Cebora Plasma prof 55 Betriebsanleitung Seite 9

Grade 1 as the second digit means that this
equipment is not suitable for use outdoors in
the rain.The additional letter C means that
the equipment is protected against access
to the live parts of the power circuit by a
tool (diameter 2.5 mm ).
S
. Suitable for use in high-risk environments.
NOTES: 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!
Make sure that the supply voltage matches the one
shown on the front panel of the machine. The voltage may
be changed by turning the disc located below the mains
power switch knob (Art 965) (see fig. 3.).
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
ing 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 max.
1
fig. 3
eff. may be determined by read-
1
.
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 V 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 down-
ward.
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 pro-
tective conductor, the connection must be as direct as
possible and use a wire of at least the same size as the
cutting current return wire, and connected to the work-
piece 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 nozzle f 1.2 supplied with the torch.
Since cutting takes place through contact, the nozzle tends
to become easily clogged as molten metal waste forms
around it. It is therefore a good practice to keep it clean from
any waste that may harden on it.
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.
If cutting does not begin after 2.5 seconds, the pilot arc
shuts off and the torch trigger must thus be pressed again
to restart.
Hold the torch upright while cutting.
Cutting should be done by pulling the torch whenever pos-
sible: pulling is usually easier than pushing (see Fig. 5).
When you have finished cutting and released the trigger,
air will continue to leave the torch for approximately 90
seconds to allow the torch to cool down.
It is best not to turn the machine off until this cool-
down period is complete.
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. 4). This must be done when
making holes in pieces more than 2 mm thick.
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-
eff.
sary to use the starting technique described above (fig.2).
1
Do not keep the pilot arc lit in the air when not needed, to
avoid unnecessary consumption of the electrode, swirl
ring or nozzle.
Turn the machine off when the task is completed.
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