LASER EXPOSURE
SM 6-13 G065
Detailed
Descriptions
6.4.4 LASER BEAM PITCH CHANGE MECHANISM
When the LD positioning motor [A] turns, the metal block [B] in contact with the LD
unit housing [C] moves up and down and changes the position of L2 (L1 does not
move).
Both LD unit positions are at fixed distances from the LD unit home position sensor
[D].
Usually, the LD unit moves directly to the proper position. However, when the
number of times that the resolution has changed reaches the value of SP2109 07
(Pitch Change Count), the LD unit moves to the home position, and this re-
calibrates the LD unit positioning mechanism.
G065D543.WMF
[A]
[B]
[C]
[D]
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