
B-70315EN/02 8.LASER OPTICAL SYSTEM
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(j) Repeat Steps (g) through (i) until all dirt on the mirror surface is
removed. Finally, clean the mirror surface with ethyl alcohol.
(k) Clean the back surface of the mirror similarly.
(l) Wipe the mirror holder and O-rings with ethyl alcohol.
(m) An arrow mark is provided on the side of the output coupler, and
a line is drawn above the mark with a felt-tipped marker. If the
line has disappeared, look for a mark-off line. Place the output
coupler on the holder. At this time, ensure that the reflecting
plane (the plane indicated by the arrow on the side of the mirror)
of the output coupler does not face the holder but faces the
opposite direction, and that the arrow on the side of the output
coupler is aligned with the round mark of the mirror holder.
Insert the O-rings evenly so that the mirror does not float.
Fig.8.2.1(b) Method of installing the mirror holder
(n) Install the mirror holder by reversing steps (b) through (d). The
mark on the mirror holder is provided on the bottom for C1000-E,
C2000-E, and C6000-E, and is provided on the side for C4000-E
and C5000-E.
Tighten the mirror holding screw then loosen it. Next, turn it by
fingers. After feeling a resistance, retighten the screw by 30
degrees.
(o) Close the main circuit breaker or turn on the power supply of the
laser oscillator, then turn on the power to the CNC. Perform
evacuation. When the gas pressure (DGN. 905) reaches 100 or
less, retighten the mirror holding screw.
(p) Perform a leakage check.
(q) Install the beam cover. This completes cleaning and replacement
work.
(2) Cleaning and replacing the rear mirror
(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 power sensor.