20
third current LED L31 where it stays for the time regulated
and displayed by the LED L33.
In this position the pedal control accessory ART. 193 can
be connected.
NOTE: in order for art. 193 to work well set:
1. rst current value (LED L23) at the desired one as pedal
minimum value
2. rst current time at zero (LED L24).
3. slope-up and slope-down time at zero (LED L25 and
L30)
4. third current at the minimum.
LED L5 - 5-stage TIG welding (automatic).
This program differs from the previous one in that the arc
is both started and shut off by pressing and releasing the
torch trigger.
LED L6 - TIG welding with three levels of
current.
To set the three minimum welding currents, proceed as
follows:
Press key T8 until the LED L28 lights, then adjust the
main current value using knob M1.
Press key T7 until the LED L23 lights, then adjust the
initial current value using knob M1.
Press key T8 until the LED L31 lights, then adjust the nal
current value using knob M1.
hen the arc strikes, the current reaches the rst setting
(LED L23lit); By keeping the key pressed, the operator
can maintain this current as long as desired (for example
until the part is heated). Upon releasing the torch trigger,
the current passes from rst
to second
level during the
slope time (LED L25); once the 2
nd
level of welding current
is reached the LED L28 lights.
In order to pass to the 3rd current level the torch trigger is
to be pressed and kept pressed, while the current reaches
the 3rd value selected, in the slope time (LED L30): The
LED L31 will light, and the LED L28 will go off.
To switch off, press the torch trigger.
LED L7 - TIG welding with 4-stage current
levels.
To set the welding currents, proceed as follows:
Press key T8 until the LED L28 lights, then adjust the main
current value.
Press key T7 until the LED L23 lights, then adjust its
value; later on it is possible to adjust also this current time
LED L24.
Press key T8 until LED L29 lights, then adjust its value.
Press key T8 until LED L31 lights, then adjust its value.
Later on it is possible to adjust also this current time LED
L33.
By pressing and releasing the torch trigger, the current
moves to rst level (LED L23) and stays there for the
time previously regulated and displayed by the LED L24
before reaching the welding current in the “slope-up”
time indicated by the LED L25 the reaching of the welding
current is indicated by the start-up of the LED L28.
Should it be necessary to reduce the current during
welding, without shutting off the arc (for instance when
changing the welding material or working position, moving
from horizontal to upright, etc.), press and immediately
release the torch trigger, the current reaches the second
set value, the LED L29 lights and the LED L28 shuts off.
When the torch trigger is released, the current starts to
drop and takes the “slope-down” time indicated by the
LED L30, before reaching the third current LED L31
where it stays for the time regulated and displayed by the
LED L33.
In order to go back to the previous main current, repeat
the same torch trigger pressing and releasing action, the
LED L28 lights while LED L29 shuts off.
To stop welding at any time, simply hold down the torch
trigger for more than 0.7 seconds, then release it; the
current starts to gradually decrease in the time previosly
set (LED L20 lit) until reaching the crater current (LED
L31).
T3 Mode key.
With a long pressure (more than 0.7 sec) of this
key LEDS L8 or L9 are alternatively chosen.
With a short pressure (less than 0.7 sec) of this
key LEDS L10 or L11 are alternatively chosen.
2 LEDs will be always selected: one between LED L8 and
L9 and one between LED L10 and L11.
LED L8 - TIG welding with contact starting
(striking).
LED L9 - TIG welding starting with high
voltage/frequency device.
LED L10 - CONTINUOUS TIG welding.
LED L11 - PULSE TIG welding.
The pulse frequency is adjustable from 0.1 to
2,500 Hz (LED L27), peak current and base current can
be activated via LEDS L28 and L29, respectively, and are
adjustable using the knob M1.
With pulse frequency from 0.1 to 1.1 Hz display D1
alternatively shows peak current (main) and base current;
LEDs L28 and L29 are alterantively on.
With pulse frequency over 1.1 Hz the display D1 shows
the mean current between these two.
Key T4:
B brie pressing it snerg, where available, is
activated and selects LEDS L12, L13, L14, L15
, and L16 (see paragraph 3.7.4).
If, after selecting the parameters, the electrode diameter
is not conrmed, a brief pressure of this ke exits snerg.
If on the contrar, after conrming the parameter, snerg
is to be exited, it is necessary to press it for a long time
(1.5 s).
LED L13: Material.
The types of materials that may be selected are
in relation to the welding process and are:
In TIG AC, aluminium (Al), and magnesium (Mg).
In TIG DC, stainless steel (SS), copper (Cu), iron (Fe) and
titanium (Ti).