Ricoh DD 5450, Field Service Manual, Page: 134 / 403

３
132
Chapter 3 Paper Feed Section
Description
When the PRINT POSITION key on the control panel is pressed, the link cam is driven by the
vertical registration motor. As the link cam moves, the cam follower position (bearing) from the
paper feed cam changes. Accordingly, drive timing for the timing roller can be changed.
● Press the key:
Cam follower moves in the direction of white arrow: Drive timing of the timing roller becomes
faster. Paper timing becomes earlier, and
the image moves backward.
● Press the key:
Cam follower moves in the direction of black arrow: Drive timing of the timing roller becomes
later. Paper timing becomes later, and the
image moves forward.
3. Functions of Parts
(1) Printing Position Adjusting Mechanism
1
2
The printing position is adjusted by changing the
timing of the paper toward the drum with the (PRINT
POSITION) key on the control panel.
When the print positioning is set to 'ON', the
printing position can be adjusted by pushing the
PRINT POSITION keys while printing.
● Print position display changes from "in mm" to
"in steps".
The adjustment range is 30 steps in a vertical
direction and 20 steps in a horizontal direction.
Paper feed cam
Cam follower
Timing roller
Link cam
Vertical reg.
motor
Vertical reg. limit sensorVertical reg. center sensor
Vertical reg.
encoder sensor
Print paper
Print paper
Image
Image
Pressing key makes the cam
follower move in the direction of white
arrow in the left illustration.
Pressing key makes the cam
follower move in the direction of black
arrow in the left illustration.
Paper feed
direction
Paper feed
direction
IMPORTANT
3