Deca I-PAC 340 Manuel D'instructions page 7

This manual refers to a range of machines that differ in some of their characteristics.
Identify your model in Fig. 1.
Main parts Fig. 1
A) Mains input lead
B) ON/OFF switch
C) Machine connected led
D) Adjustment of the cut-off current/ air pressure test. (Mod.1,2)
F) Low air pressure warning light (Mod.1,2)
F) Thermal protector intervention light
Technical data
A rating plate is fixed or printed on each machine. Fig. 2 shows an example of this plate.
A) Manufacturer name and address
B) European reference standard for the construction and safety of welding equipment
C) Symbol of the machine internal structure
D) Symbol of the involved welding/cutting process
E) Symbol of the output current: DC (Direct Current)
F) Input power symbol:
1˜ alternate single phase voltage, frequency: F1: from electrical power supply;
F2: from motor generator
G) Degree of protection against penetration of solid bodies and liquids
H) Symbol indicating that the machine can operate in environments with increased
hazard of electric shock
I) Welding circuit performance
U0V Minimum and maximum open circuit voltage (open welding circuit).
I2, U2 Current and corresponding normalised voltage delivered by the machine.
X Duty cycle. Indicate how long the welding machine can work for and how
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. 3
M) Safety symbols: Refer to Safety Warnings
- Technical data for PAC torch** Fig.2,1
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.
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. 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.
If a 16A plug is connected to the welding machine, follow the instructions in Fig. 3,2.
Preparing the plasma cutting circuit
¾ Connect the ground lead to the machine and to the workpiece as close as possible to
the area to be cut and in an area free from rust, paint or dirt.
¾ (Mod.1,2) Connect the air flow regulator of the machine to a suitable source of
compressed air capable to deliver at least 120L/min at a pressure of 5,0 BAR (72
PSI) minimum.
L
The recommended sections (mm2) of the welding cable, based on the maximum
delivered rated current (I2 max), are shown in Fig. 3,3.
Plasma cutting: description of controls and signals
Once you have carried out the "Starting Up" procedure and connected the machine at the
mains, switch it on and carry out the required adjustments.
L
(Mod.3) As the machine is switched on the air will flow from the torch for about 15
sec.(air purge); once the time has elapsed you can start cutting.
Output current adjustment
¾ (Mod.1,2) Turn the potentiometer and set it to "Air Test". Press the torch switch to let
air out. Check for correct pressure. Check for correct air pressure with the pressure
gauge. An internal pressure switch will prevent cutting operations if the pressure is too
low, and the light F will illuminate.
¾ Set the output current according to the thickness and type of material to be cut.
L
Start cutting, and operate at the highest cutting speed which allows the molten metal
to be blown through the cut and not being projected backwards against the torch or
950004-01 24/05/05
Starting up
Fig. 5
the operator.
L
Always start the cut from an edge, if this is not possible it is advisable to drill a hole
and start cutting from it.
L
As the torch trigger is released, the air flow will last about 30sec, to allow the torch
to cool down adequately: never switch off the machine before the air flow has
stopped
L
As a guide, select the cutting current according to metal thickness as shown in Fig.
4. Values shown are given for mild steel.
Mains voltage pilot lamp Fig. 1
LED "C" flashes when a power network failure is detected.
LED "C" permanently illuminated: indicates that the machine is connected to mains and
switched "ON".
Low air pressure warning light Fig. 1
)Mod.1,2) LED "F" flashes.
When illuminated indicates a low air pressure. Turn the potentiometer and set it to "Air
Test". Press the torch switch to let air out. Check for correct pressure. Check for correct
air pressure with the pressure gauge. Do not exceed the values given on the front panel.
Thermal protection intervention light Fig. 1
LED "F" permanently illuminated. 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 machine and remove the plug from the power socket before carrying out any
maintenance operations.
Torch Routine Maintenance Fig. 7
L
Before disassembling the torch, wait until it has cooled off.
Torch maintenance is essential to keep machine functioning properly.
Maintenance should be performed on a regular basis depending on machine use and
every time a cutting defect is detected.
2 Nozzle holder
L
Screw and unscrew the nozzle holder manually.
Clean the nozzle holder well and replace it if damaged (burnt, deformed, cracked).
3 Nozzle
Replace the nozzle if the passage hole for the plasma arc has stretched or deformed.
If the nozzle surfaces are highly oxidised, clean them with very fine sandpaper.
4 Air distribution ring
Check that the air passages are not obstructed.
Clean the ring well and replace it if damaged (burnt, deformed, cracked).
5 Electrode
Replace the electrode when the crater that is formed at the tip is around 1.5 mm deep.
6 Torch body
The torch body does not require any routine maintenance.
Clean all the parts of the torch well. Do not use the machine if its parts are damaged (burnt,
deformed, cracked) and take the torch to an authorised service centre for repair.
Mechanical primer torch
When replacing the electrode, Make sure that the ignition mechanism moves freely.
If the movement results difficult, apply some lubricant and move the device several times
to verify it moves freely.
IMPORTANT: remove the exceeding lubricant before reassembling the torch.
USE pure Vaseline without solvents or Paraffin oil.
ATTENTION: lubricants with solvents such as Toluene, Xylene, Benzene or with Silicone,
Lithium and Teflon DAMAGE THE TORCH.
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 machine 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.
Manufacturer's Warranty Pag. 52.
6
Maintenance