A method in connection with a Faserbahnmaschinenwickler

wound method in connection with a winding unit of a fibrous web, in which method the fibrous web (W) and / or unwound and the winding of a fiber web (11, 21) being wound, affecting and / or forming during the winding characteristic variable by means of at least is measured, characterized in that in the method the measurement results for determining a sudden change, in the periphery of the fiber web roll (11; 21); a measuring sensor (25 13) occurs in the machine direction for detecting and identifying pulse-like winding defects for defining and controlling the inner quality and structure of the fiber web roll (11; 21) to be processed.