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POST GAS AND PREGAS ADJUSTMENT
PREGAS (0 TO 25 SEC.)
The pregas is used, before arcing, to purge the torch and the area around the welding bead.
It also improves arcing consistency.
Advice : the longer the torch is, the longer pregas setting should be. (0.15 s/m of torch)
POSTGAS ADJUSTMENT (3 TO 20 SEC.)
The parameter sets the time while gas is still flowing after arc shutdown. It protects the weld
pool and the electrode against oxidisation when the metal is cooling down.
Advice: Increase the duration if welding in a dark area..
(Base : 25A=4sec - 50A=8sec - 75A=9sec - 100A=10sec - 125A=11sec- 150A=13sec)
ADJUST SETTINGS
The switches for post-gas & pre-gas are setted by which are located on the main PCB inside
the EXATIG. It is necessary to remove the PCB in order to access. Identify the post gas &
Pregas switch to modify the settings according the needs.
Advice: See following table for settings (ms)
COMMAND TRIGGER CONNECTOR
DB
P
L
Cabling diagram for the SRL 18 torch.
Torch 2 triggers + poten-
tiometer
WARNING: when EXATIG is not connected to EXAGON the potentiometer on the trigger does not work.
EXATIG HF
Post gas
1
P
5
torch
2
4
L
DB
torch
2
torch
3
Torch type
Torch 2 triggers
ON
1
2
1
2
0
0
1
0
0
1
1
1
0
0
1
0
0
1
1
1
0
0
1
0
0
1
Pre gas
1
1
0
0
1
0
0
1
1
1
4
3
5
2
6
1
NC
Electric diagram based on type of torch used.
Wire description
Common/Earth
Torch 1 trigger
Switch trigger 1
Switch trigger 2
Potentiomete earth
EN
The switches are in position
0000 are the default settings :
0 sec for pre-gas
3
4
8 sec. for post-gas
3
4
Pre Gas (ms)
Post Gas (ms)
0
0
Fault
Fault
0
0
0
0
0
500
2000
0
0
1000
3000
1
0
2000
4000
1
0
3000
5000
1
0
4000
6000
1
0
5000
7000
0
1
6000
8000
0
1
7000
9000
0
1
8000
10000
0
1
9000
12500
1
1
10000
15000
1
1
15000
17500
1
1
20000
20000
1
1
25000
25000
DB torch
3
4
L torch
2
2
DB + P
5
torch
1
Pin
2 (green)
4 (white)
3 (brown)
Common/
2 (grey)
10V
1 (yellow)
Cursor
5 (pink)
0
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