Method and device for operating a workstation of a yarn balloon forming textile machine

Abstract

A method for operating a workstation ( 1 ) of a yarn balloon forming textile machine, wherein a yarn balloon (B) formed by a continuous yarn ( 5 ) circling a spindle ( 2 ) of the workstation ( 1 ) is scanned with a sensor means ( 33 ) at said workstation. Data (D) recorded by the sensor means ( 33 ), providing information about the current diameter of the yarn balloon (B) to be monitored, is transmitted to a control circuit ( 18 ), in that the control circuit ( 18 ) calculates the current actual diameter of the yarn balloon (B) by means of this data (D) and further known data, compares this with a stipulated target diameter of the yarn balloon (B), and in that the control circuit ( 18 ) ensures that the yarn balloon (B) has the stipulated target diameter with the aid of a means ( 6 ) switched into the yarn path of the yarn ( 5 ), for influencing the yarn tension.

What is claimed is: 
     
         1 . Method for operating a workstation ( 1 ) of a yarn balloon forming textile machine, wherein a yarn balloon (B) formed by a yarn ( 5 ) circulating a spindle ( 2 ) of the workstation ( 1 ) is scanned with a sensor means ( 33 ) at the workstation ( 1 );
 characterized in that   data (D) recorded by the sensor means ( 33 ), providing information about the current diameter of the yarn balloon (B) to be monitored, is transmitted to a control circuit ( 18 ),   the control circuit ( 18 ) calculates the current actual diameter of the yarn balloon (B) with the aid of this data (D) and further known data, compares these with a stipulated target diameter of the yarn balloon (B), and   the control circuit ( 18 ) ensures with a means ( 6 ) for influencing the yarn tension, switched in the yarn path of the yarn ( 5 ), that the yarn balloon (B) has the stipulated target diameter.   
     
     
         2 . Method according to  claim 1 , characterized in that the control circuit ( 18 ) controls the means ( 6 ) in such a way that the production speed of the workstation ( 1 ) of the yarn balloon forming textile machine always remains high and constant outside of the start and stop phases of the workstation ( 1 ). 
     
     
         3 . Method according to  claim 1 , characterized in that the control circuit ( 18 ) controls the means ( 6 ) in such a way that the yarn balloon (B) already has the desired target diameter during the start and stop phases of the workstation ( 1 ). 
     
     
         4 . Method according to  claim 1 ,  2  or  3 , characterized in that the control circuit ( 18 ) controls the means ( 6 ) in such a way that the target diameter of the yarn balloon (B) is limited during the start and stop phases of the workstation ( 1 ) in such a way that the distance to neighboring workstations ( 1 ) of the textile machine can be reduced. 
     
     
         5 . Device for carrying out the method described in  claim 1  and a multitude of workstations arranged next to each other, wherein each workstation ( 1 ) of the yarn balloon forming textile machine comprises a sensor means ( 33 ) for scanning the diameter of a yarn balloon (B), characterized in that the relevant sensor means ( 33 ) generates signals (i) depending on the actual diameter of the yarn balloon (B), has a control circuit ( 18 ) that evaluates the signals (i) of the sensor means ( 33 ), and is equipped with a means ( 6 ) connected to the control circuit ( 18 ) that enables the influencing of the yarn tension of a circulating yarn ( 5 ) forming the yarn balloon (B). 
     
     
         6 . Device according to  claim 5 , characterized in that the yarn balloon forming textile machine is a Two-for-one twisting or cabling machine. 
     
     
         7 . Device according to  claim 5 , characterized in that the yarn balloon forming textile machine is a ring spinning machine. 
     
     
         8 . Device according to  claim 6 , characterized in that the means ( 6 ) connected to the control circuit ( 18 ) is a yarn supply mechanism positioned in the yarn path of the yarn ( 5 ) before the yarn balloon (B). 
     
     
         9 . Device according to  claim 8 , characterized in that the means ( 6 ) is an outer yarn supply mechanism.