Cebora PC 6060/T Manual De Instrucciones página 11

restart" function using the push-button P (LED O lit).
When you have finished cutting, holding this push-button
down will cause the pilot arc to restart automatically.
Use this function only if necessary to avoid unneces-
sary wear on the electrode and nozzle.
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. 4)
• 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 SLANTED CUT
If the cut appears slanted, turn the machine off and repla-
ce the nozzle.
When the cutting current is above 45 A, prevent the nozz
le from coming into electrical contact with the workpiece
(even through scraps of molten metal), this condition cau-
ses rapid and at times instantaneous destruction of the
nozzle hole, leading to poor quality cutting.
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 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.
• 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.
Fig. 4
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