3
Function specification
3/7
3.4
Function sequence of TIG latched operation with
UP/DOWN-SLOPE
E1
Rotary switch in the position (latched with slope)
N1
Changeover switch in the position (HF ignition on)
I
S
I
1
I
2
I
E
Down-Slope
Up-Slope
t
W
elding current
Gas pre
flow time
Gas post-
flow time
secondary current
Press 1st torch trigger
(1st step)
Release 1st torch trigger
(2nd step)
Press 1st torch trigger
(3rd step)
Release 1st torch trigger
(4th step)
Fig. 4
Latched function sequence
1st step
•
Operate the torch trigger.
•
The gas pre-flow time passes.
•
HF ignition pulses jump from the electrode to the workpiece, the arc ignites.
•
Welding current flows and immediately assumes the ignition current value set (search arc at
minimum setting).
•
HF is switched off.
