Design and function
TIG welding
099-000151-EW501
18.01.2013
33
5.6.9.1
Non-latched mode
I
I
start
AMP
t
Up
1.
2.
t
Down
I
end
t
AMP%
Figure 5-11
1st cycle:
• 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 with the adjusted up-slope time to the main current AMP.
Switching from main current AMP to secondary current AMP%:
Press torch trigger 2 or Tap torch trigger 1
2nd cycle:
• Release torch trigger 1.
• The main current falls in the set down-slope time to the
end-crater current I
end
(minimum current).
If the 1st torch trigger is pressed during the down-slope time, the welding current returns to the
main current AMP set.
• The main current reaches the end-crater current I
end
, the arc extinguishes.
• The set gas post-flow time elapses.
NOTE
When the
foot-operated remote control
RTF is connected, the machine switches
automatically to non-latched operation.
The up- and down-slopes are switched off.
