Maintenance - Cebora POWER PLASMA 3100 Betriebsanleitung

• 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
Make sure that the electrode T, the diffuser U and the
gas nozzle V are mounted correctly, and that the
nozzle holder W is firmly tightened.
If any of these parts are missing, this will interfere
with smooth operation of the machine and, especial-
ly, jeopardize operator safety
4 CUTTING ERRORS
4.1 INSUFFICIENT PENETRATION
This error may be caused by the following:
• high speed. Always make sure that the arc fully pene-
trates the workpiece and is never held at a forward angle
of more than 10 -15°. This will avoid incorrect consump-
tion of the nozzle and burns to the nozzle holder.
• Excessively thick workpiece (see cutting speed dia-
grams, fig. 5).
Fig. 5
• Grounding clamp not in good electrical contact with the
workpiece.
• Worn nozzle and electrode.
• Cutting current too low.
NOTE: When the arc does not penetrate, the molten
metal scraps obstruct the nozzle.
4.2 THE CUTTING ARC GOES OFF
This error may be caused by:
• worn nozzle, electrode or swirl ring.
• air pressure too high.
• supply voltage too low.
4.3 SHORTER LIFE OF CONSUMER PARTS
This error may be caused by:
• oil or dirt in the arc intake,
• unnecessarily long pilot arc,
• low arc pressure.
5 HELPFUL HINTS
• If the system air contains considerable amounts of moi-
sture and oil, it is best to use a drying filter to avoid
excessive oxidation and wear on consumer parts, dama-
ge to the torch and a reduction in the speed and quality
of the cutting.
• Make sure that the new electrode and nozzle to be
mounted are thoroughly clean and degreased.
• Always use original spare parts to avoid damaging
the torch.

6 MAINTENANCE

Always cut off the power supply to the machine before
any operation, which must always be carried out by qua-
lified personnel.
6.1 GENERATOR MAINTENANCE
In the case of maintenance inside the machine, make
sure that the switch C is in position "O" and that the
power cord is disconnected from the mains.
Even though the machine is equipped with an automatic
condensation drainage device that is tripped each time
the air supply is closed, it is good practice to periodically
make sure that there is no condensation accumulated in
the water trap I (fig.1).
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using com-
pressed air.
6.2 PRECAUTIONS AFTER REPAIRS.
After making repairs, take care to organize the wiring so that
there is secure insulation between the primary and secon-
dary sides of the machine. In particular, make sure that the
casing 50 is mounted (see exploded drawing). Do not allow
the wires to come into contact with moving parts or those
that heat up during operation. Reassemble all clamps as
they were on the original machine, to prevent a connection
from occurring between the primary and secondary circuits
should a wire accidentally break or be disconnected.
Also mount the screws with geared washers as on the ori-
ginal machine.
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