Lexmark W820 - Optra B/W Laser Printer Service Manual page 22

4025-Finisher
Drive for Punch Unit
The rotation of the Main Feed Motor drives the Main Drive Belt to transmit a driving force
to the Main Drive Gear. The rotation of the Main Drive Gear transmits a driving force to
the Feed Gear 1. The rotation of the Feed Gear 1 drives the Timing Belt 1, and driving the
Timing Belt 1 rotates the Regi Roll Gear. The driving force from the Regi Roll Gear is
transmitted to the Punch Gear 1 via the Punch Drive Belt. Then, the rotation of the Punch
Gear 1 transmits a driving force to the Punch Clutch via the Punch Gear 2. The rotation of
the Punch Clutch moves up and down the Punch Shaft in the Punch Unit to perform the
punching operation. The counterclockwise rotation of the Punch Motor moves up the
Punch Shaft, while the clockwise rotation moves down the shaft.
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Service Manual