Method for calibrating a web-cutter having a chip-out cutter module

A method for determining a displacement distance of a web in a web cutter from a reference point to a blade for cutting the web into sheets at a desired chip-out position when the web is placed for movement on a paper plane, said method comprising:

• providing a sensor at the reference point in relationship to the paper plane, wherein the sensor is operable in a first state and a second state;
• advancing the web past the blade so as to allow the blade to cut the web for providing a web edge;
• moving the web edge over the sensor in order to cause the sensor to change between the first and second states;
• obtaining at least one position of the web edge when the sensor is caused to change the state by the web edge movement;
• determining the displacement distance based on said at least one position in relation to a position of the web edge where the web is cut by the blade,
• wherein said at least one position comprises a plurality of positions of the web edge in relation to the position where the web is cut by the blade, and wherein said moving comprising a back-and-forth movement so as to cause the sensor to change the state by the web edge a number of times at said plurality of positions, and said determining comprising taking an average of said plurality of positions.