Deca MIGA 320 Manual De Instrucciones página 9

long it must rest for in order to cool down. The time is expressed in % on the
basis of a 10 minute cycle (e.g. 60% means 6 min. work and 4 min. rest).
A / V
Current adjustment field and corresponding arc voltage.
J) Power supply data
U1 Input voltage (permitted tolerance: +/- 10%)
I1 eff Effective absorbed current
I1 max Maximum absorbed current
K) Serial number
L) Weight Fig.4
M) Safety symbols: Refer to Safety Warnings
Technical data for torch and wire feeder Fig.5
Average consumption of wire and welding gas: Fig.10
Assembly and electrical connections
„ Make sure that the power socket to which the machine machine is connected is protected
by suitable safety devices (fuses or automatic switch) and that it is grounded.
„ The device must be connected only to a supply system, with an earthed 'neutral' lead.
„ Make sure that the machine is switched off and disconnected from mains before carrying
out this procedure.
¾ Assembly the detached parts found in the packaging Fig.11.
¾ Check that the electrical supply delivers the voltage and frequency corresponding to
the welding machine and that it is fitted with an automatic switch suited to the maximum
delivered rated current (I2max) Fig. 4,1.
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The requirements set out in the IEC/EN61000-3-12 standard do not apply to this
equipment. If this equipment is connected to low voltage power supply network, either
the installer or the user is responsible for checking that this can be done (consult the
distribution system operator if required).
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In order to comply with the requirements set out in the EN61000-3-11 (Flicker) standard,
it is advisable to connect the welder to the supply network interface points having an
impedance lower than the reference Zmax = Fig.4,4.
¾ Power plug. The effective absorbed current "I1 eff" is indicated on the technical plate of
the welding machine, when it is used at maximum power. Connect the welding machine
to a normalized plug (2P+T per 1Ph) of capacity sufficient to deliver maximum power.
If a 16A plug is connected to the welding machine, follow the instructions in Fig.4,2.
Preparing the welding circuit MIG
¾ Connect the ground lead to the welding machine and to the piece to be welded, as close
as possible to the point to be welded.
**
¾ Connect the torch to the welding machine socket. Select the polarity of the torch**.
For selection follow the instructions in Fig.3 .
Installing the continuous wire
For installation, follow the instructions in Fig. 6.
The material and diameter of the wire must correspond to the wire feeder roller, the
contact tip and the torch liner. If the measurements do not match, there may be problems
with the smooth running of the wire.
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The pressure of the wire pressing knob is important for correct operation. If the wire
slips, there will be problems with the welding; if on the other hand it is too tight, it may
be deformed and will not run smoothly through the torch.
Installing the protective gas cylinder** and pressure reducer**
„ Place the protective gas cylinder in an upright position, far away from the welding area.
Use the welding machine support** or some other fixed part so that there is no risk of
it falling or being damaged.
For installation, follow the instructions in Fig. 7.
Preparing the welding circuit MMA
¾ Connect the ground lead** to the welding machine and to the piece to be welded, as
close as possible to the point to be welded.
¾ Connect the cable with the electrode holder gripper** to the welding machine and mount
the electrode on the gripper. Refer to the electrode manufacturer's instructions concerning
connection and welding current.
Preparing the welding circuit TIG
¾ Connect the ground lead** to the welding machine and to the piece to be welded, as
close as possible to the point to be welded.
¾ Connect the TIG torch** power connector to the negative attachment on the welding
machine and mount the electrode. The torch must be fitted with a gas flow adjustment
valve.
¾ Connect the TIG torch gas pipe to the output of the pressure reducer mounted on an
ARGON protection gas cylinder.
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The recommended sections (mm2) of the welding cable, based on the maximum
delivered rated current (I2 max), are shown in Fig. 4,3.
** (This component may not be included with some models).
Welding process: description of controls and signals
After commissioning, switch on the welding machine, open the protection gas
valve and start the adjustments following the order given in the description of
controls.
Fig. 1
Select the welding process MIG / MMA / TIG LIFT
950068-00 01/06/23
Starting up
[1,1] MIG Synergistic welding
[2],[3] Select the type of material, protection gas and wire diameter TAB.99
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In synergistic mode, all welding parameters are connected to each other to facilitate
the setting of the machine.
[1,2] MIG Manual welding
[3] Adjusting the welding voltage. Is used to freely adjust the welding voltage.
[2] Wire speed adjustment. It allows you to freely adjust only the wire speed.
[4] Inductance adjustment. This varies the penetration and stability of the welding
arc according to the metal and the welding position (flat, vertical, overhead).
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As a rule it should be remembered that the adjustment must be kept within low values
for thin metals, and increases in proportion to the thickness.
[1,3] MMA welding: adjustable parameters
[2] Welding current adjustment.
[5] "ARC FORCE". Increases the intensity of the welding current so that the coated
electrode does not stick onto the workpiece to be welded when the arc voltage
becomes too low.
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To strike the welding arc with the coated electrode, brush it onto the piece to be
welded and as soon as the arc is struck, hold it constantly at a distance equal to the
electrode diameter and at an angle of approximately 20 - 30 degrees in the direction
in which you are welding.
[1,4] Tig welding: adjustable parameters
[2] Main welding current adjustment.
[6] "SLOPE-DOWN". Time at which, once the torch button is released, the welding
current is brought from the main value to the final value (end of welding).
The final value of the welding current is pre-set as 20% of the main current.
L
To strike the welding arc with the TIG torch, make sure that the protection gas valve
is open. With a rapid, sure movement, touch and then withdraw the electrode point
from the piece to be welded.
[7] Welding machine power on warning light
[8] Thermal cutout signal
The warning light switched on means that the thermal protection is running.
If the duty cycle "X" shown on the data plate is exceeded, a thermal cutout stops the
machine before any damage is caused. Wait for operation to be resumed and, if possible,
wait a few minutes more.
If the thermal cutout continues to cut in, the welding machine is being pushed beyond its
normal performance levels.
Switch off the welder and remove the plug from the power socket before carrying out any
maintenance operations.
Ordinary maintenance to be carried out periodically by the operator depending on use.
• Check the gas hose, torch cable and ground cable connections. • Clean the contact
tip and the gas diffuser with an iron brush. Replace if worn. • Clean the outside of the
welder with a damp cloth.
Every time the wire spool is replaced:
• Check the alignment, cleanliness and state of wear of the wire roll Fig.9. • Remove
any metal powder deposited on the wire feeder mechanism. • Clean the wire guide liner
with anhydrous solvent and grease remover and dry with compressed air. • Check the
condition of the warning labels. • Replace any worn parts.
Extraordinary maintenance to be carried out by expert staff or qualified electrical
mechanics, periodically depending on use. (according to the standard EN6974-4).
• Inspect the inside of the welder and remove any dust deposited on the electrical parts
(using compressed air) and the electronic cards (using a very soft brush and appropriate
cleaning products). • Check that the electrical connections are tight and that the insulation
on the wiring is not damaged.
(led on)
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Maintenance