Spinning machine

A spinning machine provided with a plurality of spinning spindles and having a yarn treating carrier provided with a yarn piecing mechanism and a yarn package doffing mechanism therein, movable along a rail provided on a frame of a spinning machine so as at least to stop at a predetermined spindle for carrying out a yarn piecing operation and a yarn package doffing operation, wherein each of said spindles has a yarn treating carrier detecting means for detecting a position of said yarn treating carrier at each spindle portion, and at least three operational device means each for determining a current position of said yarn treating carrier and operationally connected through said yarn treating carrier detecting means to determine a direction of movement of said yarn treating carrier with respect to said detecting means, said three operational device means being disposed in series on a side surface of said yarn treating carrier opposite to a row of the detecting means on the spinning frame whereby said yarn treating carrier is controlled so as to perform at least one of a forward moving operation, a decelerating operation, and a stopping operation in response to a yarn treatment signal and a detection signal of a position of said yarn treating carrier, each of which being output from each of said spindles.