Installation - Elettro TIG 157 Betriebsanleitung

3. INSTALLATION

Make sure that the supply voltage matches the voltage indicated
on the specification plate of the welding machine.
The capacity of the overload cut-out switch or fuses installed in
series with the power supply must be equivalent to the absorbed
current I1 of the machine.
WARNING! Extension cords of up to 30m must have a cross-
section of at least 2.5 mm2.
3.1 START-UP
Only skilled personnel
connections must be carried out according to current regulations,
and in full observance of safety laws (regulation CEI 26-10 -
CENELEC HD 427).
3.2 DESCRIPTION OF THE EQUIPMENT (pict. 1 and 2).
C – Procedure and mode selector switch
This push-button selects the welding procedure (MMA or TIG)
and mode (2-step, 4-step and 4-step with dual current level).
The selection changes each time the button is pressed.
The LEDs light next to the various symbols to display your
choice.
A LED – MMA (Manual Metal Arc) welding.
This machine can melt all types of coated electrodes, except for
cellulose.
In this position, only the P knob is enabled to adjust the welding
current.
B LED – 2-step TIG welding (manual)
When the torch trigger is pressed, the current begins to increase
over the previously set "slope up" time (H LED on), until it
reaches the value set by means of the P knob. When the trigger
is released, the current begins to drop over the previously set
"slope down" time (N LED on), until it goes back to zero.
D LED – 4-step TIG welding (automatic)
This program differs from the previous one in that the arc is both
started and extinguished by pressing and releasing the TIG torch
trigger.
E LED – 4-step TIG welding with dual
current level (automatic dual level)
Set the two current levels before starting the arc: First level:
press the I key until the G LED lights, and adjust the main
current using the P knob.
Second level: press the I key until the M LED lights, and adjust
the current using the P knob.
After arc ignition, the current begins to increase over the
previously set "slope up" time (H LED on), until it reaches the
value set by means of the P knob. The G LED lights and is
brought to the display Q.
Should it be necessary to reduce the current during welding,
without extinguishing the arc (for example when changing the
weld material or the working position, moving from horizontal to
standing position, etc.) press and immediately release the torch
trigger, the current will switch to the second value selected, the
M LED will light and G will go off.
To return to the previous main current, press and release the
torch trigger once again, the G LED will light and the M LED 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 (N LED on).
should install the machine.
If you press and immediately release the torch trigger during
the "slope down" phase, you will revert to "slope up" if this is
set to any value greater than zero, or to the lesser current
value of those set.
N.B. the wording "PRESS AND IMMEDIATELY RELEASE"
refers to a maximum time of 0.5 seconds.
V – 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
All
mode. The selection changes each time the button is
pressed.
The LEDs light next to the various symbols to display your
choice.
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.
When the LED is on, the pulsed arc mode is activated.
From a pulse frequency of 0.16 to 1.1Hz, the Q display
alternately shows the peak (main) current and the base
current
The G and F LEDs light alternately: beyond 1.1 Hz the Q
display shows the mean of the two currents and the G and F
LEDs both remain on.
When the LED is off, the continuous mode is activated.
I – 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
L LED, representing the pulse frequency, will not light.
Each LED indicates the parameter, which may be adjusted
via the P 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 G LED will light.
Slope up. This is the time during which the current, starting
from the minimum, reaches the set current value (0-10 sec.)
Main welding current.
Base current in pulsed arc mode.
Pulse frequency (0.16 to 250 Hz).
The base and peak times are the same.
8
T LED – Ignition with high frequency or
U LED – Pulsed arc, on-off
H LED
G LED
F LED
L LED