| 摘要 |
PROBLEM TO BE SOLVED: To provide a take-up device capable of suppressing generation of defect during taking up, even when taking-up length of a web is significantly varied. ! SOLUTION: A control device outputs an operation signal to a second drive motor so that take-up tension is controlled by a tension function T=f(x). The control device outputs the operation signal to the second drive motor, so that f(Lmin)>g(Lmin) and f(Lmax)<g(L) are satisfied, when a minimum value of variation of taking-up length of the web is Lmin and a maximum value of variation of taking-up length of the web is Lmax, and the taking-up tension force obtained by calculating so that frictional force becomes almost equal to critical frictional force, and stress in a tangential direction becomes almost equal to zero is tension force function Ta=g(x), based on a target function in which at least the stress in the tangential direction, the frictional force and the critical frictional force are parameters, and a limitation function in whic |
