Lincoln Electric NERTAJET CPM 250, Safety Instruction For Use And Maintenance

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8695 9064 / L
E-24
CPM 250-300-720-900
E - TAPERED ELECTRODE FITTING, SCREW-ON NOZZLE
This fitting is used to implement the plasma processes :
- Mainly :
the argon-hydrogen
(mixture with 80 % argon + 20 % hydrogen)
- Sometimes nitrogen.
This fitting works with :
- tapered electrodes in thoriated tungsten at 2 % whose diameter depends on the
cutting intensity,
- a barrel witch a laminar gas flow,
- cone nozzles marked with an intensity value.
This value corresponds to the maximum intensity the nozzle can support without
being destroyed.
Generally, this also corresponds to the cutting intensity value displayed on the
generator.
VERY IMPORTANT :
In order to obtain nice cuts, it is absolutely necessary for the
tapered electrode to be ground and properly centred.
DEFECT SOLUTION
Rapid wear of electrode Re-grind in the longitudinal sense of the electrode
If, after re-grinding, new destruction Insist on the re-grinding :
this is the only solution which enables detection of a
passage in which the electrode will be kept in proper
condition for a long-duration cut (variable compactness
of the electrode)
See also, the quality of the pilot gas (argon).
NOTE :
After grinding, rub lightly with emery cloth, lengthways.