Abstract: To control the cut register of a web in a web-fed rotary press and to control the web tension decoupled from the control of the cut register, a specific item of image information or measuring marks of the printed web are registered by at least one sensor and the web tension is registered by at least one further sensor. The deviation of the position of the printed image with respect to its intended position, based on the location and time of the cut, is determined from the item of image information and is therefore available as actual values and supplied to a control device. The cut register error and the web tension can be influenced in a manner decoupled from each other.

Abstract: To control the cutting register of a web in a web-fed rotary press and to control the tension in a web section, in a manner decoupled from each another, at least one partial cutting register error is controlled at least one web tension is controlled. The press has controlled driven clamping points 0 to n, wherein j+q manipulated variables are used to influence j partial cutting register errors and q web tensions. Circumferential speeds and/or angular positions of clamping points are used as manipulated variables and the partial register error and the web tension in each case are located in the same or in different web sections.

Abstract: To control the cutting register of a web in a web-fed rotary press with little expenditure, a specific item of image information or a measuring mark of a printed web is registered by at least one sensor. The sensor generates a registration signal which is supplied to a control device. The registration of the image information or measuring marks is carried out immediately before or on a knife cylinder. A cutting register error is determined from the registration information and the position of the knife cylinder is influenced to correct the determined cutting register error.