5 Commissioning
5/8
5.8.6.2 TIG non-latched operation
•
Adjust the appropriate key buttons or changeover switches to the following settings:
HF
I
I
start
AMP
t
Up
1.
2.
t
Down
I
end
t
Fig. 3/4: Function sequence of TIG non-latched operation
1st step:
•
Press and hold torch trigger 1.
•
The gas pre-flow time passes.
•
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.
2
nd
step:
•
Release torch trigger 1.
•
The main current falls in the adjusted down-slope time to the end-crater current I
end
(minimum
current).
•
The main current reaches the end-crater current I
end
, the arc extinguishes.
•
The gas post-flow time set passes.
If the 1st torch trigger is pressed during the down-slope time, the welding current returns to
the main current AMP set.
