Paper Feed Control - Konica Minolta BizHub C360 Service Manual

Theory of Operation Ver. 1.0 Jul. 2009
17.3.2

Paper feed control

• Tray1 and Tray2 are controlled in the same control procedure.
A. Pick-up control
• The paper feed clutch is energized after the lapse of a predetermined period of time after
the print start signal.
• The driving force of the transport motor is transmitted to the pick-up roller and paper feed
roller when the paper feed clutch is energized. These rollers rotate to pick up and feed a
sheet of paper into the machine.
B. Separation control
• The separator roller is driven via a torque limiter in a direction opposite the paper trans-
port direction.
• The separator roller is pressed up against the paper feed roller by the pressure of a
spring and an acting pressure generated from torque of the torque limiter.
• The acting pressure of the paper feed roller/separator roller/torque limiter serves as the
limit torque for preventing double feed.
• When there is no sheet of paper or only one sheet of paper between the separator roller
and paper feed roller, the limit torque is exceeded and the separator roller follows the
rotation of the paper feed roller.
• If there are two or more sheets of paper between the separator roller and paper feed
roller, the limit torque is greater than the friction force of the paper, so that the separator
roller is rotated backward.
• The backward rotation of the separator roller causes the lower sheet of paper in contact
with the separator roller to be pushed backward in the direction of the tray, so that the
lower sheet of paper is properly separated.
Pick-up roller
Paper
17. PAPER FEED SECTION
Paper feed roller
Paper separator
roller
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