Ricoh FT6645 Manual page 62

23 April 1993
3.6 3RD SCANNER DRIVE
[B]
[A]
40 steps
To compensate the focus for reproduction and lens position changes, the 3rd
scanner (4th and 5th mirrors) position is changed.
A stepping motor [A] (approx. 0.095 mm/step) is used for the 3rd scanner
drive.
The 3rd scanner home position sensor [B] is used to detect the unit position
for full size mode. The optic control PCB keeps track of the unit position
based on the number of motor drive pulses.
(Initialize)
(Reduce/Enlarge → HP)
(Reduce/Enlarge → Reduce/Enlarge)
(Reduce/Enlarge → Reduce/Enlarge)
(Reduce/Enlarge →Enlarge/Reduce)
40 steps
2-37
OPTICS