Latched Mode - EWM TETRIX 351 AC/DC COMFORT activArc Operating Instructions Manual

Functional characteristics
TIG welding
5.2.5.3

Latched mode

I
Step 1
• Press torch trigger 1, the gas pre-flow time elapses.
• HF ignition pulses jump from the electrode to the workpiece, the arc ignites.
• Welding current flows and immediately assumes the ignition current value set (search arc at minimum
setting). HF is switched off.
Step 2
• Release torch trigger 1.
• The welding current increases with the set up-slope time to the main current AMP.
Switching from main current AMP to secondary current AMP%:
• Press torch trigger 2 or
• Tap torch trigger 1 *
The slope times can be set (see chapter "Advanced settings", section "Setting slope times for
secondary current AMP% or pulse edges".
Step 3
• Press torch trigger 1.
• The main current drops with the set down-slope time to the end-crater current I
Step 4
• Release torch trigger 1, the arc extinguishes.
• The set gas post-flow time begins.
Immediate termination of the welding procedure without down-slope and end-crater current:
• Briefly press the 1st torch trigger (3rd and 4th step).
The current drops to zero and the gas post-flow time begins.
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.
36
1.
AMP
I
start
t
Up
2. 3.
AMP%
t
Down
Figure 5-5
NOTE
4.
I
end
t
(minimum current).
end
Item No.: 099-000108-EWM01