Novanta p400 OEM Series, Руководство пользователя

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Cleaning optical components
Debris or contaminants on external beam delivery components may affect laser processing and lead to
damage or failure of the optics and/or the laser.
Symptom:
• The laser loses power over time; laser output power must be increased to maintain performance.
Possible Causes:
• Beam delivery optics are coated by vapor residue or debris.
Shut down the laser and carefully inspect each optic in the beam delivery path. If the optic requires
cleaning, refer back to Maintenance for cleaning instructions. Use only recommended cleaning materials
(see Table 6-1) to prevent scratching delicate optical surfaces. If the focusing optic is pitted, it must be
replaced immediately. Because of the extremely high-power density of p400 lasers, pits or debris on the
lens surface may absorb enough energy from the focused beam to crack the lens. If this happens, other
optics in the beam path may be contaminated or damaged as well.
When the application requires air (instead of nitrogen) as an assist gas, we recommend the use of
breathing quality air available in cylinders from a welding supply company. Because compressed shop air
contains minute particles of oil and other contaminants that will damage optical surfaces, it must be
carefully filtered and dried before use as a purge or assist gas. Refer to the purge gas specifications, in
the Technical References chapter for filtering and drying specifications.
Caution: Possible Equipment Damage
Even small amounts of contamination on optics in the beam path can absorb enough energy to
damage the optic.
Inspect beam delivery optics periodically for signs of contaminants and carefully clean as required.
In dirty environments, purge laser optics using filtered air or nitrogen to prevent vapor and debris
from accumulating on optical surfaces.
If you operate your laser or marking head in a dirty or dusty environment, contact NOVANTA about
the risks of doing so and precautions you can take to increase the longevity of your laser, marking
head, and associated optical components.
Important – P400 lasers have several beam conditioning optics between the output aperture and the
faceplate. To prevent dust and debris from damaging these optical surfaces, always connect nitrogen
or filtered air to the laser’s
Gas Purge
port.
Warning: Serious Personal Injury
A risk of exposure to toxic elements, like zinc selenide, may result when certain optical or beam
delivery components are damaged. In the event of damage to laser, marking head, or beam delivery
optics contact NOVANTA or the optics manufacturer for handling instructions.