Design and function
TIG welding
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29.9.2022
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5.2.4 Pulse welding
5.2.4.1 Automated pulses
The automated pulses are used with tacking and spot welding of workpieces in particular.
An oscillation in the molten pool is produced by the current-dependent pulse frequency and balance,
which positively influences the ability to bridge the air gap. The pulse parameters required are automati-
cally specified by the machine control.
Figure 5-15
5.2.5 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 (parame-
ter
)
> see 5.8 chapter
.
5.2.6 activArc
The EWM activArc process, thanks to the highly dynamic controller system, ensures that the power sup-
plied is kept virtually constant in the event of changes in the distance between the welding torch and the
weld pool, e.g. during manual welding. Voltage losses as a result of a shortening of the distance between
the torch and molten pool are compensated by a current rise (ampere per volt - A/V), and vice versa. This
helps prevents the tungsten electrode sticking in the molten pool and the tungsten inclusions are reduced.
4 s
Figure 5-16
Parameter setting
The activArc parameter (control) can be adjusted specifically for the welding task (panel thick-
ness)
> see 5.2.9 chapter
.
