56
c Paper Feed Section
chap.2
1. Description
Feeding of the paper is performed by the paper separator (employing the center separation method) and paper
feed roller (there is no corner finger). Elevation of the feed tray is powered by the elevator motor.The paper
top detect sensor is equipped at the rear of the paper feed roller. When the paper does not reach the paper
lead edge sensor or the signal sensor during the preliminary feeding, “PAPER JAM ON FEEDER SIDE”
appears. Paper fed by the paper separator and paper feed roller is fed further by the timing roller and guide
roller to the point where its leading edge is sandwiched between the drum and the press roller. Then the
pression of the timing roller and guide roller is released (by moving the guide roller upward several mm), so
that the paper is fed through at a speed equal to the circumferential speed of the drum and press roller. The
press roll sensor senses the paper feed condition; if a feed error occurs, the message “PAPER JAM ON
FEEDER SIDE” is
displayed.
For details, see “1.Paper Jam Detection Timing” in chapter 2 (n Paper ejection section).
\See page 83
cPaper Feed Section
Signal sensor
R8S02040
Paper separator
Paper feed roller
Elevator motor
Support paper tray
Timing roller
Press roller
Guide roller
(Press roll sensor)
Paper sensor
Elevator top limit sensor
Elevator lower
limit switch
Paper feed stepping motor
Vertical registration
section
Paper top detect sensor
Vertical reg.
center sensor
Vertical reg.
encoder sensor
Vertical reg. motor
Signal solenoid
Emergency
signal solenoid
Paper width
sensor
Paper length
sensor
Horizontal
registration section
Horizontal reg.
center sensor
Horizontal reg.
encoder sensor
Horizontal
reg. motor
Heavy weight
paper lever sensor
Paper feed ring lift solenoid
Double feed detect sensor
(O.P: DP-S550/S520/S510)
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