Method for producing coreless roll products

A method of controlling a converting line, wherein the converting line includes a rewinding machine and a control system of the converting line, the method comprising:

• winding a log of convolutely wound web material in the rewinding machine during a wind cycle;
• determining a diameter of the log of convolutely wound web material wound in the rewinding machine at a plurality of time points during a time period of the winding cycle;
• measuring a post-winding log diameter of the log at a position in the converting line downstream of the rewinding machine:
• determining a caliper of the web material of the log of convolutely wound web material at corresponding time points during the time period of the winding cycle;
• and
• enabling the control system to generate a signal to change an operating condition of the converting line based upon:
• (a) at least one of (i) a diameter determination at a time point during the time period of the wind cycle, (ii) a caliper determination at a time point during the time period of the wind cycle, (iii) a wound web amount determination at a time point during the time period of the wind cycle, and (iv) a tension determination at a time point during the time period of the wind cycle;
• and (b) the post-winding log diameter.