Paper feeder presence detection
The Tray 3 paper present (SR3) detects whether the paper is present in the paper-feeder .
Paper-feeder multiple feed prevention
The paper-feeder uses a separation roller to prevent multiple sheets of paper from entering the printer.
The separation roller prevents multiple feeds of paper by allowing the paper-feeder separation roller to
rotate in the same direction as the paper-feeder feed roller 1. The paper-feeder separation roller is
equipped with the torque limiter. If multiple sheets of paper are picked up, the torque limiter takes
control of the paper-feeder separation roller, and pushes the extra sheets back to the paper-feeder .
That way, only the top sheet is fed to the printer.
Figure 1-49 Paper-feeder multiple feed prevention
No-load Rotational force for paper-feeder separation roller: Pushes
back the media into the paper-feeder
Rotational force for paper-feeder feed roller 1: Feeds media
into the printer
62 Chapter 1 Theory of operation ENWW
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