HP Enterprise CC490A manual 35Cassette lift mechanism, Cassette multiple-feed prevention

Cassette lift operation and cassette paper-presence detection

The product keeps the paper stack surface at the correct pickup position. The cassette lift-up operation is performed under the following conditions:

●The product is turned on

●The cassette is inserted

●The paper stack surface in the cassette lowers

Figure 1-35Cassette lift mechanism

Lifter motor M7

Lifting plate

DC controller

Cassette media stack surface sensor 1

Cassette media stack surface sensor 2

SR23 SR24

Cassette media presence sensor SR1

Cassette media stack surface sensor lever

Cassette media presence sensor lever

Lifter

The operational sequence of the cassette lift-up is as follows:

1.The lifter motor rotates and the lifter moves up.

2.When the cassette-media stack surface sensor 2 detects the stack surface of media, the lifter motor stops.

3.The lifter motor rotates again to lift the lifter when the cassette-media stack surface sensor 1 detects the stack surface and then lowers during printing.

When a cassette-media stack surface sensors does not detect the stack surface within a specified time period after the lifter motor starts rotating, the DC controller determines a lifter motor failure and notifies the formatter

Cassette multiple-feed prevention

In the cassette, a separation roller prevents multiple sheets of paper from entering the paper path. The cassette pickup roller drives the separation roller through a sheet of paper.

The rotation of the cassette feed roller through the sheet drives the cassette separation roller. Because it is equipped with a torque limiter, only one sheet is fed into the product.

ENWW Pickup, feed, and delivery system 43