Specifications

➁
◆ Lens Y Direction Reference Position Return
The movement of the Lens in the Y (crosswise) direction should be referred
to as that in the plus (+) or minus (−) direction, instead of in the enlargement
or reduction direction, since the Lens also needs to be moved in the Y
direction according to the paper size (width).
From the plus (+) side ( L
➡
H )
➀
M13 is energized to move the Lens toward the minus (−) side and
deenergized when Lens Y Direction Reference Position Sensor PC3 goes
from LOW (blocked) to HIGH (unblocked). This is the reference position.
From the minus (
−
) side ( H
➡
L )
➀
M13 is energized to move the Lens toward the plus (+) side. From the
point at which PC3 goes from HIGH (unblocked) to LOW (blocked), the
Lens is further moved two steps (approx. 0.22 mm) toward the (+) side
before M13 is deenergized.
➁
M13 is energized to turn backward and, when PC3 goes from LOW
(blocked) to HIGH (unblocked), it is deenergized. This is the reference
position.
2 Steps
Lens Y Direction Reference
Position Sensor PC3
+ Side ( L )
− Side (
H )
➀
➀
Rear Side, Enlargement Direction
Front Side, Reduction Direction
To enhance Lens positioning accuracy, the Lens is always brought to the
reference position from the plus (+) side. This compensates for the error
produced by backlash in the drive gears and part-to-part variations in the
moving mechanism.
M-50