Patent ID: 9623687
Date: 2017-04-18
CPC Classifications: B41J

Claim:
1. A roll paper conveyance control method of a roll paper conveyance device having a conveyance mechanism for conveying media delivered from a roll, and a supply motor for rotating the roll, comprising: driving the supply motor to rewind the media onto the roll both as part of a rewind operation and to set roller to a target position; and detecting movement of a movable member, the movable member includes the roller that is configured for contacting the media and a lever attached to the roller, wherein the movable member is configured to move according to variation in tension on the media, while the supply motor is driven in the rewind operation, wherein, the supply motor is driven by PID control based on a positional deviation between the position of the roller and a target position, after the movement of the movable member is detected, and the position deviation is calculated based on the detected movement of the movable member.