Design and function
TIG welding
099-002058-EW501
26.11.2015
29
5.6.6.2 TIG non-latched operation
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.
Figure 5-8
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 in the set up-slope time to the main current AMP.
If torch trigger 2 is pressed together with torch trigger 1 during the main current phase, the
welding current decreases to the secondary current AMP%.
If torch trigger 2 is released, the welding current increases again to the main current AMP.
2nd cycle:
• Release torch trigger 1.
• The main current decreases in the set down-slope time to the
end-crater current I
end
(minimum current).
If torch trigger 1 is pressed during the down-slope time,
the welding current increases again to the set main current AMP.
• The main current reaches the end-crater current I
end
, the arc extinguishes.
• The set gas post-flow time elapses.
