Method for Operating a Winding Device

Abstract

A method for operating a winding device of a processing machine for processing a material web is disclosed. A winding device is provided for winding or unwinding the material web. The winding device is operated to specify a web tension, wherein a switch occurs from a first web tension specification procedure to a second web tension specification procedure during the processing of the material web.

1 . A method for operating a winding device of a processing machine for processing a material web, comprising:
 (a) processing the web material so as to wind up or unwind the material web with a winding device,   (b) operating the winding device so as to specify a web tension during the processing step,   (c) during the processing step, switching from a first web tension specification method to a second web tension specification method.   
     
     
         2 . The method as claimed in  claim 1 , wherein the first and/or second web tension specification method is selected from the group comprising control and setting of a dancer position, of a rotational speed and of a drive torque. 
     
     
         3 . The method as claimed in  claim 1 , further comprising:
 (d) carrying out a flying reel change, and   wherein each of steps (a), (b), and (c) are carried out before step (d).   
     
     
         4 . The method as claimed in  claim 3 , wherein:
 the second tension specification method is a a dancer position specification method, and   step (c) is carried out before step (d).   
     
     
         5 . The method as claimed in  claim 3 , wherein:
 the second tension specification method is a dancer position specification method, and   step (c) is carried out after step (d).   
     
     
         6 . The method as claimed in  claim 5 , wherein the dancer is fixed before step (c). 
     
     
         7 . The method as claimed in  claim 1 , further comprising:
 (d) carrying out a change in the material, and   wherein each of steps (a), (b), and (c) are carried out before step (d).   
     
     
         8 . The method as claimed in  claim 7 , wherein:
 the second tension specification method is a rotational speed specification method, and   step (c) is carried out during a change to a material with a lower modulus of elasticity.   
     
     
         9 . The method as claimed in  claim 7 , wherein:
 the second tension specification method is a drive torque specification method, and   step (c) is carried out during a change to a material with a greater modulus of elasticity.   
     
     
         10 . A computing unit configured to carry out a method for operating a winding device of a processing machine for processing a material web, comprising:
 (a) processing the web material so as to wind up or unwind the material web with a winding device,   (b) operating the winding device so as to specify a web tension during the processing step, and   (c) during the processing step, switching from a first web tension specification method to a second web tension specification method.   
     
     
         11 . The method as claimed in  claim 1 , further comprising:
 (d) carrying out—a flying reel change, and   wherein each of steps (a), (b), and (c) are carried out after step (d).   
     
     
         12 . The method as claimed in  claim 1 , further comprising:
 (d) carrying out a change in the material, and   wherein each of steps (a), (b), and (c) are carried out after step (d).