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TIG pulsing TIG pulsing is TIG welding with a pulsing welding current. It is used for out-of-position weld-
ing 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:
- if the amperage is too low, the base material will not melt sufficiently
- if overheating occurs, the liquid weld pool may drip.
Setting range: 0.5 - 10 Hz
Operating principle:
A low base current I-G rises steeply to the significantly higher pulse current I-P and, de-
pending 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.
In TIG pulsing, small sections of the welding location melt quickly and then solidify again
quickly.
Activating TIG pulsing / setting the pulse frequency:
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
TIG pulsing - welding current curve
Key: I-P Pulse current
I-S Starting current F-P Pulse frequency *)
I-E Final current dcY Duty cycle
t
up
UpSlope I-G Base current
t
Down
Downslope I-1 Main current
*) (1/F-P = time interval between two pulses)
1
2
1/F-P
I-1
I-P
I-G
I
t
t
up
t
down
I-S
I-E
dcY
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