Ricoh LDD250, Service Manual

Page: 405 / 459

PAPER FEED
SM 6-83 C262/C265
Detailed
Des
cription
s
6.8.4 PAPER REGISTRATION MECHANISM
Registration Roller Drive
The lower registration roller [A] is driven by the registration motor [B] (stepper
motor). When the paper comes into contact with the rollers, the motor remains
stopped to create a buckle in the paper to obtain precise paper registration and to
prevent paper skew.
Paper feed timing must be synchronized with the pressure cylinder rotation, so the
registration motor on timing is maintained by the feed start sensor [C].
A short time after the pressure cylinder [D] starts rotating, the actuator [E] on the
rear of the pressure cylinder activates the sensor. A pre-determined duration later,
the registration motor starts turning to feed paper to the drum and pressure cylinder.
After the printing paper is caught between the drum and the pressure cylinder, the
registration motor stops.
C262D075.WMF
C262D070.WMF
[A]
[B]
[C]
[D]
[E]
[F]