Method for providing a compensation sheet for a pressing station and method for setting a cardboard processing machine

A method for setting up a cardboard processing machine, the method comprising:

• providing several compensation sheets to be used in the cardboard processing machine, each compensation sheet being specific for an operating pressure range used in a pressing station of the cardboard processing machine,
• choosing an operating pressure for operating the pressing station,
• selecting a compensation sheet based on the operating pressure, and
• superimposing the selected compensation sheet with an upper platen or a lower platen in the pressing station,
• wherein the compensation sheets are uniquely configured for a specific, individual cardboard processing machine.

A system designed to compensate an unevenness of an upper platen with respect to a lower platen of a pressing station during a pressing process, the system being uniquely configured for a specific, individual pressing station unit, the system comprising:

• a set of at least a first and a second compensation sheet, wherein each compensation sheet has zones with different thicknesses according to a compensation layout that establishes the sheet's thickness based on its position across the surface of the compensation sheet,
• wherein the first sheet is designed according to a first compensation layout that compensates for the unevenness of the distance between the upper platen and the lower platen of the unit when the platens are pressed together with a first operating pressure,
• wherein the second sheet is designed according to a second compensation layout that compensates for the unevenness of the distance between the upper platen and the lower platen of the unit when the platens are pressed together with a second operating pressure that differs from the first operating pressure, and
• wherein the first and second compensations layouts compensate for the unevenness over at least 10% of the operational surface of the upper platen;
• meaning that the set of locations within the sheet's surface that have a compensating thickness cover at least 10% or the operational surface of the upper platen.