Roland VersaUV LEJ-640 Service Notes page 163

Remove the Encoder Scale by removing the Plate fi xing the
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Encoder Scale at its right end and the Spring on its left end.
Remove the Spring Plate from the Encoder Scale and fi x it to
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the Encoder Scale where there is no black dot written on it.
Make sure not make scratches or put grease on
the Encoder Scale when fi xing it.
Do not touch the surface of the Encoder Scale.
Put the Encoder Scale in between the Encoder Plate and the
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Guide Rail.
Do not loosen or tighten the screws fi xing the En-
coder Plate.
Fix the right end with the Plate and hook up the Spring on the
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left end.
Make sure that the Encoder Scale fi ts in place.
Move the Head Carriage in entire width of the machine.
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Make sure that the Encoder Scale doesn't make contact with
the Encoder Module and also Encoder Scale is inside the slit
of the Encoder Module.
Perform the following setting.
[4-6 LINEAR ENCODER SETUP].
Spring
Spring Plate
Encoder Scale
Guide Rail
Spring
3-89
Encoder Scale
Plate
Black Dot
Encoder Plate
Encoder Scale
Plate
Screw