Patent ID: 8967891
Filing Date: 2015-03-03
Classification: B65H

Abstract:
1. A printing apparatus comprising: a roll body motor that drives a shaft of a roll body so as to feed a medium that is wound around the roll body; a paper feed motor that drives a transport roller which transports the medium fed from the roll body; and a control section which supplies electric power to the roll body motor for rotating the roll body and to the paper feed motor for drawing the medium from the roll body, wherein the control section supplies an assistance electric power to the roll body motor after applying electric power to the paper feed motor and at a time corresponding to a start of a feeding of the medium, the assistance electric power being in inverse proportion to a diameter of the medium wound around the roll body, and wherein the control section removes the assistance electric power when the roll body starts rotating, and wherein the assistance electric power includes a first assistance power that assists the driving of the roll body motor and does not depend on the diameter of the medium that is wound around the roll body and second assistance power that assists the driving of the roll body motor and is calculated by the control section separately from the first assistance power in accordance with the diameter of the roll body.