EWM Tetrix 451 AC/DC AW FW Operating Instructions Manual page 61

Sequence
st
1 cycle
•
Press torch trigger 1
•
HF start pulses jump from the electrode to the workpiece. The arc ignites.
•
Welding current flows and immediately assumes the set ignition current
setting). HF switches off.
nd
2 cycle
•
Release torch trigger 1.
•
The welding current ramps up to the main current
Switching from the main current AMP to secondary current
•
Press torch trigger 2 or
•
Tap torch trigger 1 (torch modes 1–6).
If torch trigger 2 is pressed together with torch trigger 1 during the main current phase, the welding
current decreases to the secondary current
Once torch trigger 2 is released, the welding current increases again to the main current AMP in the set
slope time . The parameters
rd
3 cycle
•
Press torch trigger 1.
•
The main current decreases to the end-crater current
Once the main current phase
tapping torch trigger 1 (third cycle will be omitted).
th
4 cycle
•
Release torch trigger 1; arc is extinguished.
•
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.
Alternative welding start (tapping start):
For the alternative welding start, the durations of the first and second cycle are defined by the set process
times only (tapping the torch trigger in the gas pre-low phase
To activate this function, set a two-digit torch mode (11-1x) at the machine control. This function can also
be deactivated completely when required (welding stop by tapping remains active). To do so, the
parameter must be switched to
099-000115-EW501
20.11.2017
Figure 5-36
, the gas pre-flow time elapses.
(AMP%) in the set slope time
and can be set in the Expert menu (TIG) > see 5.7.15 chapter.
AMP has been reached, you can shorten the welding sequence by
runs.
in the machine configuration menu > see 5.17 chapter.
Design and function
TIG Synergic operating principle
(search arc at minimum
(AMP) in the selected up-slope time
(AMP%):
.
within the set down-slope time
).
.
.
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