Tacking Function - Fronius TransTig 1750 Puls Operating Instructions Manual

TIG pulsing - welding current curve
Legend:
I
I
t
t
*) (1/F-P = time interval between two pulses)

Tacking function

The power source has a tacking function.
When a time period is specified for the tAC (tacking) setup parameter, the tacking function
is assigned to the 2-step mode and 4-step mode. The operating sequence of the modes
remains unchanged.
During this period, a pulsed welding current is present that makes the weld pool run togeth-
er better when two parts are being tacked.
How the tacking function works:
Tacking function - welding current curve
Legend:
tAC
56
I
I
1
I
S
Starting current
S
End current
E
Upslope
up
Downslope
Down
I
I
1
I
S
Duration of pulsed welding current for the tacking process
1/F-P
dcY
t
up
F-P
dcY
I-G
I
1
tAC
t
up
I
E
t
down
Pulse frequency *)
Duty cycle
Ground current
Main current
I
E
t
down
t
t