Recommendations For Use - Deca i-TIG 320 LAB Manual De Instrucciones

Starting up
„ Connections to the mains must be made by expert or qualified personnel.
„ Make sure that the welding machine is switched off and the plug is not in the power
socket before carrying out this procedure.
„ Make sure that the power socket that the welding machine is plugged into is protected
by safety devices (fuses or automatic switch) and grounded.
„ The device must be connected only to a supply system, with an earthed 'neutral' lead.
Assembly and electrical connections
¾ Assembly the detached parts found in the packaging (Fig.5).
¾ Check that the electrical supply delivers the voltage and frequency corresponding to the
welding machine and that it is fitted with a delayed fuse suited to the maximum delivered
rated current (I2max) Fig. 3,1.
L
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).
L
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.3,4.
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. Fig 3,2. If a 16A plug is connected to the welding
machine, make sure that the effective "I1 eff" current required for the desired use is
adequate to the 16A plug capacity and the slow blow fuse of the system. Fig 3,2.
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.
L
In welding machines that deliver direct current, most of the electrodes are connected
to the positive attachment, and only some electrodes (such as Rutile coated ones)
are connected to the negative attachment.
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.
¾ Connect the torch control connector into the connector "B" on the front panel.
¾ Connect the TIG torch gas hose to the gas fitting "P" on the front panel.
L
The recommended sections (mm2) of the welding cable, based on the maximum
delivered rated current (I2 max), are shown in Fig. 3,3.
„ 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. 6.
L
Non-refillable cylinders are equipped with a pin valve that opens automatically when
the pressure reducer is screwed onto the cylinder.
** (This component may not be included with some models).
Welding process: description of controls and signals
Once you have put the welding machine into operation, switch it on and carry out the
required adjustments.
¾ Set the welding mode by pressing buttons "E". The options selected are signalled by
the lit LEDs next to the different symbols.
¾ Select each individual welding parameter by pressing buttons "F". The welding parameter
to be modified is highlighted by a lit LED next to the symbol and its value is shown on
the display. Turn dial "G" to change the parameter value.
L
Table 1 shows the unit of measurement and the field to adjust the welding parameters.
E1) MMA, TIG LIFT, TIG HF selector
Press it to select the desired welding process:
¾ MMA: welding with coated electrode.
¾ TIG LIFT: TIG welding with LIFT ARC striking.
¾ TIG HF: TIG welding with high frequency arc striking
L
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.
L
To strike the welding arc with the TIG torch in TIG LIFT mode, make sure that the
protection gas valve is open.Keep the electrode in contact with the workpiece, press
the torch trigger and lift the tip of the electrode from the workpiece.
L
To strike the welding arc in TIG HF mode, make sure that the protection gas valve is
open. Stay with the electrode tip at a distance of 5mm from the workpiece and press the
950677-00 07/07/18
torch trigger: the arc will strike without need for the electrode to touch the workpiece.
E2) TIG 2T / TIG 4T selector
¾ 2T (manual): press and keep the torch trigger pressed to weld, the weld will stop as
soon as the button is released
¾ 4T (automatic): press and release the torch trigger to start welding, the weld will last
until the trigger is pressed and released once again.
F) MMA welding: adjustable parameters
¾ "I (Amp)" "F3" Welding current adjustment.
¾ "ARC FORCE" (led slope down) "F5" 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.
¾ "HOT START" (led slope up) "F2" Increase the intensity of the welding current to
facilitate starting coated electrodes.
F) TIG welding: adjustable parameters
¾ "PREGAS" "F1" (TIG HF) Pre-gas time adjustment.
¾ "SLOPE-UP" "F2" Adjustment of time at which the welding current is brought from the
initial value (arc start) to the main value "I (Amp)". The initial value of the welding current
is pre-set as 25% of the main current value.
¾ "I (Amp)" "F3": Main welding current adjustment.
¾ "SLOPE-DOWN" "F5" 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.
¾ "POST-GAS" "F6" POST-GAS time adjustment.
¾ "T (SPOT)" "F3 + F4" In the "SPOT" mode it varies the duration of the welding point.
¾ "PULSE (Hz)" "F4" In the "TIG PULSE" mode, it varies the pulse frequency. The
welding time at the main current is the same as the welding time at the base current.
L) Remote (Foot pedal) control connection pilot lamp
It illuminates when an optional remote (foot pedal) control is connected at the machine.
M) 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.
Machine reset
With the machine on, press the "F" button for 3 seconds: the factory-set values of all the
parameters will be reset .
L
Do not connect remote (foot pedal) control.

Recommendations for use

„ Only use an extension lead when absolutely necessary and providing it has an equal or
larger section to the power cable and is fitted with a grounding conductor.
„ Do not block the welder air intakes. Do not store the welder in containers or on shelving
that does not guarantee suitable ventilation.
„ Do not use the welder in any environment in the presence of gas, vapours, conductive
powders (e.g. iron shavings), brackish air, caustic fumes or other agents that could
damage the metal parts and electrical insulation.
L
The electric parts of the welder have been treated with protective resins. When used for
the first time, smoke may be noticed; this is caused by the resin drying out completely.
The smoke should only last for a few minutes.
Switch off the welder and remove the plug from the power socket before carrying out any
maintenance operations.
Extraordinary maintenance to be carried out by expert staff or qualified electrical
mechanics periodically depending on use. (Apply the rule EN 60974-4).
• 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.
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Autogoods "130"
Maintenance