10
When the torch trigger is pressed, the current begins to
increase over the previously set "slope up" time (LED
N
lit),
until it reaches the value set by means of the knob
Q
. The
LED
O
lights and appears on the display
S
.
Should it be necessary to reduce the current during welding,
without shutting of 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 will switch to the second value selected,
the LED
A7
will light and
O
will go off.
To return to the previous main current, press and release the
torch trigger once again. The LED
O
will light, and the LED
A7
will go off. To stop welding at any time, simply hold down
the torch trigger for more than 0.7 seconds, then release.
The current begins to fall to zero within the previously set
"slope down" time interval (LED
A6
lit).
If you press and immediately release the torch trigger during
the "slope down" phase, you will return to "slope up" if it is set
to greater than zero, or to the lesser current value of those
set.
NOTE: The expression "PRESS AND IMMEDIATELY
RELEASE" refers to a maximum time of 0.5 seconds.
LED W - 4-step TIG welding with three levels of
current (automatic trilevel).
To set the three welding currents, proceed as follows:
Press the selector switch
H
until the LED
O
lights, then adjust
the maximum current value using the knob
Q
.
Press the selector switch
H
until the LED
A7
lights, then
adjust the intermediate current value using the knob
Q
.
Press the selector switch
H
until the LED
M
lights, then adjust
the starting current value using the knob
Q
.
The operating logic is the same as previously described for
welding with dual current level LED
V
.
LED A1 - 4-step TIG welding with special
program
To light the arc, press the torch trigger and hold it down; the
current begins to increase at a fixed rate. If the torch trigger
is released, the current immediately rises to the welding
value (LED
O
). To stop welding, press the torch trigger and
hold it down; the current begins to drop at a fixed rate. The
current immediately returns to zero if the trigger is released.
LED A4 - Selector switch for high frequency
ignition and pulsed arc mode, on-off
This push-button selects the ignition type (with high
frequency or by contact) and the continuous or pulsed arc
mode. The selection changes each time the button is
pressed.
The LEDs light next to the various symbols to display your
choice.
LED A2 - Ignition with high frequency or by
contact.
When the LED is off, to start the arc press the torch trigger
and touch the tungsten electrode to the workpiece, then lift it.
This move must be quick and sharp.
When the LED is on, to start the arc, press the torch trigger:
a high voltage/frequency pilot spark will start the arc.
LED A3 - Pulsed arc, on-off
When the LED is on, the pulsed arc mode is activated.
From a pulse frequency of 0.16 to 1.1Hz, the
S
display
alternately shows the peak (main) current and the base
current
The
O
and
F
LEDs light alternately: beyond 1.1 Hz the
S
display shows the mean of the two currents and the
O
and
F
LEDs both remain on.
When the LED is off, the continuous mode is activated.
H – MMA and TIG welding parameters selector
switch
Pressing this button will light the LEDs in sequence:
Warning: only those LEDs which refer to the chosen
welding mode will light;
e.g. in continuous TIG welding the
P
LED, representing the pulse frequency, will not light.
Each LED indicates the parameter, which may be adjusted
via the
Q
knob during the lighting time of the LED.
5 seconds after the last variation, the LED involved will light
off; the main welding current will then be displayed and the
corresponding
O
LED will light.
LED G
Hot-Start LED. May be selected via the button
H
only if
MMA welding is selected (LED
A)
.
This LED lights to indicate that the display
S
displays the
time, expressed in seconds, during which the welding
machine delivers an overcurrent to improve electrode
starting. It may be adjusted using the knob
Q
.
LED I
Arc-force LED. May be selected via the button
H
only if
MMA welding is selected LED
A
.
It is a percentage of the welding current. The display
S
displays its value, and the knob
Q
adjusts it. This
overcurrent essentially aids in the transfer of drops of molten
metal.
LED L
Pre-gas LED. Adjustment 0.05-2.5 seconds. Gas output
time before starting welding.
LED M
Welding start current LED. This is a percentage of the
welding current LED
O
in three levels mode.
LED N
Slope up LED. This is the time in which the current, starting
from the minimum, reaches the set current value. (0-10 sec.)
