Elettro CF PLASMA 36, Instructions Manual

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9
3.4 EXCESSIVE WEAR ON CONSUMABLE 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.
4 HELPFUL HINTS
y 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,
damage to the torch and a reduction in the speed and
quality of the cutting.
y The impurities in the air encourage oxidation of the
electrode 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.
y Make sure that the new electrode and nozzle to be
mounted are thoroughly clean and degreased.
y Always use original spare parts to avoid damaging
the torch.
5 MAINTENANCE
Always cut off the power supply to the machine before any
operation, which must always be carried out by qualified
personnel.
5.1 GENERATOR MAINTENANCE
In the case of maintenance inside the machine, make sure
that the switch
N is in position "O" and that the power cord
is disconnected from the mains.
Also make sure that there is no voltage at the ends of the
IGBT group capacitors.
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
O (pict. 2).
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using
compressed air.
5.2 TORCH MAINTENANCE (See spare parts list)
Replacement of consumable parts
The parts subject to wear are electrode 17 , diffuser 18 and
nozzle 19 . All parts may be only replaced after loosening
nozzle holder 20 . Electrode 17 should be replaced when a
1/16" (1,5 mm) deep crater is created in the middle (see
picture 6). Nozzle
19 should be replaced when its central
hole is damaged or enlarged in comparison with the new
part (see picture 7).
The use of a worn electrode quickly wears out the nozzle.
When the electrode is worn, the power cut of the machine
is reduced. A delayed replacement of electrode and nozzle
causes overheating of consumable parts and reduces the
life of diffuser
18 . Make sure that after replacing it, nozzle
holder 20 is tight enough.
ATTENTION! Nozzle holder 20 should be screwed on
head only when electrode 17, diffuser 18 and nozzle 19
are assembled.
5.3 Troubleshooting
The LED
A lights when the following conditions occur:
LED A CONDITION SOLUTION
Steadily lit
Upon equipment
start-up
Wait 5 sec
Steadily lit
Button pressed
during equipment
start-up
Release the
button
Steadily lit
Incorrect IGBT
drive voltage Contact technical
service
Steadily lit
Supply voltage
too low Check the supply
voltage
Flashing lit
Short-circuit
between
electrode and
nozzle during
equipment start-
up or during
cutting
Replace the
electrode and
gas nozzle, and
diffuser if
necessary
5.4 PRECAUTIONS AFTER REPAIRS.
After making repairs, take care to organize the wiring so
that there is secure insulation between the primary and
secondary sides of the machine. 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
original machine.