HP 220 - Manual (Page 37)

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 Opticalsensor: 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 opticalsensor detects that the primary flag is back in it's originalposition, the
roller motion slows down but needs some time to overcome the system's inertia before being
able to reverse the direction of rotation.