Cebora PLASMA SOUND PC 130/T Betriebsanleitung Seite 21

on the thickness and quantity of material to be removed.
With the welding torch in slanted position (fi g.4) proceed
towards the melted metal so that the gas coming out
of the welding torch keeps it away. The welding torch
slanted position versus the workpiece depends on the
penetration you want to obtain.
As melted dross tends to stick to the nozzle holder and
nozzle protection during this procedure, it is recom-
mended to frequently clean them so as to avoid prob-
lems (double arc) which may destroy the nozzle in few
seconds. Given the strong (infrared and ultraviolet) radi-
ation emission during this operation, it is recommended
that the operator and people nearby wear an adequate
protection.
Fig. 6
4.4 SPOT MARKING (SPOT MARK OPERATING
MODE)
SPOT
MARK
MILD STEEL
Air 5.5 bar
Select this operating mode to perform spot marking oper-
ations, also known as punch mark.
For the material settings, gas and cutting current, refer to
paragraph 4.1 as well as for the adjustment of the working
pressure. For the duration of the spot marking, select the
correspondent task and, by pressing the H knob, adjust
the duration time.
Spot marking is a particular type of marking where the
track consists of a point, unlike a line drawing or any of
its normal markings.
After setting the parameters that match with the operat-
ing mode you need, you can manage and run the marking
spot both with the hand torch and whith the profi le ma-
chine torch directly from the CNC, while maintaining the
20 A
20 ms
same cutting parameters and the same consumables.
In case of profi le machine torch use, therefore with the
already assembled CNC interface, by means of a digi-
tal signal in the relevant pins (see electrical diagram) the
operating mode is changed from cutting to spot marking
(CUT/SPOT MARK) shown on the display
5. REPLACING THE CONSUMABLES
IMPORTANT: Switch the power source off before re-
placing any consumables.
Making reference to Fig. 8, parts subject to wear are
electrode A, diffuser B, nozzle C and nozzle protection
E. These should be replaced after unscrewing the nozzle
holder D. Sometimes it may be necessary to clean the
inner part of the swirl ring B. In that event, use the special
tool as shown in Figure 8A.
Electrode A must be replaced when it shows an approx
1.2 mm deep crater at the center.
CAUTION: do not use sudden force to unscrew the
electrode; work gradually to release the thread. The new
electrode must be screwed into the seat and fastened in
place without tightening fully.
The nozzle C must be replaced when the central hole
is damaged or wider than that of a new part. Delays in
replacing the electrode or nozzle will cause the parts to
overheat, and jeopardize the life-span of the swirl ring B.
Make sure that the gas nozzle holder D is fi rmly tightened
after replacement.
A
B
C
D
E
Fig.8
WARNING: screw the nozzle holder D onto the welding
torch body only when electrode A, swirl ring B, nozzle C
and nozzle protection E are assembled.
If any of these parts are missing, this will interfere
with smooth operation of the machine and, especial-
ly, jeopardize operator safety.
N.
B
Fig.8/A
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