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As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible,
however > see 4.1.4 chapter.
Selecting the process activation type for the welding process > see 4.6 chapter.
Up-slope and down-slope times possible for long spot time setting range (0.01–20.0 s) only.
Press and release torch trigger (tap) to activate the welding process.
Touch the torch gas nozzle and tungsten electrode tip carefully against the workpiece.
Incline the welding torch over the torch gas nozzle until there is a gap of approx. 2–3 mm between the
electrode tip and the workpiece. Shielding gas flows during the set gas pre-flow time
ignites and the previously set ignition current
The main current phase
For long-time spot welding only (parameter
The welding current decreases to the end-crater current
The gas post-flow time
Press and release the torch trigger (tap) to reactivate the welding process (only for separate
process activation). Touching the welding torch with the tungsten electrode tip against the
workpiece again will initiate the next welding processes.
4.1.6
TIG activArc welding
The EWM activArc process, thanks to the highly dynamic controller system, ensures that the power
supplied 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.
Selection
Setting
Parameter setting
The activArc parameter (control) can be adjusted specifically for the welding task (panel
thickness) > see 4.1.11 chapter.
4.1.7
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
099-00T402-EW501
24.04.2018
ends when the set
elapses and the welding process ends.
) > see 4.6 chapter.
Functional characteristics
flows.
spot time elapses.
=
):
within the set down-slope time
Figure 4-18
TIG welding
. The arc
.
EXIT
4s
27
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