Cebora PLASMA SOUND PC 50/M Manual De Instrucciones página 22

Do not keep the pilot arc lit unnecessarily in the air: this
will increase consumption of the electrode, diffuser and
nozzle.
Connect the ground cable clamp to the workpiece and
make sure that the clamp and the workpiece are in good
electrical contact, especially with painted sheet metal,
oxidized, or insulated metal. Do not connect the clamp to
the piece of material to be removed.
Hold the torch upright while cutting.
Once cutting is completed and after having released the
trigger, air will keep coming out of the torch to allow it to
cool.
Do not turn off the unit before this time has elapsed.
Adjust the cutting current using knob H from 20 to 50A
depending on the work being done.
For CP70C MAR torch
Cutting can be carried out by resting the nozzle guard
directly onto the workpiece.
In case you need to make holes or start the cut from the
centre of the workpiece (see fig. 4), hold the torch at a
30° angle and keep the guard a few millimetres from the
workpiece, strike it and slowly straighten it until it is per-
pendicular, so that the molten metal does not splash onto
the nozzle guard. Once it has been pierced, proceed with
the cut. This must be done when making holes in pieces
thicker than 3 mm.
If making circular cuts, we recommend using the special
calipers supplied upon request. It is important to remem-
ber that the calipers may make it necessary to employ
the above-mentioned starting technique.
If cutting in hard to reach areas, long consumables can
be used.
For CP70C DAR torch
Fig.4
Closely follow the instructions contained in the cutting
chart regarding the pierce height, the working height and
the maximum cutting thickness depending on the current
(see fig. 5). Also refer to the instruction manual of the op-
tional kit (art. 441) for the pantograph connection.
22
Fig.5
4.2 GRID CUTTING (SELF-RESTART OPERATING
MODE)
To cut drilled plates or grids, select this operating mode
by pressing button S. LED R (green) on indicates that this
function is enabled.
For the material, gas and cutting current settings, as well
as for the adjustment of the working pressure refer to par-
agraph 4.1. When cutting is completed, keep the button
pressed and the pilot arc will restart automatically.
Use this function only if required, to avoid excessive wear
of the electrode and nozzle.
4.3 GOUGING ("GOUGE" OPERATING MODE)
To run gouging operations, which is only available for the
hand torch, use the dedicated consumables.
This operation makes it possible to remove defective
welds, separate welded pieces, prepare edges, etc.
The value of the current to be used depends on the thick-
ness and quantity of material to be removed. It may help
to set the supply pressure to 4.5 - 5.0 bar.
With the welding torch in slanted position (fig. 6) proceed
towards the melted metal so that the gas coming out of
the welding torch keeps it away.
Vary the slant of the torch with respect to the workpiece
and/or the advance speed to obtain different levels of
penetration. As melted dross tends to stick to the nozzle
holder and nozzle guard during this procedure, it is best
to frequently clean them so as to avoid double arc events
which may destroy the nozzle in a matter of seconds.
Given the strong (infra-red and ultraviolet) radiation emis-
sion during this operation, it is recommended that the op-
erator and people in the vicinity wear adequate PPE.
Fig. 6
5 REPLACING CONSUMABLES
IMPORTANT: Switch the power source off before re-
placing any consumables Making reference to Fig. 7 for
CP70C torch, parts subject to wear are electrode A, diffus-
er B, nozzle C and nozzle protection E. These should be
replaced after unscrewing the nozzle holder D. Electrode
A must be replaced when it shows an approx 1.2 mm deep
crater at the center.