| 摘要 |
A sheet feeding method includes supporting a media stack on an elevator, initiating operation of a pick roll in conjunction with a top most sheet, sensing whether or not the pick roll is operating in conjunction with the top most sheet, and moving the elevator, in response to the pick roll not operating in conjunction with the top most sheet, to overcome occurrence of a media handling failure mode between the pick roll and the top most sheet. The elevator is lowered, in response to the pick roll rotating but the top most sheet not arriving at a sheet arrival sensor, to increase a normal force imposed on the top most sheet to overcome the occurrence of a ‘fails to feed’ failure mode. The elevator is raised, in response to the pick roll not rotating, to decrease the normal force imposed on the top most sheet to overcome the occurrence of a ‘pick roll stall’ failure mode. |
