Lexmark W820 - Optra B/W Laser Printer Service Manual page 34

Mechanical Drive Stapler Components
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Drive for Stacker Tray
The rotation of the worm gear in the Lift Up Motor supplies a driving force to each gear on
the Elevator Drive Unit via the Lift Up Gear 1. Then, the rotation of the Lift Up Gear 2
transmits a driving force to the Elevator Drive Gear. The driving force transmitted to the
Elevator Drive Gear rotates the Elevator Shaft. The rotation of the Elevator shaft transmits
a driving force to the Elevator Belt to elevate the Stacker Tray.
The rotation of the worm gear in the Lift Up Motor transmits a driving force to the Lift Up
Gear 3 via each gear on the Elevator Drive Unit. The rotation of the Lift Up Gear 3 rotates
the Liner Encoder.
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Service Manual
4025-Finisher
The Stapler Traverse Motor supplies a driving force to the Stapler Drive Pulley.
The Stapler Drive Pulley transmits the driving force from the Stapler Traverse Motor
to the Stapler Timing Belt.
The Stapler Timing Belt moves the Stapler Unit to the left and right by the belt drive.
The Stapler Swing Motor supplies a driving force to the Stapler Swing Gear 1.
The Stapler Swing Motor transmits the driving force transmitted from the Stapler
Swing Motor to the Stapler Swing Gear 2.
The Stapler Swing Gear 2 transmits the driving force transmitted from the Stapler
Swing Gear 1 to the Sector Gear in the Stapler Unit, to swing the unit.
The Stapler Swing HP Sensor detects the Stapler tilt angle when the Stapler Unit
performs the stapling.