Sewing machine
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United States of America Patent
Stats
-
Sep 8, 2020
Grant Date -
Dec 6, 2018
app pub date -
May 31, 2018
filing date -
Jun 1, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A sewing machine of the present embodiment comprises a movement amount detector which detects a movement amount of fabric, a sewing machine motor serving as a rotary drive source of an upper shaft which applies vertical movement to a needle bar, a shaft angle detector which detects a shaft angle of an output shaft of the upper shaft or the sewing machine motor, and a controller which controls the sewing machine motor based on the detection of the movement amount detector and performs controls of maintaining a constant stitch length. The controller performs controls of maintaining the constant stitch length, by a movement amount of the fabric detected by the movement amount detector in a shaft angle section where a sewing needle is not stuck into a cloth, based on the detection by the shaft angle detector.
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Family
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