Device to a regulating draw frame for fiber bands for determining of setting values for the preliminary draft

摘要

A method to a regulating draw frame for fiber bands for determining of setting values for the preliminary draft, wherein the ratio of the peripheral speeds of the means - to input under rollers of the drafting arrangement can be changed and on the basis of the drawn fiber sliver measured values of a quality characteristic size as a deviation in thickness to be absorbed, from which the band numbers deviations are derived, characterized in that a function between the measured values of the band numbers deviations and the preamplifier train values is determined, the measured values by means of two approximate (approximate) straight, and the point of intersection of the straight line for the adjustment of an optimal pre-drawing is used.