Fronius TransTig 1600 Bedienungsanleitung Seite 50

3. Pull back and hold trigger again
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Welding current drops via the downslope set on dial
the value set for the crater-fill current I
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LED lights up
4. Release trigger
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Arc goes out
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Internally pre-set gas post-flow time elapses
Pull back torch trigger and hold it down
Release the torch trigger
Pull back torch trigger and hold it down
Release the torch trigger
I
I
S
Fig. 4 Functional sequence in 4-step operating mode - without intermediate
lowering
4-step mode - with intermediate lowering (Fig.4a)
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Activated from TIG torch trigger with double-pushbutton
function
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Intermediate lowering to the reduced current I
Welding current can be lowered from the main current to the
reduced current I and back, without interrupting the weld-ing
E
sequence
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In the "PRESETTINGS LEVEL___" (see "Working with the
program-levels"), TIG parameters, SFS must be set to OFF
Pull back torch trigger and hold it down
Release the torch trigger
Push trigger forward and hold it
Release the torch trigger
Pull back and hold down the torch trigger once again
Release the torch trigger
I
I
H
I
S
Fig. 4a Functional sequence in 4-step operating mode - Variant I - with
intermediate lowering
on dial
E
I
H
I
E
E:
I
H
I
I
E
E
Important!
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Current reduction with no interruption to welding is only
to
possible when the main current is activated
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If the torch trigger is accidentally pushed forward in open
circuit, no ignition cycle takes place
Special 4-step mode - Variant I (Fig.5)
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Enables the 4-step mode to be activated from TIG torch
triggers without the double-pushbutton function
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Intermediate lowering to the reduced current I
how to set this, see "Working with the program-levels")
- Welding current can be lowered from the main current to
the reduced current I
welding sequence
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In the "PRESETTINGS LEVEL___" program level (see
"Working with the program-levels"), Parameter I3, the redu-
ced current I3 can be set as a percentage of the main current
I
H
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In the "PRESETTINGS LEVEL___" (see "Working with the
program-levels"), TIG parameters, SFS must be set to 1
t
Pull back torch trigger and hold it down
Release the torch trigger
briefly press the torch trigger (forward)
briefly press the torch trigger (forward)
Pull back torch trigger and hold it down
Release the torch trigger
I
I
S
Fig. 5 Functional sequence in special 4-step mode - Variant I
Special 4-step mode - Variant II / III / IV / V (Fig.5a/b/c/d)
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Enables the 4-step mode to be activated from TIG torch
triggers with the double-push button function
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In the "PRESETTINGS LEVEL___" (see "Working with the
program-levels"), TIG parameters,
SFS must be set to
- "2" for Variant 2
- "3" for Variant 3
- "4" for Variant 4
- "5" for Variant 5
t
4
and back, without interrupting the
3
I I
H H
I
3
Diagram showing intermediate lowering
(for details of
3
I
E
t