Open-end spinning machine and a method of restarting the same

Abstract

Disclosed is an open-end spinning machine and a method of restarting the same. The machine comprises: feed rollers, for supplying fibers to a combing roller so as to comb the fibers; a spinning rotor, for collecting the combed fibers into a yarn and for twisting the yarn, connected to a power source via an endless driving belt; a pair of draw off rollers, for withdrawing the yarn from the spinning rotor, connected to a brake and to a main power source via a clutch; a traverse guide, for traversing the withdrawn yarn along a bobbin supported by a pair of cradle arms, connected to a brake and to the main power source via a clutch; a winding drum, for frictionally driving the bobbin to wind the yarn around the bobbin and form a conical cheese, connected to a brake and to the draw off rollers via gear trains, and; a controlling device, for controlling the brakes and clutches according to a predetermined program, by which, on the occasion of stopping said machine, the traverse guide is stopped at a predetermined position before both the draw off rollers and the winding drum are stopped and, on the occasion of restarting said machine, the traverse of the traverse guide is started toward the smaller diameter portion of the conical cheese, when a pieced joint formed between an end of the yarn and a newly spun yarn reaches a contacting line formed between the pair of draw off rollers. By utilizing this machine and method, the number of yarn breakages occurring during the starting operation is decreased.