Image Shifting Section; Overall; Image Shifting Mechanism - Ricoh C226 Service Manual

IMAGE SHIFTING SECTION

9. IMAGE SHIFTING SECTION

9.1 OVERALL

The image on the printing paper can be shifted 20 millimeters in either the
rearward or forward direction by using the Image Shift keys on the operation
panel.
The image position is adjusted by the image shifting motor which will change
the paper feed timing by turning the first paper feed and second feed cams.

9.2 IMAGE SHIFTING MECHANISM

[K]
[N]
[O]
[P]
When the forward key (+key) is pressed, the image shifting motor [A] will turn
clockwise (in the direction of the arrow) and will drive the cam gear [J]
clockwise through gears [B], [C], [D], [E], [F], [G] and [H] as illustrated on the
next page.
The cam gear [J] has a spiral track in which the lever [K] moves along. When
the cam gear turns clockwise, the pin of the lever [K] will move towards the
outside of the cam gear [J]. Therefore, the lever [K] will move clockwise.
The lever [K] drives the gear [O] clockwise through the gear [N] and the first
paper feed and second feed cams mounted on the shaft of the gear [P] will
turn clockwise. As a result, the paper feed start timing is delayed compared
with drum rotation timing and the image position is moved in the forward
direction.
When the cam gear [J] turns, the gear [I] located behind the gear [J] turns
and the encoder [M] mounted on the gear [L] turns to check the image
shifting position.
C226 2-70 SM