HP 220 - Manual (Page 38)

5Ć6 Functional Overview C3187Ć90000
5. Rear Edge Measured
Secondary flag
Primary flag
Photo sensor window
Media inserted
Leading edge of media
Drive roller
slow speed
outwards
D Media: pushes the primary flag
D Primary flag: rotates 90
° clockwise (active)
D Secondary flag: still in previous position (active)
D Optical sensor: optical path cleared by primary flag
D Driver roller: rotates slowly outwards...
D Front Panel: Load Media LED off, Busy LED on
D Media Length Measurement: rear edge detected when primary flag clears the sensor
The rear edge's position is located when the primary flag, pushed by the rear media edge,
clears the optical path.
If you pull the media parallel to the plotter length, while attempting to
clear a media jam, you could break the flags.
H F U T I O N
Gripping the Media
Pinch Arms
When you load media, it is gripped by the pinchĆarms. (Illustration ' page 10Ć27.)
PinchĆArm Sensor
The pinchĆarm sensor is an optical sensor that is attached to the right sideĆplate. It is used to
detect the position of the pinchĆarm lever. Linkage, attaching the lever to a sensor flag,
causes the flag to block and unblock the sensor as the pinchĆarms are raised and lowered.
The pinchĆarm sensor is electrically connected to the main PCA.