Fronius MagicWave 1700 Job, Operating Instructions Manual

Page: 76 / 148

76
*) (1/F-P = time interval between two pulses)
Tacking function
The tacking function is available for the TIG DC welding process.
When a time period is specified for the tAC (tacking) setup parameter, the tacking function
is assigned to 2-step mode and 4-step mode. The operating sequence of the modes re -
mains 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.
Mode of operation of tacking function when the TIG DC welding process is selected:
Tacking function - welding current curve
Mode of operation of TIG pulsing when TIG DC welding is selected:
TIG pulsing - welding current curve
Legend:
I
S
Starting current F-P Pulse frequency *)
I
E
Final 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
tAC
I
1
I
t
t
up
t
down
I
S
I
E