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The most important data regarding use and performance of the welding machine are
summarised on the rating plate and have the following meaning:
Protection rating of the covering.
Symbol for power supply line:
1~: single phase alternating voltage;
3~: three phase alternating voltage.
Symbol S: indicates that welding operations may be carried out in environments
with heightened risk of electric shock (e.g. very close to large metallic volumes).
Symbol for welding procedure provided.
Symbol for internal structure of the welding machine.
EUROPEAN standard of reference, for safety and construction of arc welding
machines.
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technical assistance, requesting spare parts, discovering product origin).
Performance of the welding circuit:
- U
: maximum no-load voltage (open welding circuit).
- I
/U
: current and corresponding normalised voltage that the welding machine
can supply during welding.
- X
: Duty cycle: indicates the time for which the welding machine can supply
the corresponding current (same column). It is expressed as %, based on a 10
minutes cycle (e.g. 60% = 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 standby
until its temperature returns within the allowed limits).
- A/V-A/V
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maximum) at the corresponding arc voltage.
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- U
: Alternating voltage and power supply frequency of welding machine (allowed
limit ±10%).
- I
PD[
: Maximum current absorbed by the line.
- I
HII
: Effective current supplied.
: Size of delayed action fuses to be used to protect the power line.
Symbols referring to safety regulations, whose meaning is given in chapter 1
“General safety considerations for arc welding”.
Note: The data plate shown above is an example to give the meaning of the symbols
and numbers; the exact values of technical data for the welding machine in your
possession must be checked directly on the data plate of the welding machine itself.
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The welding machine basically consists of a combination of power and control
modules realised on circuit boards optimised to achieve maximum reliability and
reduced maintenance.
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Single-phase power line
input
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if foreseen) and levelling capacitors.
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supply voltage to high frequency AC voltage and regulates the output according to
the welding current/voltage required.
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the primary winding is powered by the voltage
converted by block 2; this adapts the voltage and current to the frequency required
by the arc welding procedure while providing galvanised insulation of the welding
circuit from the power supply line.
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switches the voltage / AC
supplied by the secondary winding into extremely low wave DC voltage.
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instantly checks the welding current value
and compares it to the value set by the operator; it also modulates the command
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sets the welding cycles and monitors
the safety systems.
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to set
and view operating modes and parameters.
Welding
machine
cooling fan
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to set operating modes and parameters.
- Primary function: MMA or TIG selection
- Secondary function (press and hold in MMA mode): Hot Start, Arc Force and,
where applicable, VRD device enabling / disabling settings.
Rapid press-and-release of the button allows users to select the parameter to be
controlled by the encoder (5) with relative value indicated on the display (3).
Press and hold the button to exit this settings procedure.
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Initial overcurrent regulator setting ((from 0-100%) with the percentage increase
compared to the preset welding current value indicated on the display. This
setting facilitates the striking of the electric arc.
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Dynamic overcurrent regulator setting ((from 0-100%) with percentage increase
compared to the preset welding current value indicated on the display. This
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piece.
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No-load voltage reduction device (ON-OFF switch) with device enabled
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indications on the display (3). This device
increases safety levels for operators when the welding machine is ON but not in
the welding position.
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For models where programmed, 2 different settings of the maximum
available welding current can be selected.
CL.1: Setting with reduction of the maximum welding current (less power
available).
CL.2: Setting without reduction of the maximum welding current (more power
available).
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when switching on the welding machine (with closure of the main switch).
CL.1 is set initially, and it is also possible to carry out a general reset of the
parameters (res ON/OFF).
The procedure can be exited as described previously.
Operating mode and parameter settings
LEDs
:
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MMA mode enabled
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TIG mode enabled
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OFF by default, when ON this indicates that the welding machine is
blocked, (the machine is ON without generating current) after one of the following
protection devices has been triggered:
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the temperature inside the welding machine is too high. The
machine resets its standard default settings automatically.
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alarm on the
display.
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the voltage is +/- 15% higher
or lower than the rated value.
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alarm on the display.
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Exceeding the above indicated overcurrent threshold can cause
serious damage to the device.
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The electrode is stuck to the material to be welded; it
can be removed manually.
The machine resets its standard default settings automatically.
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operations are in progress.
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to connect the welding cable.
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to connect the welding cable.
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O/OFF – I/ON (luminous).
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All welding machines described in this manual must be lifted using the built-in handle.
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Before installing the welding machine, check there are no obstacles blocking the
cooling air input and output zones (fan powered forced ventilation); also check that
no conductive dust, corrosive fumes, humidity etc. can be sucked into the machine.
Make sure there is at least 250mm clearance space surrounding the welding machine.
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- Before making any electrical connections, check that the data on the welding
machine rating plate corresponds to the power supply current and frequency
available in the installation zone.
- The welding machine must only be connected to a power supply system with a
grounded neutral conductor.
- Use differential switches to ensure protection against indirect contact as follows:
-
Type
A
(
) for single-phase machines;
- In order to meet all EN 61000-3-11 (Flicker) Standard requirements, it is
recommended to connect the welding machine to the power supply interface
sockets that guarantee impedance of less than Zmax = 0.25 ohm (single phase).
- The welding machine does not meet IEC/EN 61000-3-12 Standard requirements
(models without PFC).
If it is connected to a public power grid, the installer or user is responsible for
checking that the welding machine can be safely connected (if in doubt, contact the
relative electricity board).
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- The single phase welding machines with absorbed current lower or equal to 16A are
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- The single phase welding machines with absorbed current higher than 16A are
supplied with a power cable to be connected to a suitable normalised plug (2P+T).
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be connected to the power supply protective ground wire (yellow-green).
- Table 1
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shows the recommended
delayed fuse sizes, in amps, for the main
supply, which have been chosen according to the maximum rated current output
from the welding machine, and to the nominal power supply voltage
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Table 1
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lists the recommended welding cable values (in mm
2
) according to the
max rated current output of the welding machine.
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- Insert the current power cable into the quick connect terminal (-). Connect the torch
gas pipe to the cylinder.
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- To be connected to the piece being welded or to the metal workbench on which it is
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This cable is to be connected to the terminal with the (+) symbol.
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- Screw the pressure reducing valve to the gas bottle valve divided, where necessary,
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- Connect the gas delivery pipe to the reducer valve and tighten the supplied clamp.
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valve.
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seen in the table
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; this pressure reducer ring nut can also be used to tweak
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