Paper Length Detection (Paper Feed Station) - Ricoh A151 Field Service Manual

12. PAPER FEED

12.1 PAPER LENGTH DETECTION (Paper Feed Station)

The paper length is measured by the registration sensor while paper is fed
past the registration sensor. The determined paper size is stored in memory.
This is performed during the first copy of a copy job.
As shown by the following table, the CPU determines the size of the paper in
the paper tray based on the paper length measured by the registration
sensor.
Paper length (mm)
364
356
330
297
279
267
257
254
216
210
Since the CPU does not have the paper length in memory for the first copy
cycle, the CPU controls the machine for the maximum paper size of B4 (257
mm x 364 mm).
From the second copy cycle on, the CPU controls the machine for the correct
paper size based on the data stored during the first paper cycle.
Whenever the by-pass feed table is used, the CPU determines the paper size
to be B4 (257 mm x 364 mm).
SM
Paper size
B4
10" x 14"
8 " x 13"
1/2
A4R
8 " x 11"
1/2
8" x 10 "
1/2
B5R
8" x 10"
5 " x 8 "
1/2 1/2
A5R
8-19
PAPER FEED
A202/A203