E - Tapered Electrode Fitting, Screw-On Nozzle - Lincoln Electric NERTAJET CPM 250 Safety Instruction For Use And Maintenance

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.
In order to obtain nice cuts, it is absolutely necessary for the
tapered electrode to be ground and properly centred.
Rapid wear of electrode
If, after re-grinding, new destruction
E-24
VERY IMPORTANT :
DEFECT
NOTE :
After grinding, rub lightly with emery cloth, lengthways.
SOLUTION
Re-grind in the longitudinal sense of the electrode
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).
8695 9064 / L
CPM 250-300-720-900