Selco SP 70 Instrucciones De Uso página 20

3 MAINTENANCE
With the SP 70 torch, the ignition of the pilot arc takes place by
pneumatic distancing of the electrode from the nozzle; during
the operation, oxidized area are created on the two compo-
nents, that can give ignition problems.
The efficiency of the electrode is therefore not only determined
by the cutting time, but also by the number of starts of the pilot
arc that are made.
It is advisable to replace the electrode before the tungsten insert
in the point is completely worn out.
The nozzle has an average life similar to that of an electrode, and
is replaced when an irregular hole is present which is larger than
the nominal one (this can cause slanted cuts of poor quality).
Electrode and nozzle are replaced simultaneously to prolong
their active life.
Working with electrode and nozzle which are too spoiled can
cause damage to the torch body.
It is important to pay special attention to the fitting of the elec-
trode and nozzle in order not to irreparably damage the torch.
Routine maintenance must be carried out on the
system according to the manufacturer's instruc-
tions.
Any maintenance operation must be performed by qualified
personnel only.
Unauthorized changes to the system are strictly forbidden.
Disconnect the power supply before every opera-
tion!
Check the electric connections and all the connec-
tion cables.
For the maintenance or replacement of torch components,
electrode holders and/or earth cables:
Check the temperature of the component and
make sure that they are not overheated.
Always use gloves in compliance with the safety
standards.
Use suitable wrenches and tools.
Failure to carry out the above maintenance will invalidate all
warranties and exempt the manufacturer from any liability.
20