Roll machine and process for operating the same

摘要

A roll machine is provided. A plurality of rolls are disposed in a stack to define a plurality of nips therebetween adapted to treat a material web. At least two of the plurality of rolls are driven rolls. A drive control commonly controls the driven rolls. The drive control varies a driving torque distribution of the driven rolls over time. A method for operating the above roll machine is also provided, where the method includes changing a driving torque distribution of said driven rolls.