Latched Mode - EWM T 4.00 - AC/DC Comfort 2.0 Operating Instruction

Welding procedure
TIG welding
4.1.7.3

Latched mode

1st cycle
•
Press torch trigger 1; gas pre-flow time
•
HF ignition 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.
2nd 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).
The slope times
3rd cycle
•
Press torch trigger 1.
•
The main current decreases to the end-crater current
4th cycle
•
Release torch trigger 1; arc is extinguished.
•
Set gas post-flow time
Ending the welding process immediately without a down-slope or end-crater current:
•
Press the 1st torch trigger briefly > 3rd and 4th cycles (torch modes 11–16).
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.
A double-digit torch mode (11-x) needs to be set at the welding machine control to use the
alternative welding start (tapping start). The number of torch modes available depends on the
machine type.
From mode 11 upwards, the tapping start function can also be deactivated when required
(welding stop by tapping remains active). To do so, the
the machine configuration menu > see 4.7 chapter.
24
and can be set > see 4.1.20 chapter.
runs.
Figure 4-9
elapses.
(AMP) in the selected up-slope time
(
AMP%
within the set down-slope time
parameter must be switched to
(search arc at minimum
.
)
:
.
099-00T400-EW501
21.10.2016
in