Pulse Welding - Fronius TransPocket 150 TIG Operating Instructions Manual

(1)
(2)
DownSlope:
The DownSlope time t
Gas post-flow:
The gas post-flow can be changed in the Setup menu via the "Gas post-flow time"
parameter (Gas Post flow).

Pulse welding

Pulse welding is welding with a pulsing welding current. It is used for out-of-posi-
tion 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 - 100 Hz
Operating principle:
-
-
-
The power source controls the Duty cycle dcY parameter and base current I-G
according to the set pulse current and pulse frequency.
Pulse welding - welding current curve
Adjustable parameters:
-
-
-
-
38
Gas pre-flow
Gas post-flow
down
if the amperage is too low, the base material will not melt sufficiently
if overheating occurs, the liquid weld pool may drip
A low base current I-G rises steeply to the significantly higher pulse current
I-P and drops back to the base current I-G after the Duty cycle dcY time.
The pulse current I-P can be set on the power source.
This results in an average current that is lower than the set pulse current I-P.
During pulse welding, small sections of the welding location melt quickly and
then rapidly re-solidify.
I
I-P
I-S
I-G
I-S = starting current
I-E = final current
F-P = pulse frequency (1/F-P = time interval between two pulses)
I-P = pulse current
is 0.5 seconds and cannot be adjusted.
1/F-P
dcY
t
up
I-E
t
t
down