Lincoln Electric NERTAJET CPM 250, Инструкция по технике безопасности, эксплуатации и обслуживанию

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8695 9064 / L
J - RECOMMENDATIONS FOR USE
CPM 250-300-720-900
J-49
DEFECTS SOLUTIONS
Destruction of the nozzle - The destruction of a nozzle can be caused by :
- a power increase which is too quick : increase the power run-up
time-delay,
- contact with the part due to a metal projection during arcing in
middle of sheet metal : raise the torch at time of transfer,
- direct contact with the part,
- a lack of cutting gas : check the flowrate or the cutting gas circuit,
- intensity too great for the diameter of the nozzle used : see scale,
- poor cooling : check the flow on the return circuit and the
temperature of the cooling circuit.
Destruction of the water vortex nozzle : - Check the power supply as well as the vortex water flow
(flow of vortex water in the shape of an umbrella).
- instantaneous destruction
-.quick destruction. - Check the quality of the cutting gas, mainly for the compressed air
(it may be charged with water and oil).
- Increase the cutting gas pressure.
- Check the duration of the time-delay of the power run-up.
- Increase the time-delay for the cutting gas supply / power run-up
phase-shift.
- Avoid contact with the part to be cut.
Destruction or rapid wear of flat electrodes - Check the type of electrode according to the gas used and intensity
used :
W=
tungsten nitrogen
H =
hafnium oxygen or industrial air
- Check the condition of the gas barrel.
-.Increase the pressure of the cutting gas.
- Check the cooling circuit.
- Plunger tube in poor condition (water flowrate condition).