Design and function
TIG welding
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099-000124-EW501
29.07.2011
5.6.8.4
SpotArc
The TIG SpotArc function is activated with the pulse variant automated frequencies by default, because
this combination produces the most effective results.
Selecting and setting TIG spotArc
Operating
element
Action Result
Signal light
comes on
The spot time can be set for approx. 4 s using the "Welding parameter
setting" rotary dial (spot time setting range 0.01 s to 20.0 s)
Set spot time "tP"
The TIG spotArc process is switched on with the pulse variant "TIG
automated pulses" by default.
TIG automated pulses (frequency and balance)
NOTE
The up-slope and down-slope times should be set to “0” to achieve an effective result.
Figure 5-12
Sequence:
• Press and hold torch trigger 1.
• The gas pre-flow time elapses.
• HF ignition pulses jump from the electrode to the workpiece, the arc ignites.
• The welding current flows and immediately assumes the value set for the ignition current I
start
.
• HF
is
switched
off.
• The welding current increases in the adjusted up-slope time to the main current AMP.
NOTE
The process ends when the set spotArc time elapses or if the torch trigger is released
prematurely.
