Compensation of disturbances in the web force caused by a non-circular running winder

摘要

In many plants of the steel-, paper-, printing-plastic-or textile industry the first section is an unwinder. But during storage and transport of the rolls, the rolls are often non-circular. If such a roll is unwinded, the radius is variable around the cirumference. Therefore a changing web velocity is caused depending on the variable radius and big oscillations of the web forces are the consequence, if the winder speed is constant.