Method of directly determining setting values for the application point of regulation in a regulated draw frame

摘要

A method of directly determining setting values for an application point of regulation in a draw unit for drafting sliver, includes the following steps: obtaining a plurality of measured values of a quality-characterizing magnitude, such as a CV value, of the drafted sliver portion; utilizing the measured values for formulating a function having a minimum constituting an optimal application point of regulation for controlling the draw unit; determining the optimal application point of regulation in a pre-operational run of the draw unit; obtaining several measured values of a quality-characterizing magnitude based on an un-drafted sliver portion and determining the function between the quality-characterizing magnitudes and application points of regulation from measured values at the un-drafted sliver portion and at the drafted sliver portion.