Patent ID: 6905573

Claim:
A method for cleaning and maintaining a set of rolls of a paper machine or board machine, wherein the set of rolls is equipped with a soiling monitoring apparatus, and a controllable cleaning device, which is controlled by a control system, the method comprising the steps of: monitoring the surface of the web by a fault detection system, and delivering the detected information to the control system; detecting and localizing the soiled part of a roll by the soiling monitoring apparatus; and delivering information on the detection and location of soiling on the roils gathered by the soiling monitoring system to the control system of the cleaning device, and according to a control command of the control system, controlling the cleaning device to remove the detected soiling from the roll by spreading with liquid at least part of the width of the roll or web during the running of the machine at the same time as the web runs over the surface of said roll, and carrying away the spread liquid and possible extra substances with the web as the web runs over the roll.