Sewing machine

摘要

A sewing machine to which a circular stitching device configured to anchor a sewing workpiece in a rotatable manner includes a feeding device, a sewing device, a processor, and a memory. The memory is configured to store computer-readable instructions that, when executed by the processor, cause the sewing machine to execute the steps of specifying a distance between an anchor position and a needle drop point, changing first feed amount data into second feed amount data based on the specified distance and a length of a stitch pattern, specifying an actual amount of movement of the sewing workpiece, and revising the second feed amount data for at least one stitch, among stitches of a plurality of iterations of the stitch pattern, that is not yet formed, based on a difference between the specified actual amount of movement and a planned feed amount indicated by the second feed amount data.

主权项

1. A sewing machine to which a circular stitching device is mountable, the circular stitching device being configured to anchor a sewing workpiece in a rotatable manner at an anchor position that is set apart from a needle drop point, which is a position where a sewing needle pierces the sewing workpiece, the sewing machine comprising:
a feeding device that is configured to feed the sewing workpiece in a specified feed direction; a sewing device that is configured to form a stitch in the sewing workpiece that is fed by the feeding device; a processor; and a memory that is configured to store computer-readable instructions that, when executed by the processor, cause the sewing machine to execute the steps of: specifying a distance between the anchor position and the needle drop point, changing first feed amount data into second feed amount data based on the specified distance and a length in the feed direction of a stitch pattern that includes stitches, the first feed amount data indicating a planned feed amount set in advance, the planned feed amount being a planned amount for the sewing workpiece to be fed by the feeding device in order for the stitches of the stitch pattern to be formed, the second feed amount data indicating the planned feed amount that makes a length of a circumference of a circle having a radius of the specified distance to be equal to a length in the feed direction of a plurality of iterations of the stitch pattern, specifying an actual amount of movement of the sewing workpiece that is fed by the feeding device based on the second feed amount data, and revising the second feed amount data for at least one stitch, among the stitches of the plurality of iterations of the stitch pattern, that is not yet formed, based on a difference between the specified actual amount of movement and the planned feed amount that is indicated by the second feed amount data.