15
5. REPLACING THE CONSUMABLES
IMPORTANT: Switch the power source off before re
-
placing any consumables.
Making reference to Fig. 7 and Fig 8, parts subject to
wear are electrode
A
, swirl ring
B
, nozzle
C
and nozzle
protection
E
(only for torch CP161). These should be re-
placed after unscrewing the nozzle holder
D
.
Electrode
A
must be replaced when it shows an approx
1.2 mm deep crater at the center.
CAUTION: do not use sudden force to unscrew the elec-
trode; work gradually to release the thread. The new
electrode must be screwed into the seat and fastened in
place without tightening fully.
The nozzle
C
must be replaced when the central hole
is damaged or wider than that of a new part. Delays in
replacing the electrode or nozzle will cause the parts to
overheat, and jeopardize the life-span of the swirl ring
B
.
Make sure that the gas nozzle holder
D
is firmly tightened
after replacement.
Fig.7
Fig.8
D
C
B
A
A
B
C
D
E
WARNING: screw the nozzle holder
D
onto the welding
torch body only when electrode
A
, swirl ring
B
, nozzle
C
and nozzle protection
E
(only for CP 161) are assembled.
If any of these parts are missing, this will interfere
with smooth operation of the machine and, especial
-
ly, jeopardize operator 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 consuma-
bles, welding torch damage and reduction in cutting ra-
pidity and quality.
- Air impurities cause oxidation of the electrode and noz-
zle 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. 2).
To assure efficiency of these protective devices:
•
Do not remove nor by-pass the protective devices.
• Replace them with original Cebora spare parts.
•
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
qualified 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
SELECTION
(by pressing the button
W
)
DESCRIPTION
SELECTION
(by turning the knob
Z
)
SEN
Spot ENable
(enable/disable spot
marking function)
OF = disable
ON = enable
t
SI
Spot Current
(spot marking current)
From 10 to 39 A
t
St
Spot Time
(spot marking time)
OF
From 0.01 to 99 s/100
Tab. 1
