METHOD FOR CONTROLLING THE YARN FEED OF AT LEAST ONE YARN FEEDER DEVICE AND TEXTILE MACHINE WITH A SYSTEM WITH AT LEAST ONE YARN FEEDER DEVICE

摘要

In a method for controlling the yarn delivery of at least one yarn feeding device (1) to a textile machine, a yarn (40) is withdrawn from a storage body (3) of the yarn feeding device (1) through the textile machine. The thread tension of the thread (40) is adjusted by a braking device with at least one brake body (8) in the thread path after the storage body (3) and with an adjusting device. In this case, at least one adjusting element of the adjusting device acts on the brake body or brake bodies (8), wherein the actuating element (s) are / are actuated by a brake signal. By means of a thread tension unit, the brake signal for regulating the thread tension is set to a reference value (Mref) whereby measured values (Mi) of the thread tension are determined by a tension measuring unit and a difference (Mdiff) between a measured value (Mi) and the reference value (Mref) is minimized becomes. To determine the zero point (M0) of the tension measuring unit, a brake release (BE) with at least one unloading cycle is carried out by a thread tension unit determining unit (70), wherein at each unloading cycle the brake signal is shifted from an initial value (Ia) to one Value (lmin), at which the brake body or bodies (8) are completely relieved, and changed back to the initial value (Ia). An offset value (m0) of a measuring device of the voltage measuring unit, which is measured at the value (Imin) of the brake signal during the last unloading cycle, is used to determine the zero point.