Abstract: A method of controlling a converting line having a rewinder, accumulator, and downstream equipment includes: providing upper and lower target limits for the accumulator level; determining the slowest maximum speed of the downstream equipment; determining the fastest minimum speed of the downstream equipment; monitoring the speed of the rewinder and the actual level of the accumulator; generating a master speed reference value to control the downstream equipment which: (i) corresponds to said slowest maximum speed of the downstream equipment if the actual accumulator level is greater than the upper target limit; or (ii) corresponds to the fastest minimum speed of the downstream equipment if the actual accumulator level is less than the lower target limit; or (iii) is based on the actual production speed of the rewinder if the actual accumulator level is less than the upper target limit and greater than the lower target limit for the accumulator.

Abstract: In a production operation for producing rolls of tissue or towel from a parent roll including a converting line provided with a rewinder, an accumulator and downstream processing equipment, a method of controlling the converting line includes: (a) providing an upper target limit for the inventory level of the accumulator; (b) providing a lower target limit for the inventory level of the accumulator; (c) determining the slowest maximum speed of the downstream equipment; (d) determining the fastest minimum speed of the downstream equipment; (e) monitoring the average production speed of the rewinder; (f) monitoring the actual inventory level of the accumulator; (g) generating a master speed reference value which: (i) corresponds to said slowest maximum speed of the downstream equipment if the actual inventory level of said accumulator is greater than about the upper target limit for the inventory level of the accumulator; or (ii) corresponds to the fastest minimum speed of the downstream equipment if the actual