Sewing machine controls tensile strength of thread such that tensile strength during sewing start is higher than tensile strength at the time of sewing after thread support releases thread, until thread is clamped

摘要

A thread support (60) releases the clamped edge of the thread inserted into a needle (52), after predetermined number of stitches. A tension controller controls tensile strength of the thread, such that the tensile strength during sewing start is higher than the tensile strength at the time of sewing after the support releases the thread, until the thread support clamps the thread.