A method for controlling the cut register in a web-fed rotary press,
includes registering an actual value measurement of a position of cut
register marks on a printed material web by measuring positions of
printing cut register marks on the printed material web, using the
measured positions in control loops as actual values of positions of cuts
for cut register control, and correcting a first set value of a cut
register setting element assigned to the printing material web based on a
mathematical model for an error contribution of a proportion of the path
of the printing material web that is not registered by the actual value.