Service manual

LUMISCAN ACR-2000 SERVICE MANUAL - SECTION 8.0 REPLACEMENT PARTS
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4. Unplug the Galvo Motor cable from the driver board.
5. Remove the four 7/64” hex-head screws holding the Galvo motor from the Galvo
mount assembly. Be very careful not to scratch the replicating mirror.
6. Remove the Galvo motor and retain the 4 plastic shoulder washers and plastic isolation
gasket.
7. Remove the replicating mirror from the galvanometer shaft.
7a. The mirror is secured by a .050” nylon tipped set screw. It is not necessary to
remove this set screw entirely. Just loosen it enough to easily remove the mirror.
Leave the set screw in place.
7b. Be very careful to not touch the mirrored surface when removing the mirror from
the galvanometer shaft. It is best to use a soft lens cleaning paper or cloth and grip
the sides of the mirror with your fingers and slowly slide the mirror off the
galvanometer shaft.
REPLACEMENT
Re-install the new Galvo motor in the reverse order except do not re-place the mirror
until the other components are in place. Re-installing the tie-wrap and isolation gasket
are important steps. That galvo cable, if not tied up, could obstruct the laser exiting the
galvo tower.
Replacing the Replicating Mirror and Locating Mechanical Center.
1. After the Galvanometer is securely mounted on the galvo tower slide the replicating
mirror back onto the galvanometer shaft.
2. Place a Post-It note or similar object, centered, over the entrance slot of the
collection chamber.
3. With a pen or pencil mark the Post-It with a dot on the horizontal center of the
collection chamber. This can be done by eye using landmarks such as the PMT
towers. Bisect the area between the PMT towers to find the center of the collection
chamber. Do not use the tape on either side of the collection chamber as a
reference.
4. Ensure that J14 on the DACQ and J3 on the Galvo PCA are unplugged. This will
disallow high voltage to the tubes and power to the galvo respectively. Ensure that
the interlocks are actuated.
5. Turn on power.