56
TIG pulsing - welding current curve
*) (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:
I
S
Starting current F-P Pulse frequency *)
I
E
End current dcY Duty cycle
t
up
Upslope I-G Ground current
t
Down
Downslope I
1
Main current
1/F-P
I
1
I-G
I
t
t
up
t
down
I
S
I
E
dcY
Legend:
tAC Duration of pulsed welding current for the tacking process
tAC
I
1
I
t
t
up
t
down
I
S
I
E
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