System and method for controlling the width of web material

摘要

A system and method for controlling the width of a web material supplied to a machine by adjusting the tension of the web material. An operator defines a target web width via an input device. The input device generates a reference signal representative of the target web width. A sensing device senses the width of the web material supplied to the machine and generate feedback signal representative of the sensed width. A control circuit compares the feedback and reference signals and generates a tensioning signal as a function of the comparison. A tensioning device is responsive to tensioning signal for adjusting web tension.