Cebora POWER PLASMA 3000 Manual De Instrucciones página 8

regulations (see CEI 26-10 CENELEC HD427).
Connect the air supply to the fitting B.
• If the system air contains a considerable amount of moi-
sture and oil, it is best to use a drying filter to avoid
excessive oxidation and wear of the consumer parts,
damaging the torch and reducing the cutting speed and
quality.
If the air supply comes from a pressure regulator of a
compressor or centralized system, the regulator must be
set to an output pressure of no more than 8 bar (0.8 Mpa).
If the air supply comes from a compressed air cylinder,
the cylinder must be equipped with a pressure regulator.
Never connect a compressed air cylinder directly to
the regulator on the machine! The pressure could
exceed the capacity of the regulator, which might
explode!
Connect the power cord A : the yellow-green cable wire
must be connected to an efficient grounding socket on
the system. The remaining wires must be connected to
the power supply line by means of a switch placed as
close as possible to the cutting area, to allow it to be shut
off quickly in case of emergency.
The capacity of the cut-out switch or fuses installed in
series with the switch must be equal to the current I
absorbed by the machine.
The absorbed current I
the technical specifications shown on the machine under
the available supply voltage U
Any extension cords must be sized appropriately for the
absorbed current I
.
1
3 USE
Read the standards CEI 26/9 - CENELEC HD 407 and CEI
26.11 - CENELEC HD 433 carefully before using the
equipment, and make sure the cable insulation is fully
intact. Make sure the trigger has not been pressed.
Turn the machine on using the switch C. The warning
lamp D will light to indicate that the machine is on.
Press the torch trigger briefly to open the flow of com-
pressed air. Since the arc is not lit, air leaves the torch for
only 5 sec. Now adjust the pressure, shown on the pres-
sure gauge F, to 3.5 bar (0.35 MPA) using the knob E on
the regulator, then lock the knob by pressing it
downward.
Connect the grounding clamp to the workpiece.
The cutting circuit must not be deliberately placed in
direct or indirect contact with the protective wire except
in the workpiece.
If the workpiece is deliberately grounded using the protecti-
ve conductor, the connection must be as direct as possible
and use a wire of at least the same size as the cutting cur-
rent return wire, and connected to the workpiece at the
same point as the return wire using the return wire clamp or
a second grounding clamp placed in the immediate vicinity.
Every precaution must be taken to avoid stray currents. Use
the knob M to select the cutting current.
Make sure that the grounding clamp and workpiece have
a good electrical contact, especially with painted, oxidi-
zed or insulated sheet metal.
Do not connect the grounding clamp to the part of the
material that is to be removed.
Press the torch trigger to strike the pilot arc.
8
may be determined by reading
1
.
1
fig.2/A
If cutting does not begin within 2 seconds, the pilot arc
goes out; press the trigger again to re-strike it.
Begin cutting as shown in fig. 2a, avoid starting as shown
in fig. 2b
Hold the torch upright while cutting.
When you have finished cutting and released the trigger,
air will continue to leave the torch for approximately 40
seconds to allow the torch to cool down.
It is best not to turn the machine off until this cool-
down period is complete.
1
To cut perforated or grid metal, activate the "Pilot self
restart" function using the push-button P (LED O lit).
When you have finished cutting, holding this push-button
down will cause the pilot arc to restart automatically.
Use this function only if necessary to avoid unneces-
sary wear on the electrode and nozzle.
Should you need to make holes or begin cutting from the
center of the workpiece, you must hold the torch at an
angle and slowly straighten it so that the nozzle does not
spray molten metal (see fig. 3). This must be done when
making holes in pieces more than 3 mm thick.
Turn the machine off when the task is completed.
fig.3
3.1 REPLACING CONSUMER PARTS
Always shut off the machine before replacing consu-
mer parts.
• The electrode must be replaced when it has a crater in
the center approximately 1 mm deep.
• The gas nozzle must be replaced when the hole is no
longer smooth and the cutting capacity is diminished.
• The diffuser must be replaced when some areas are
blackened. Due to its small size, it is very important to
position it correctly during assembly (see fig. 4).
• The nozzle holder must be replaced when the insulating
part is deteriorated
fig. 2/B
fig. 4