Printer and printing method

摘要

A printer includes a roll paper body driving mechanism that transports a medium by rotating a roll paper body on which the medium is wound, a first transport mechanism provided downstream of the roll paper body to transport the medium, a print head provided downstream of the first transport mechanism to carry out printing on the medium, a second transport mechanism provided between the roll paper body and the first transport mechanism to transport the medium, and a controller carries out control so that, in a range in which a velocity at which the first transport mechanism transports the media changes, the absolute value of a difference in an amount by which the medium is transported between transport mechanisms is larger between the roll paper body driving mechanism and the second transport mechanism than between the second transport mechanism and the first transport mechanism.

主权项

1. A printer, comprising:
a roll paper body driving mechanism configured to transport a medium in a transport direction by rotating a roll paper body on which the medium is wound in a roll shape, the roll paper body driving mechanism including a rotational holder that is configured to support the roll paper body; a roll paper body driver that drives the roll paper body driving mechanism; a first transport mechanism provided downstream of the rotational holder in the transport direction to transport the medium; a first driver that drives the first transport mechanism; a print head provided downstream of the first transport mechanism in the transport direction to carry out printing on the medium; a second transport mechanism provided between the rotational holder and the first transport mechanism to transport the medium; a second driver that drives the second transport mechanism; and a controller configured to control operations of the roll paper body driver, the first driver, and the second driver based on an amount of slack between the roll paper body driving mechanism and the second transport mechanism such that, in a timing at which a velocity at which the first transport mechanism transports the media changes, an absolute value of a difference between an amount by which the medium is transported by the roll paper body driving mechanism and an amount by which the medium is transported by the second transport mechanism being larger than an absolute value of a difference between an amount by which the medium is transported by the second transport mechanism and an amount by which the medium is transported by the first transport mechanism, the amount of slack indicating a slack amount of the medium slacking in a slacking direction relative to a hypothetical line that indicates a transport route where the medium is transported without slacking in the slacking direction between the roll paper body driving mechanism and the second transport mechanism, the slacking direction intersecting the transport direction.