Measurement of thread velocity in sewing machines

To compete with garment manufacturers worldwide, it is essential that the sewing industry automates. In all cases of automation, parameter signal acquisition is an essential feature and a prerequisite to controlling the sewing machine performance. The advancement of practical, automated, high speed sewing machines capable of optimising sewn seam quality, will greatly benefit the garment industry. This paper explores the factors relating to the use of ultrasonic doppler shift techniques in the measurement of sewing machine thread run in rate.<
>