Latched Mode - EWM Tetrix 451 AC/DC AW FW Operating Instructions Manual

Design and function
TIG Synergic operating principle
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
current decreases to the secondary current
If torch trigger 2 is released, the welding current increases again to the main current AMP in the set slope
time . The parameters
2nd cycle:
•
Release torch trigger 1.
•
The main current falls to the end-crater current
If the 1st torch trigger is pressed during the down-slope time,
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.

5.7.10.3 Latched mode

Selection
60
Figure 5-34
elapses.
(AMP%) in the set slope time
and can be set in the Expert menu (TIG) > see 5.7.15 chapter.
elapses.
Figure 5-35
(AMP) in the selected up-slope time
(minimum current) in the set down-slope time
; the arc is extinguished.
.
.
.
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099-000115-EW501
20.11.2017