Cebora SOUND PC 9060/T Manual De Instrucciones página 9

Class 3 as the second digit means that
this machine is suitable for working out
doors in the rain.
S
.................... Suitable for working in hazardous envi-
ronments.
NOTE: The machine has also been designed for use in
environments with a pollution rating of 3. (See IEC 664).
2.5 START-UP
The machine must be installed by qualified personnel.
All connections must be made in compliance with
current safety standards and full observance of safe-
ty regulations (see CEI 26-10 CENELEC HD427).
Connect the air supply to the fitting B.
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. Now adjust the pressure, shown on the pres-
sure gauge F, to 4.7 bar (0.47 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 protec-
tive conductor, the connection must be as direct as possi-
ble and use a wire of at least the same size as the cutting
current 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 cur-
rents. Use the knob M to select the cutting current.
Use the nozzle ø1 up to 50 A, the nozzle ø 1.2 from 45
may be determined by reading
1
.
1
to 70 A, and the nozzle ø1.3 from 70 to 90 A.
CAUTION!
• The nozzle must never touch the workpiece with
currents greater than 45/50 A; you must therefore use
the two-pronged spacer Art. 1404.
• The nozzle ø 1.3 mm may be used in place of the ø 1.2
mm even for currents below 70 A, if a slightly lower cut-
ting quality is acceptable.
NOTE: The cutting quality is considerably improved if the
nozzle is held approximately 3 mm from the workpiece.
For practical reasons, it is at times preferable to cut with
the nozzle in contact with the workpiece.
This working technique must not be used at currents
greater than approximately 45/50 A, because it leads
to rapid (at times instantaneous) destruction of the
nozzle hole, causing poor quality cutting.
The red warning lamp (O) lights to indicate that the
spacer (art. 1404) MUST be used for cutting.
Make sure that the grounding clamp and workpiece have
a good electrical contact, especially with painted, oxi-
dized 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.
If cutting does not begin within 2 seconds, the pilot arc
goes out; press the trigger again to re-strike it.
Hold the torch upright while cutting.
When you have finished cutting and released the trigger,
air will continue to leave the torch for approximately 100
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
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. 2). This must be done when
making holes in pieces more than 3 mm thick.
During automatic operation (see fig. 3), hold the nozzle
6/7 mm away from the workpiece. After the hole has been
made, move it to a distance of approximately 3/4 mm. Do
not make holes in pieces more than half the maximum
thickness allowed by the set current. For thicker materi-
als, you must drill the workpiece before cutting.
When making circular cuts, we recommend using the
special compass available upon request. It is important to
remember that use of the compass may make it neces-
sary to use the starting technique described above (fig.2).
Do not keep the pilot arc lit in the air when not needed, to
avoid unnecessary consumption of the electrode, swirl
ring or nozzle.
fig. 3
fig. 2
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