3.3 Paper Feed Section
3.3.1 Paper feed components
The paper feed components include an ASF incorporating a friction separation system
which uses a separation pad. Compared to previous ASF systems, it has a very strong
paper feed force.
It consists of the following parts: Paper feed roller and separation pad, pressure roller
and return corner, pressure plate, motor, and sensor.
The motor is a constant-current stepping motor. It drives the paper feed roller with 1-
2-phase driving. There is a sensor on the paper feed roller to detect the paper feed
roller's initial position.
The pressure roller and return corner prevent the paper that could not be completely
separated by the separation pad from proceeding to the paper transport section. The
pressure roller presses down the sheet of paper that is on the separation pad. It
prevents multiple sheets from being transported. The paper therefore has a back
tension (counteracting force against the feed roller's pulling force on the paper). Also,
the return corner is for returning the paper remaining on the separation pad. The
timing for returning the paper changes depending on the paper type and length
selected with the printer driver.
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Part 3: Technical Reference
