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5.8.5.2
Non-latched mode
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
•
HF is switched off.
•
The welding current increases with the adjusted up-slope time to the main current AMP.
If torch trigger 2 is pressed in addition to torch trigger 1 during the main current phase, the
welding current drops at the slope time set (tS1) to the secondary current AMP%.
After torch trigger 2 is released, the welding current rises at the slope time set (tS2) back to the
main current AMP.
2nd cycle:
•
Release torch trigger 1.
•
The main current falls in the set down-slope time to the
end-crater current I
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
•
The set gas post-flow time elapses.
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.
099-000128-EW501
16.07.2014
(minimum current).
end
Design and function
Figure 5-13
, the arc extinguishes.
end
NOTE
TIG welding
.
start
39
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