REHM TIGER 180 AC/DC ULTRA, Руководство по эксплуатации

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Function description
22
4.6.8 Welding current I
2
The settings for the welding current I
2
[4] is performed as described in Section
4.6.1. The use of welding current I
2
only makes sense with TIG welding and
therefore is only displayed when TIG welding. Welding current I
2
is used for
pulsing (see Section 4.6.7) and for twin-current control:
Twin-current control:
General function:
Twin-current control enables the user to work with 2 different, pre-set currents
when using a torch with 2 triggers. This makes it possible to switch between the
two values I
1
and I
2
when welding.
Switching to I
2
is effective for as long as torch trigger 2 is actuated. When torch
trigger 2 is released the system immediately switches back to I
1
.
Switching example:

From high-current to low-current or vice-versa, for example when changing
the welding position.

Manual pulsing (see Section 4.6.10)

Starting at high current I
1
for warming the workpiece, then welding with low-
current I
2
.

Starting with low-current I
1
at an edge on the workpiece, then welding with
high-current I.
Switching is possible in both 2 and 4 cycle modes without pulsing.
The current I
2
is set either by activating the setting option I
2
, or also very quickly
and easily by actuating torch trigger 2 before the welding process. When the
torch trigger 2 is held down the current value I
2
is shown in the digital display and
can be altered by turning the push and rotate knob.
4.6.9 I
2
-Pulse time t
2
The setting is performed according to I
1
-pulse time t
1
[4] (see Section 4.6.7).
4.6.10 Current slope-down time t
d
The settings for the current slope-down time t
d
[4] is performed as described in
Section 4.6.1. The current slope-down time is the period in which the welding
current decreases linearly to the end-crater current. With 2 cycle welding the
current slope-down time begins immediately after release of torch trigger 1. With
4 cycle welding the slope-down time begins during welding with the actuation of
torch trigger 1. The slow slope-down of the welding current prevents the
occurrence of end craters.
Manual pulsing:
If, with the TIG 2 cycle function, torch trigger 1 is actuated during the slope-down
time, then the welding current immediately jumps to the value used for welding.
The average energy is infinitely variable and can be directly selected depending
on the time at which the torch trigger is actuated during slope-down.