Generator Maintenance - Cebora PLASMA PROF 123 Manual De Instrucciones

4.3 GOUGING ("GOUGE" OPERATING MODE)
fig. 6
This operation makes it possible to remove defective
welds, to separate welded pieces, to prepare edges,
etc. For this operation use a 3 mm ø nozzle.
The value of the current to be used varies from 60 to
120A depending on the thickness and quantity of mater-
ial to be removed. With the welding torch in slanted
position (fig.6) 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
recommended to frequently clean them so as to avoid
problems (double arc) which may destroy the nozzle in
few seconds. Given the strong (infrared and ultraviolet)
radiation emission during this operation, it is recom-
mended that the operator and people nearby wear an
adequate protection.
Once the operation is completed, turn the machine off.
5. REPLACING THE CONSUMABLES
IMPORTANT: Switch the power source off before
replacing any consumables.
Making reference to Fig.7 ,
parts subject to wear are as
follows: electrode C, swirl
ring B, nozzle E, and nozzle
protection F. These should
be replaced after unscrew-
ing the nozzle holder D.
Electrode C must be
replaced when it shows an
approx 1.5 mm deep crater
at the center. IMPORTANT:
When unscrewing the elec-
trode do not force it but
apply a progressive strength
until the thread is disen-
gaged. The new electrode
must be screwed in its seat
12
All manuals and user guides at all-guides.com
C
B
E
D
F
fig. 7
and locked without tightening all the way down.
Nozzle E is to be replaced when its central hole is dam-
aged or enlarged as compared to a new one. Delayed
replacements of electrode and nozzle cause overheating
, which can reduce swirl ring B life. After these replace-
ments, check that the nozzle holder D is accurately tight-
ened.
IMPORTANT: screw the nozzle holder D onto the weld-
ing torch body only when electrode C, swirl ring B and
nozzle E are assembled. If these elements are not
assembled the equipment operation is jeopardized as
well as the operator's safety.
6. HINTS
- Should the equipment air contain plenty of moisture
and oil the use of a filter dryer is recommended. This will
prevent excessive oxidation and wearing of consum-
ables, welding torch damage and reduction in cutting
rapidity and quality.
- Air impurities cause oxidation of the electrode and
nozzle and may make pilot arc start-up more difficult. If
this condition is present, clean the electrode terminal
end and the nozzle interior with thin abrasive paper.
- Make sure that the new electrode and nozzle that are
going to be assembled are perfectly clean and oil-free.
- To avoid welding torch damage always use Cebora
original parts.
7 DESCRIPTION OF PROTECTIVE DEVICES
The equipment comes with different protective devices
highlighted by "Err" on the displays U and V. (See tab. 1).
To assure efficiency of these protective devices:
• Do not remove nor by-pass the protective devices.
• Replace them with original Cebora spare
• Always replace any damaged parts of the machine
or the welding torch with original parts.
• Use torches CEBORA Type CP 161 only.
8 MAINTENANCE
Any maintenance operation must be carried out by qua-
lified personnel in compliance with standard CEI 26-29
(IEC 60974-4).

8.1 GENERATOR MAINTENANCE

In the case of maintenance inside the machine, make
sure that the switch A 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 J (fig.1).
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using com-
pressed air.
parts.