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); S a (t), S e (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); SK a (t), SK e (t)) is generated in that a correction value (K 0 , K 1 , K 2 ; K a , K e ) is added to the measuring signal (S(t); S a (t), S e (t)), and in which the determination of the correction value (K 0 , K 1 , K 2 ; K a , K e ) 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 (K 0 , K 1 , K 2 ; K a , K e ) is calculated in that the empty measuring value obtained in this manner (SL 0 , SL 1 , SL 2 ) is subtracted from a theoretical value (SL Soll ) of the measuring signal (S(t); S a (t), S e (t)) which value is predefined for an empty measuring.

1 . A method 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); S a (t), S e (t)) is generated that represents the length-specific mass (M) of the fiber structure (FV) located in the measuring area ( 26 ,  26 ′, 33 ), characterized in that a corrected measuring signal (SK(t); SK e (t), SK a (t)) is generated in that a correction value (K 0 , K 1 , K 2 ; K a , K e ) is added to the measuring signal (S(t); S a (t), S e (t)) and that the determination of the correction value (K 0 , K 1 , K 2 ; K a , K e ) 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 (K 0 , K 1 , K 2 ; K a , K e ) is calculated in that the empty measuring value obtained in this manner (SL 0 , SL 1 , SL 2 ) is subtracted from a theoretical value (SL soll ) of the measuring signal (S(t); S a (t), S e (t)) which value is predefined for an empty measuring.    
   
   
       2 - 39 . (canceled)