Specifications

◆
Lens X Direction Reference Position Return
From the enlargement side ( H
➡
L )
➀
M12 is energized to move the Lens toward the reduction side and
deenergized when Lens X Direction Reference Position Sensor PC2 goes
from HIGH (unblocked) to LOW (blocked). This is the reference position.
From the reduction side ( L
➡
H )
➀
M12 is energized to move the Lens toward the enlargement side. From
the point at which PC2 goes from LOW (blocked) to HIGH (unblocked),
the Lens is further moved two steps (approx. 0.38 mm) toward the
enlargement side before M12 is deenergized.
➁
M12 is energized to turn backward and, when PC2 goes from HIGH
(unblocked) to LOW (blocked), it is deenergized. This is the reference
position.
Lens X Direction Reference
Position Sensor PC2
➁
➀
2 Steps
➀
Enlargement Side ( H ) Reduction Side ( L )
To enhance Lens positioning accuracy, the Lens is always brought to the
reference position from the enlargement side. This compensates for the
error produced by backlash in the drive gears and part-to-part variations in
the moving mechanism.
M-48