase I
After the tAC time has elapsed, welding continues at constant welding amperage.
I
I
1
I
S
tAC Duration of pulsed current for the tacking operation
I Starting current
S
I Final (i.e. "end") current
E
t Upslope
Up
t Downslope
Down
I Main current
1
The power source automatically regulates the pulsing parameters as a function of
the pre-set main current I
at the end of the starting current phase I
with the upslope phase t
up
tAC
t
up
.
1
S
(if tAC is set to "ON").
E
31
I
E
t
t
down