METHOD AND APPARATUS FOR ROTARY PRINTING, AND METHOD OF IMAGE CONVERSION

摘要

A rotary printer comprises a thermal print head (11) for printing in the principal feed direction or a radial direction of a disk print medium (M); a stepping motor (15) for rotating the disk print medium in the secondary feed direction or a circumferential direction of the disk print medium (M); a CPU (61) for convert Cartesian-coordinate image data supplied by an external host device into the rotating coordinate image data composed of a number of pixels arranged in the principal and secondary feed directions of the disk print medium. This printer prints a Cartesian-coordinate image on a disk medium without distortion.