HP C3180A Service Manual - Page 37

Front Panel, Rear Edge Clears Primary Flag - driver windows 7

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4. Rear Edge Clears Primary Flag Drive roller slow speed inwards Media inserted Secondary flag Primary flag Leading edge of media Photo sensor window D Media: clears the primary flag D Primary flag: rotates 90° clockwise (original position Ć active) D Secondary flag: still in previous position (active) D Optical sensor: optical path blocked by falling edge of primary flag D Driver roller: slows down but still rotating inwards... D Front Panel: Load Media LED off, Busy LED on D Media Length Measurement: rear edge detected As soon as the optical sensor detects that the primary flag is back in it's original position, the roller motion slows down but needs some time to overcome the system's inertia before being able to reverse the direction of rotation. C3187Ć90000 Functional Overview 5Ć5

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5Ć5
Functional Overview
C3187Ć90000
4. Rear Edge Clears Primary Flag
Secondary flag
Primary flag
Photo sensor window
Media inserted
Leading edge of media
Drive roller
slow speed
inwards
D
Media:
clears
the primary flag
D
Primary flag:
rotates 90
°
clockwise (original position Ć active)
D
Secondary flag:
still in previous position (active)
D
Optical sensor:
optical path blocked by falling edge of primary flag
D
Driver roller:
slows down but still rotating inwards...
D
Front Panel:
Load Media LED off, Busy LED on
D
Media Length Measurement:
rear edge detected
As soon as the optical sensor detects that the primary flag is back in it's original position, the
roller motion slows down but needs some time to overcome the system's inertia before being
able to reverse the direction of rotation.