Ricoh Beluga-C1 Training page 250

Paper Size Sensor 1 (Width) –
A4 SEF
This shows the outputs of CN 1 to CN4 for each paper size.
But for some paper sizes, the outputs are the same, so the
sensor cannot distinguish them.
In these cases, the machine must use the length sensors.
Slide 250
This example shows how the sensor operates for international paper sizes.
For some sizes, the length sensors must be used to detect the correct size,
because the rotary switch output is the same.
For A4 LEF and A3 SEF, these widths are the same, so the width sensor
cannot distinguish them.
But for B4 LEF and A2 LEF, the widths are different. Why can the sensor
not distinguish the difference? This is because the wheel turns more than
one time. By coincidence, the wheel position is about the same for these
two different paper widths, and the width sensor cannot distinguish them.
The length sensor must be used.
Length sensor 2 is only used for USA Architecture paper sizes.
International Sizes
A3 LEF A2 LEF*
B4 LEF*
A4 LEF*, A3 SEF*
250
Beluga-C1/C1.5 Training
CN1
CN2
CN3
CN4
B4 SEF
B3 LEF