Tig Pulsing - Fronius AccuPocket 150/400 TIG Operating Instructions Manual

TIG pulsing

TIG pulsing is TIG welding with a pulsing welding current. It is used for out-of-
position welding of steel pipes or when welding thin sheets.
In these applications, the welding current set at the start of welding is not always
ideal for the whole welding process:
-
-
Setting range: 0.5 - 990 Hz
Operating principle:
A low base current I-G rises steeply to the significantly higher pulse current I-P
and, depending on the set dcY (duty cycle) time, drops back to the base current
I-G.
This results in an average for the main current of I-1.
During TIG pulsing, small sections of the welding location melt quickly and then
solidify again quickly.
Activating TIG pulsing / setting the pulse frequency:
1
2
TIG pulsing - welding current curve
Legend:
I-S
I-E
t
t
*) (1/F-P = time interval between two pulses)
48
if the amperage is too low, the base material will not melt sufficiently
if overheating occurs, the liquid weld pool may drip
Press the setting value button until
the TIG pulsing indicator lights up
Turn the adjusting dial until the desired frequency value (Hz) is reached
- power source is ready for welding
I
I-P
I-S
I-G
Starting current
Final current
UpSlope
up
DownSlope
Down
1/F-P
dcY
t
up
I-P
F-P
dcY
I-G
I-1
I-E
t
down
Pulse current
Pulse frequency *)
Duty cycle
Base current
Main current
t