Pick-Up And Separation - Ricoh B230 Training Program

A pick-up solenoid lifts the entrance guide, to bring the
stack of originals up to the pick-up roller
The transport motor controls all the rollers in the DF
The feed clutch controls the pick-up roller and feed belt
Main points about the timing chart
The transport motor has two speeds. It feeds the first original to the glass
quickly, but is slower for scanning (the speed during scanning is set by the
reproduction ratio).
The second original feeds in while the first one is scanned - the pick-up
solenoid controls the timing (but if the fax stamp is used, the clutch and
solenoid both turn off/on).
The DF clutch stays on all the time and, because of this, it does not control
original feed-in. But, if the stamp is used, it turns off during scanning, and
turns on to feed in the next page after the previous page is stamped.
The original trailing edge sensor detects the trailing edge of the last original,
before the original set sensor does.
The original set sensor detects if an original is in the feeder. Why not use that
sensor? Why is one more sensor necessary?
In this machine, the copier feeds copy paper into the machine first, to
increase the copy speed. The original trailing edge sensor tells the copier
that there are no more pages to be scanned. The copier can then stop
paper feed.
Look at the component diagram. The original set sensor is near the scan
line, to tell the cpu that an original is in the feeder and is ready to be
scanned. This is too far into the machine to tell the cpu sufficiently early to
stop the next sheet of copy paper.
The trailing edge sensor is much nearer to the trailing edge of the stack.
This gives sufficient warning to the cpu when the last page of the original is
fed in.

Pick-up and Separation

202
202