Hypertherm LR2075 - Manual (Page 35)

OPERATION
4-10 LR 2075 Laser Head Instruction Manual
Maintenance
Nozzle inspection
– Inspect nozzle orifice for damage.
– Inspect for excessive beam hole (double the kerf width or greater) through baffle of Hypertherm FAST Laser
nozzles. The beam hole diameter should be approximately equal to the kerf width.
– Inspect for spatter on nozzle.
– Replace nozzle if damaged
Lens inspection
– Inspect for scratches and foreign material on lens.
– Inspection using cross-polarization may be necessary to reveal damage to the substrate. Cross-polarization is
achieved by arranging two polarized sheets so that you can not see through them. Hold the two sheets
together. If you can see through them, they are parallel. Turn one sheet 90
° and they will become opaque (cross-
polarized).
– Hold one sheet above the lens and one below. Damage to the substrate of the lens will become visible.
– Replace lens if damaged.