Method and apparatus for controlling a drafting unit

摘要

A method and apparatus for controlling a drafting unit for textile slivers. The driving apparatus for the drafting unit is controlled by a main control and at least one auxiliary control. The drafting unit includes an upstream measuring element and a downstream measuring element which deliver measured signals to a central computer unit. A signal representing the inlet sliver cross-section is determined by means of an identification field parameter and by using the downstream measured signal. The identification field parameter is continuously adjusted during operation. A threshold switch is used to control the compensation for irregularities in the incoming sliver.