Operation; Paper Take-Up Control (Tray1); Tray1 Double Feed Control; Deceleration Control - Konica Minolta bizhub c450 Service Manual

Theory of Operation Ver. 1.0 Mar. 2005

16.3 Operation

16.3.1

Paper Take-up control (Tray1)

Main Motor (M1)
Tray1 Paper Feed Clutch (CL1)
Intermediate Transport Motor (M14)
Registration Roller Clutch (CL3)
Registration Roller Sensor (PC28)
16.3.2

Tray1 double feed control

• To reduce paper misfeed involved with double feed, the Tray1 Double Feed Sensor is
provided at a point immediately after the Tray1 Paper Take-up Roller.
• If the second sheet of paper reaches the Tray1 Double Feed Sensor during the paper
take-up sequence for the first sheet of paper, the paper take-up motion is delayed to
allow an appropriate distance between two successive sheets of paper.
Tray1 Paper Take-up Roller
2nd Sheet of Paper
16.3.3

Deceleration control

• Deceleration control is provided only when paper is fed from Tray2, Tray3, Tray4, LCC, or
Bypass with a system speed of 215 mm/sec., 165 mm/sec., or 60 mm/sec. The Tray2
Vertical Transport Motor (M103), Tray3 Transport Roller Motor (M120-PF), Tray4 Trans-
port Roller Motor (M121-PF), and Transport Roller Motor (M2-LCT) are controlled so that
the period of time that begins when the paper take-up sequence is started and ends
when the leading edge of the paper reaches the Registration Roller becomes a predeter-
mined value. The control thereby prevents a paper misfeed from occurring and ensures
productivity.
• The deceleration control is provided based on the information on the timing, at which the
Tray2 Vertical Transport Sensor (PC108), Tray3 Vertical Transport Sensor (PC117-PF),
Tray4 Vertical Transport Sensor (PC126-PF), and LCT Vertical Transport Sensor (PC2-
LCT) are activated.
Start Key ON
Registration Roller ON
1st Sheet of Paper
Registration Roller
Tray1 Double Feed Sensor (PC13)
16. Paper feed section
Registration Roller ON
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