Functional characteristics
TIG welding
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099-00T405-EW501
02.07.2020
As an example the process is shown with HF ignition. Arc ignition with lift arc is also possible, how-
ever
> see 5.1.3 chapter
.
Selecting the process activation type for the welding process
> see 5.6 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
. The arc igni-
tes and the previously set ignition current
flows.
The main current phase
ends when the set
spot time elapses.
For long-time spot welding only (parameter
=
):
The welding current decreases to the end-crater current
within the set down-slope time
.
The gas post-flow time
elapses and the welding process ends.
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.
5.1.4.6 Non-latched operation, version C
Figure 5-12
1st cycle
• Press torch trigger 1
, the gas pre-flow time elapses.
• HF ignition pulses jump from the electrode to the workpiece. The arc ignites.
• Welding current flows and immediately assumes the set ignition current
(search arc at minimum
setting). HF switches off.
2nd cycle
• Release torch trigger 1.
• The welding current ramps up to the main current AMP in the selected up-slope time
.
Pressing torch trigger 1 starts the slope
from main current AMP to secondary current
AMP%. Re-
leasing the torch trigger starts the slope
from the secondary current AMP% and back to the main cur-
rent AMP. This process can be repeated as frequently as required.
The welding process is stopped by interrupting the arc in the secondary current (remove the welding torch
from the workpiece until the arc is extinguished, no re-ignition).
The slope times
and
can be set in the Expert menu
> see 5.1.10 chapter
.
This operating mode must be enabled (parameter
)
> see 5.6 chapter
.