17. MULTI BYPASS SECTIO
N
(MB-503)
Theory of Operation
V
er. 1.1 Apr. 2010
46
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COMPOSITION/
OPERA
TION
17.3.2
Paper feed control
A. Pick-up control
• The feed roller is driven by the main motor through the bypass paper feed clutch.
• When the bypass paper feed clutch (CL3) is energized, drive from the main motor (M1) is
transmitted to the pick-up roller via the paper pick-up clutch and the pick-up roller is
rotated.
B. Multiple sheet feeding prevention control
• The coefficient of friction between the Feed Roller and Separation Roller is effectively
used to prevent double feed of paper.
When one sheet of paper is taken up:
The coefficient of friction on the front side of the sheet of paper taken up and fed through
the space between the feed roller and separation roller is the same as that on the backside
of the sheet of paper, allowing the paper to be properly fed into the machine.
When two or more sheets of paper are taken up:
• The coefficient of friction between the paper and the separation roller is greater than that
between the sheets of paper, which allows only the top sheet of paper to be fed into the
machine.
A0XXT2C530AA
Separation roller
Feed roller
Paper
