Latched Mode - EWM Tetrix 350 Operating Instructions Manual

5.9.11.3 Latched mode

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.
To use the alternative welding start (tapping start) a double-digit torch mode (11-x) has
to be set at the welding machine control. The number of torch modes available depends
on the machine type. For single-digit torch modes (1-x) this function is disabled.
099-004854-EW501
19.02.2014
Design and function
Figure 5-17
NOTE
TIG Synergic operating principle
(minimum current).
end
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