Spinning-mill preparing machine with a control apparatus

Abstract

A method is suggested for operating a spinning-mill preparing machine (1) with a control apparatus (20), especially a draw frame, card or combing machine, in which a running fiber structure (FV) is conducted through a measuring area (26, 26′,33) of a measuring apparatus (25, 25′, 32) and a measuring signal (S(t); Sa(t), Se(t)) is generated that represents the length-specific mass (M) of the fiber structure (FV) located in the measuring area (26, 26′,33), in which a corrected measuring signal (SK(t); SKa(t), SKe(t)) is generated in that a correction value (K0, K1, K2; Ka, Ke) is added to the measuring signal (S(t); Sa(t), Se(t)), and in which the determination of the correction value (K0, K1, K2; Ka, Ke) takes place by the following steps controlled by the control apparatus (20) of the spinning-mill preparing machine (1): The fiber structure (FV) is removed from the measuring area (26, 26′,33) by pneumatic and/or mechanical means (27, 13,14; 28), Then, an empty measuring is performed, and The correction value (K0, K1, K2; Ka, Ke) is calculated in that the empty measuring value obtained in this manner (SL0, SL1, SL2) is subtracted from a theoretical value (SLSoll) of the measuring signal (S(t); Sa(t), Se(t)) which value is predefined for an empty measuring.

Dependencies are inferred from the claim text.