Design and function
TIG welding
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299-020200-TWD01
14.07.2017
5.3.7.4 Average value pulsing
Once the function is activated, the red signal lights for the main current AMP and secondary current
AMP% light up at the same time.
Average value pulse welding means that the system switches between two currents periodically, an
average current value (AMP), a pulse current (Ipuls), a balance (
) and a frequency (
) having been
defined first. The predefined ampere current average value is decisive, the pulse current (Ipuls) is defined
by the
parameter as a percentage of the average current value (AMP).
The pulse pause current (IPP) is not set; the machine control calculates the value instead to ensure that
the average value of the welding current (AMP) is maintained. For average value pulsing, the
current
is the secondary current only, activated with the torch trigger.
Figure 5-18
AMP = main current (average value), e.g. 100 A
Ipuls = pulse current =
x AMP, e.g. 140% x 100 A = 140 A
IPP = pulse pause current
Tpuls = duration of one pulse cycle = 1/
, e.g. 1/100 Hz = 10 ms
= balance
Selection
Figure 5-19
5.3.8
TIG antistick
The function prevents uncontrolled re-ignition following the sticking of the tungsten electrode in the weld
pool by switching off the welding current. In addition, wear at the tungsten electrode is reduced.
After triggering the function the machine immediately switches to the gas post-flow process phase. The
welder starts the new process again at the first cycle. The user can switch the function on or off
(parameter
)
> see 5.9 chapter
.
