Pick-Up And Separation - Ricoh Di-C1.5a Manual

Pick-up and Separation

Feed
Clutch
Feed
Belt
Pick-up solenoid: Lifts the original table, to lift the originals
to the pick-up roller
Feed motor: Controls the rollers
Feed clutch: Controls the pick-up roller and feed belt
Slide 278
Main points about the mechanism
The feed 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 original 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 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 original 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.
Feed Motor
278
Di-C1.5 Training
Pick-up
Roller
Separation
Roller