Method and apparatus for the drafting of fiber sliver in a regulating draw frame for fiber material for the direct determination of setting values for the promoter use point

摘要

A method for the drafting of fiber sliver in a regulating draw frame for fiber material for the direct determination of setting values for the promoter use point at which the control of the adjustable distance in the distortion of fiber sliver has at least one pilot control, in order to change the drawing of the fiber sliver, wherein with the aid of the drawn fiber sliver a plurality of measured values of a quality characteristic quantity, such as cv - value, and be used for determining a function, the minimum an optimum promoter use point for the control of the distance is obtained and the optimized adjusting use point in a preoperational test - or adjustable running of the distance is determined, characterized in that on the drawn fiber sliver a plurality of measured values of at least two quality characteristic quantities, such as, cv - value, are sensed, in relation to the promoter use point mutually corresponding measured values of the quality characteristic variables at the fiber sliver to a quality score and be combined with the aid of a plurality of quality index values a function is determined whose minimum the optimum promoter use point.