
11.LASER OPTICAL SYSTEM B-70255EN/01
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Procedure
(1) Turn off the power to the CNC, then open the main circuit
breaker or turn off the power supply of the laser oscillator.
(2) Loosen the mirror holder mounting screw, and remove the mirror
holder from the folding mirror unit. To simply replace the
folding mirror at this point, go to step (11).
(3) The folding mirror is attached to its holder using vacuum grease.
It is, therefore, very difficult to remove the mirror from its holder.
Therefore, clean the folding mirror without removing it from its
holder.
(4) Place the mirror with its reflecting side facing up. Gently blow
clean air (using, for example, a camera blower) across the mirror
surface to remove dust and dirt. Drop ethyl alcohol or lens
cleaner onto the mirror surface, moisten a cotton swab with the
fluid, and gently wipe any dirty areas.
(5) Place lens cleaning paper over the mirror, then spray ethyl
alcohol or lens cleaner over the paper and mirror.
(6) Move the lens cleaning paper horizontally to and fro across the
mirror.
NOTE
Since the lens cleaner has a high surface tension, it
may be difficult to move the cleaning paper. As the
paper is slowly moved to and fro across the mirror,
however, the ethyl alcohol will gradually evaporate.
(7) Blow clean air (using, for example, a camera blower) across the
mirror surface to completely evaporate the ethyl alcohol or lens
cleaner.
(8) Repeat steps (4) to (7) until all dirt on the mirror surface has
been removed.
(9) By using a cotton swab moistened with ethyl alcohol, clean that
part of the alignment unit which touches the mirror. This is
because flakes of coating may remain in this area. If the flakes of
coating are not removed, they may cause the mirror to become
misaligned.
(10) Install the mirror holder by reversing steps (2) to (3). Insert the
holder perpendicular to the alignment unit, so that the mirrors
touch the alignment unit evenly. When tightening the fixing
screws, tighten each screw evenly.