Patent ID: 7195239
Filing Date: 2007-03-27
Classification: B41J

Abstract:
1. A paper feed controller comprising: a paper feed unit configured to feed sheets; an encoder unit configured to output two pulse signals periodically by differing their phases with each other in response to a driving of the paper feed unit; a control unit controlling the driving of the paper feed unit based on the pulse signals; an acquisition unit acquiring a driving velocity of the paper feed unit before the paper feed unit stops driving; a determination unit determining the edge of either one of the two pulse signals output by the encoder unit and a timing to execute stop processing after occurrence of the edge based on the volume of the driving and the driving velocity of the paper feed unit; and a judging unit judging, following the occurrence of the edge of the pulse signal determined by the determination unit, whether the edge of another pulse signal output by the encoder unit occurred, wherein the control unit executes the stop processing to stop the drive of the paper feed unit based on the timing determined by the determination unit, and also executes the stop processing when the judging unit judges that the edge of another pulse signal occurred before the timing.