The roll paper input system
Functionality
This system keeps the roll in place and ensures controlled rotation.
It contains the rewinder, which rewinds the paper for paper ejection, and provides an opposite tension to the
paper advance for better paper control.
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The Left Support encloses the Rewinder Motor and Encoder, containing a set of gears that transmit the
Rewinder motion to the spindle. There is a V-shaped spring to load and x the spindle in position.
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The Right Support holds the spindle in position to rotate over passive rollers. The right support also
contains the damper for the roll cover opening movement control (the internal dampers perform a
braking action preventing sudden movement during the opening operation).
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The spindle is designed to hold the paper rolls, and receive the motion from the rewinder gear in the Left
Support. It consists of a central bar and two hubs; the right hub is xed to determine the right-side
loading position of the paper, and the moveable left hub adjusts to the width of the paper.
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The Roll Cover shields the roll from dust.
NOTE: The Roll Cover is a passive part, with no sensor: the printer does not know its status.
Electronics
The Rewinder Motor and Encoder system are directly controlled by the Main PCA.
22 Chapter 1 Printer fundamentals ENWW
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