Non-Latched Mode - EWM Tetrix 180 Smart TGD Operating Instructions Manual

Design and function
TIG welding
5.6.8.2

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.
30
(minimum current).
end
Figure 5-10
, the arc extinguishes.
end
NOTE
.
start
099-000124-EW501
29.07.2011