Generator Maintenance - Cebora PLASMA PROF 55 Manual De Instrucciones

fig. 4
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°(see fig.5). This will avoid incorrect
consumption of the nozzle and burns to the nozzle holder.
• Excessively thick workpiece (see cutting speed dia-
gram, fig. 6)
• Grounding clamp not in good electrical contact with the
workpiece.
• Worn nozzle and electrode.
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 SLANTED CUT
If the cut appears slanted, turn the machine off and
replace the nozzle.
1/8
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
2
10
OPEN
15° max.
1/4 3/8
FE
AL
INOX
4 6 8
4.4 EXCESSIVE WEAR ON CONSUMABLEE PARTS
This problem may be caused by:
a) air pressure too low compared to the recommended
level.
b) excessive burns on the end of the nozzle holder.
5 HELPFUL HINTS
• If the system air contains considerable amounts of
moisture and oil, it is best to use a drying filter to avoid
excessive oxidation and wear on consumer parts, dam-
fig. 5
age to the torch and a reduction in the speed and quality
of the cutting.
• The impurities in the air encourage oxidation of the elec-
trode and nozzle, and may make it difficult to strike the
pilot arc. If this occurs, use fine sandpaper to clean the
end of the electrode and the interior of the nozzle.
• 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 qualified 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.2).
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using com-
pressed air.
inc.
1/2
PLASMA PROF 55
10 12 14
mm
5/8 3/4
16 18 20
7/8
160
140
120
100
80
60
40
20
22
Fig. 6