Method and equipment in connection with a paper machine or a paper web finishing apparatus

A method in connection with drawing a paper web through at least two operational groups each associated with a paper machine or a paper web finishing apparatus, said method comprising;

• measuring a variable representing runnability of the paper web, defining a moisture profile of the paper web substantially along the entire width of the paper web,
• defining minimum and maximum values for moisture on the basis of the moisture profile,
• defining a drawing window having lower and upper limits describing the allowable tension to be drawn on the paper web, the lower and upper limits of the drawing window being defined on the basis of the minimum and maximum values for moisture, and
• adjusting the speed difference between the operational groups on the basis of the measurement of said variable so that the paper web tension is within the range defined by the drawing window.

Equipment in connection with drawing a paper web through at least two operational groups each associated with a paper machine or a paper web finishing apparatus, said equipment comprising;

• at least one moisture measuring device for measuring a moisture profile of the paper web substantially along the entire width of the paper web,
• means for defining minimum and maximum values for moisture on the basis of the moisture profile,
• means for defining a drawing window having lower and upper limits describing the allowable tension to be drawn on the paper web, the lower and upper limits of the drawing window being arranged to be defined on the basis of the minimum and maximum values for moisture, and
• means for adjusting the speed difference between the operational groups on the basis of the moisture of the paper web so that the paper web tension is within the range defined by the drawing window.