12.3 Operation; Paper Take-Up Control (Tray1); Tray1 Double Feed Control; Deceleration Control - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004

12.3 Operation

12.3.1

Paper Take-up control (Tray1)

Main Motor (M1)
Tray1 Paper Feed Clutch (CL1)
Intermediate Transport Motor (M14)
Synchronizing Roller Clutch (CL3)
Synchronizing Roller Sensor (PC28)
12.3.2

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
12.3.3

Deceleration control

• Deceleration control is provided only when paper is fed from Tray2 or Bypass with a sys-
tem speed of 165 mm/sec. or 100 mm/sec. The Tray2 Vertical Transport Motor is con-
trolled so that the period of time that begins when the paper take-up sequence is started
and ends when the paper reaches the Synchronizing Roller becomes a predetermined
value. The control thereby prevents a paper misfeed from occurring and ensures produc-
tivity.
• The deceleration control is provided based on the information on the timing, at which the
Tray2 Vertical Transport Sensor is activated.
Start Key ON
Synchronizing Roller ON Synchronizing Roller ON
1st Sheet of Paper
Synchronizing Roller
Tray1 Double Feed Sensor (PC13)
2-55
Paper feed section
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