Non-Latched Mode - EWM T4.07 Operating Instructions Manual

Functional characteristics
TIG welding
5.1.4.2

Non-latched mode

Selection
Sequence
1st cycle:
• Press torch trigger 1 and hold down.
• Gas pre-flow time
• HF ignition pulses jump from the electrode to the workpiece. The arc ignites.
• The welding current flows and immediately assumes the value of the ignition current
• HF switches off.
• The welding current ramps up to the main current
If torch trigger 2 is pressed together with torch trigger 1 during the main current phase, the welding cur-
rent decreases to the secondary current
If torch trigger 2 is released, the welding current increases again to the main current AMP.
2 nd cycle:
• Release torch trigger 1.
• The main current falls to the end-crater current
If the 1 torch trigger is pressed during the down-slope time,
st
the welding current returns to the set main current AMP.
• Main current reaches the end-crater current
• Set gas post-flow time
When the foot-operated remote control is connected, the machine switches automatically to non-latched
operation. The up- and down-slopes are switched off.
18
Figure 5-4
Figure 5-5
elapses.
(AMP%).
elapses.
(AMP) in the selected up-slope time
(minimum current) in the set down-slope time
; the arc is extinguished.
.
.
.
099-00T407-EW501
14.07.2020