| 主权项 |
1. In an image forming apparatus having a media input tray, a media type sensor mounted adjacent a media storage location in the media input tray, a media dam having a media contact surface having an opening therethrough, a separator roll pivotally mounted in a separator roll positioner attached to the media dam, the separator roll positioner used to angularly raise and lower a portion of the separator roll through the opening in the media contact surface to adjust a radial height of the separator roll with respect to the media contact surface, a media feed system for feeding media from the media storage location in a media process direction into the media contact surface and into a media path, a drive source operably coupled to the media feed system and to the separator roll for axially rotating the separator roll in a direction opposite the media process direction, the separator roll positioner operably coupled to a roll positioner motor, a controller in operable communication with a memory, the media type sensor, the drive source and the roll positioner motor, a method for adjusting separation forces applied to media being fed from the media input tray, the method comprising:
sensing a type of media in the media storage location; determining the type of media sensed; based upon the determined type of media, retrieving from the memory a predetermined initial position of the radial height of the separator roll with respect to the media contact surface; driving the roll positioner motor to adjust the separator roll positioner to angularly rotate the separator roll so that the radial height thereof in the opening of the media contact surface is at the initial position; and driving the drive source to actuate the media feed system to feed a sheet of media in the media process direction and to axially rotate the separator roll in a direction counter to the media process direction. |
