Patent ID: 9550646
Date: 2017-01-24
CPC Classifications: B41J,B65H

Claim:
1. A media conveyance control method of a media conveyance device having a conveyance mechanism that conveys a continuous medium delivered from a roll, and a media supply motor that rotates the roll, comprising: positioning a movable member that moves in response to a change in the tension on the medium between the roll and the conveyance mechanism; setting a target position and an error determination range separated from the target position in the movable range of the movable member; acquiring a positional deviation of the movable member from the target position continuously or intermittently while conveying the medium by the conveyance mechanism; controlling driving the media supply motor based on the positional deviation to set the movable member to the target position; measuring the time the movable member remains in the error determination range after the movable member enters the error determination range; and determining if an error occurred based on the measured time.