PRINTER MEDIA FEED ENCODER APPARATUS AND METHOD

摘要

A printer with a media feed apparatus has a media tray with a surface for supporting a media stack. A wave drive mechanism has a pair of wheels, a belt looped around said wheels, and a plurality of freewheeling rollers. Each one of the freewheeling rollers has an axis attached to and moving wit the belt. At least one of the plurality of freewheeling rollers makes contact wit the top sheet in the tray while the belt moves the axis in a feed direction to shift the top sheet in the feed direction, A controller controls a bias force of the wave drive mechanism against the top sheet during the time that the wave drive mechanism moves the sheet.