A roll changer of a web-fed rotary printing press and method for controlling a reel changer

摘要

The present invention relates to a method for controlling a present invention overcomes the limitations of a web-fed rotary printing press, with a cascade control loop comprising a current controller (21) and one of the current regulation (21) rotational speed controller superimposed on (22) for the regulation of the rotational speed of a printing material reel (10) driving motor (14) and therefore to regulate the circumferential speed of the printing material reel (10) and the web speed of one of the printing material reel (10) printing material web to be unwound (12) and with a the cascade control loop comprising current regulation (21) and rotational speed controller (22) in the sense of a further cascade superimposed position control (29) for a on the unwinding web of printed material (12) acting in the dancer roll (16), wherein the dancer roll (16) serves to provide a defined web tension. According to the invention, of: a) in the case of a reel change to the synchronization of the circumferential speed of a new printing material reel to the circumferential speed of the printing material reel that the control of the position (29) of the dancer roll (16) is deactivated and for the formation of a desired value (28) of the current regulation (21) of an output variable (27) of the speed control (22) as a feedforward component of the differentiated desired value (24) is applied to the rotational speed controller (22); b) according to the reel change has been the control of the position (29) of the dancer roll (16) is activated and for the formation of the set value (28) of the current regulation (21) of the output variable (27) of the speed control (22) as a feedforward the ..