... Function: Length setting auto stop, line speed variable speed control. 2, Rewinding Tension: Auto tension control by single motor and link with PLC, ... unwinder system including unwinder, web-guiding device, tension control, intermediate platform.4, The unwinding arms movement on ... , web-guiding travel range: ±75mm8, Tension control: constant tension control with 200N/M air friction brake, PLC taper ...