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2. INTRODUCTION AND GENERAL
This welding machine is a power source for arc welding, made
specically for direct current (DC) .
The
i.e. welding machine
gives excellent results when welding both with coated electrodes
(rutile, acid, basic).
Regulation with the
line (primary) means there is a drastic reduction in the volume of
both the transformer and the levelling reactance. This allows the
construction of a welding machine with extremely reduced weight
and volume, enhancing its advantages of easy handling and
transportation.
OPTIONAL ACCESSORIES:
-
3. TECHNICAL DA
DA
The most important data regarding use and performance of the
welding have
following meaning:
Fig. A
1- Protection rating of the covering.
2- Symbol for power supply line:
1~: single phase alternating voltage;
3- Symbol S: indicates
in environments
close to large metallic volumes).
4- Symbol for welding procedure provided.
5- Symbol for internal structure of the welding machine.
6- EUROPEAN
of arc welding machines.
7- Manufacturer’s
(indispensable
discovering product origin).
8- Performance of the welding circuit:
- U
0
: maximum no-load voltage.
- I
2
/U
2
:
welding machine can supply during welding
- X : Duty cycle: indicates the time for which the welding
machine can
It is expressed
6 minutes working, 4 minutes pause, and so on).
If the usage factors (on the plate, referring to a 40°C
environment) are exceeded, the thermal safeguard will
trigger (the welding machine will remain in stand-by until its
temperature returns within the allowed limits).
- A/V shows the range of adjustment for the welding
current (minimum-maximum)
9- T
- U
1
: Alternating voltage and
machine (allowed limit ±10%):
- I
1 max
: Maximum current absorbed by the line.
- I
1eff
: effective current supplied.
10-
:
power line.
1Symbols referring to
in chapter 1 “General safety considerations for arc welding”.
Note:
of
the welding machine in
the data plate of the welding machine itself.
OTHER TECHNICAL DA
- WELDINGMACHINE:
- see table 1 (T
- %USE A (if present on the top cover of the welding
machine)
USE A
number
(ELECTRODES 10 MIN) at 20°C with a
each datum given
(%USE) which is the value in comparison with the maximum
number of weldable electrodes.
- ELECTRODE HOLDER CLAMP: see table 2 (T
The weight of the welding machine is given in the table 1 (T
4.DESCRIPTIONOFTHEWELDINGMACHINE
The unit is comprised
on a specially printed circuit designed to maximise reliability and
reduce maintainance.
Fig. B
1- Power
2- Transistors and drivers switching bridge (IGBT).
It
voltage permits according current/
voltage of the weld to be done.
3- High frequency transformer: the primary windings are fed by
the voltage
voltage and current to the values required by the arc welding
procedure
the mains.
4- Secondary rectier bridge with inductance: this changes the
alternate voltage/current supplied by the secondary windings
into continuous current/voltage at a low wave-length.
5- Electronic and regulation board: this instantly checks the
value welding current against the user,
it commands of drivers,
Regulation. Determines the dynamic response of the current
while the electrode melts (instantaneous short circuits), and
supervises the safety systems.
The ”DUAL VOL AUTOMA model has a device that
automatically
AC) and sets up the machine for correct operation.
The user will be able to understand whether the machine power
supply is (Fig C (3)) .
- GREEN LED shows
power supply
- ORANGE LED shows
power supply
During operation at 1
sizeable voltage surges will cause the machine to switch to
230V AC operation for safety
In such circumstances, to resume welding, the machine must
be switched off and on again.
Waituntil
switching on again.
CONTROL, REGULA
WELDINGMACHINE
Front Panel
Fig. C
1- Positive quick plug (+) to connect welding cable.
2- YELLOWLED: normally off, when ON it means that
current cannot ow due to one of the following faults:
- Thermal protection: inside the machine the temperature is
excessive. The machine is ON but does not deliver current
until a
re-start is automatic.
- Mains over/undervoltage protection: the machine is
blocked: the
rating plate W
limit, as above, will cause serious damage to the device.
- ANTI STICK protection: automatically shuts down the
welding if sticks material
welded so
the electrode holder clamp.
3- GREEN LED: Connection to the mains, machine ready to work.
4- Potentiometer
in
(The “DUAL VOL AUTOMA model has a double
graduated
5- Negative quick plug (-) to connect welding cable.
Back panel
Fig. D
1- Mains cable with E.E.C. 2p plug + (
).
(For the
plug).
2- General luminous switch O/OFF - I/ON.
