Gripping the Media
When you load the media, it is gripped by the pinch/arms.
PinchArm Sensor
The pinch/arm sensor is a switch sensor that is attached to the Printer Chassis. It detects the position of the pinch/arm lever. Linkage, attaching the lever to a cam, causes the cam to release the switch as the pinch/arms are raised. The pinch/arm sensor is electrically connected to the main PCA.
Providing a Force on Top of the Media
Bail
The bail provides a normal force on top of the media. There is no bail sensor on the Printer to detect if the bail is up or down.
BailLift Mechanism
The bail features an automatic lift mechanism driven by the media motor using a series of gears and actuated by the cartridge carriage. The cable/based design eliminates the torque on the axle of the bail/lift cam and thus improves reliability. This mechanism is also more accessible. (Removal ' page 8/28.)
Detecting the Lines and Media Edges
Line Sensor
The line sensor on the cartridge carriage is used to:
DDetect the left and right media edges.
DDetect and measure lines drawn on media when performing accuracy calibration.
DScan the setup and alignment sheets.
DFind the platen roller reference mark.
Functional Overview | HP DesignJet 430, 450C and 455CA Printers |