Thermal Arc 180 AC, Руководство пользователя

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Notice NOT 034
THERMAL ARC 180 AC/DC
Rev : 00
Date : 03/12/02
USING
USER’S MANUAL
Page
2 0/36
Y
Up slope time
Press the setting key F8 , adjust the up-slope time with the potentiometer F9 .
When the potentiometer is at the minimum, the up-slope time is 0s, and at the maximum, the up-slope
time is 10s.
The value can be read on the display
F5 (The indicator F18 or F19 goes out).
The pre-adjusted value is 1.0s.
Release the key when your setting is finished.
Z
Down-slope time
Adjust the down-slope time between 0s to 16s with the potentiometer F10 .
[
Post-gas :
Press the setting key F11 , adjust the post-gas time with the potentiometer F9 .
When the potentiometer is at the minimum, the pre-gas time is 3s, and at the maximum, the pre-gas
time is 25s.
The value can be read on the display
F5 (The indicator F18 or F19 goes out).
The pre-adjusted value is 5.0s.
Release the key when your setting is finished.
\
Welding current :
Set the welding current from 3A to maximum value with potentiometer F9 .
The value can be read on the display F5 and indicator F18 illuminates.
12.3. WELDING
Select tungsten electrode
Place on the torch a tungsten electrode thoriated 2% or 4%, or even better, electrode DLZ (Itrium
Lanthane Zirconium) or lanthane, not so radioactive.
Grid electrode’s head at 60° or 90°.
See adviced electrode’s diameter adapted to welding current.
Electrode’s diameter mm 1 1.6 2.0 2.4 3.0 4.0
Welding DC current A <75 50 - 120 90 - 190 130 - 250 170 - 300 250 - 400
H.F ignition
Place the tungsten electrode a few mm away from the workpiece.
Press the trigger on.
After the selected pre-gas time, the arc strikes. The high frequency stops.
The welding current increases during the up-slope time between the value of initial current and the
value of welding current chosen.
The value of the initial current (
I
d
) is pre-adjusted at 50% of the value of welding current chosen but it
is possible to adjust (see chapter 16 ).
At the end of the weld, the arc fades away during the down-slope time and the welding current
reduces from the welding current chosen to the final current.
The final current (
I
f
) is pre-adjusted to 3A but it is possible to adjust it (see chapter 16 ).
The arc goes out. The gas flows according to the post-gas time to ensure the protection of the
tungsten as well as of the weld pool.