Welding procedure
TIG welding
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099-00T400-EW501
21.10.2016
4.1.10.3 Average value pulsing
Average value pulsing is a variant of pulsing, with the particularity that the power source will always
maintain the preset average value. This makes this method especially suitable for welding according to
welding procedure specifications.
The parameter
must be switched to
in the machine configuration menu to enable this pulse
variant. See the "Metallurgical pulsing" pulse variant for other parameter settings.
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 4-22
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 =
x Tpuls, e.g. 30% x 1 s = 0.3 s
Selection
Figure 4-23
