23 or 24 the illustration according to fig2 shows the improvement in the register regulation as a result of decoupling with reference to the example of a machine startup the effect of the decoupling increases with the number of printing units and web length this means that the positive effect of the invention is more noticeable in the case of a large number of printing units and a long printing press the illustration according to fig2 shows the speed with and without decoupling in the first diagram wherein the register errors at various subsequent printing units are shown in each case in the subsequent diagrams it is evident from the illustration that the error increases with the increasing number of printing units wherein the error can be significantly reduced by means of the inventive decoupling and the register error estimator this is shown particularly clearly in the case of the printing unit g 4 in this case the printing units g 2 and g 3 are located before the printing unit g 4 with regard to the direction of movement of a printing material the illustration according to fig3 shows a manual adjustment of the register of a printing unit in this case the register errors for the various printing units g 2 g 3 and g 4 are shown again in the diagrams furthermore fig3 shows that the.