
8.LASER OPTICAL SYSTEM B-70315EN/02
- 228 -
8.2.1 Cleaning and Replacing the Output Coupler and Rear Mirror
(1) For output coupler
(a) Turn off the power to the CNC, then turn off the main circuit
breaker and power supply for the laser oscillator.
(b) Before starting cleaning, wipe away any foreign matter from
around the mirror holder. Then, remove the mirror cover.
(c) When the pressure of the vacuum system of the oscillator is
lower than the atmospheric pressure, the output coupler may be
sucked, making it difficult to remove the output coupler. Check
that the oscillator is in the purge state, and loosen the blind joint
on the top of the turbo blower to allow the internal pressure of
the vacuum system to equalize with the atmospheric pressure.
(d) Loosen the mirror holding screw, then remove the mirror holder
from the mirror stage.
Fig.8.2.1(a) Exploded view of the output coupler
(e) Remove the output coupler from the mirror holder, then place the
output coupler on lens cleaning paper. Check the removed
O-rings. Replace an O-ring that is damaged or has lost elasticity.
Proceed to step (l) to replace the mirror.
(f) Gently blow clean air by using a camera blower across the mirror
surface to remove dust and dirt.
(g) Drip ethyl alcohol or lens cleaner onto the mirror surface, and
gently wipe dirty areas by using a cotton swab moistened with
the fluid.
(h) Place lens cleaning paper on the mirror, then spray ethyl alcohol
or lens cleaner over the paper and mirror. Then, move the lens
cleaning paper horizontally to and fro across the mirror.
(i) Remove any fiber dust by blowing clean air with a camera
blower.