Abstract: A method for controlling the web tension of a product web in a web processing machine includes reducing the effects of the web tension control on the web stretch before an impending change in at least one parameter influencing the web tension.

Abstract: A method for operating a winding device of a processing machine for processing a material web is disclosed. A winding device is provided for winding or unwinding the material web. The winding device is operated to specify a web tension, wherein a switch occurs from a first web tension specification procedure to a second web tension specification procedure during the processing of the material web.

Abstract: A method is disclosed for controlling a control variable for a processing machine, which has driven rollers for transporting and/or for processing a material web, of which rollers at least one is not part of a clamping point. A first control element is pilot-operated based on a second control member according to a control value in order to adjust the at least one driven roller that is not part of a clamping point.

Abstract: A method for actuating at least one digital printing unit of a digital printing press, includes at least one driven transport device and an associated movement control device. The at least one digital printing unit is connected to the movement control device via a data connection. Values of variables characterizing the transport are transmitted digitally from the movement control device via the data connection to the at least one digital printing unit, so as to be used for controlling the printing process in the at least one digital printing unit.

Abstract: A method for controlling a printing operation includes detecting at least one position and/or an extent of a register mark located on a printing material by means of a register mark sensor, and using the detected at least one position and/or the extent of the register mark for register control. The method further includes acquiring at least one item of color information by means of the same register mark sensor during the printing operation, carrying out color monitoring with at least the at least one item of color information, and determining a color deviation with respect to a reference value. Furthermore, the method includes defining a threshold value for the color deviation, and outputting a warning and/or automatically making a change from good to poor products when the threshold value for the color deviation is exceeded.

Abstract: A method is disclosed for web tension setting in a processing machine for processing a material web, in particular a shaftless printing press. In order to set the web tension in a first web tension section with a length L which is delimited upstream by a first clamping point and downstream by a second clamping point, the first clamping point is loaded with a first manipulated variable which is produced using a first element with a first transfer function G1(s) (G3), and the second clamping point is loaded with a second manipulated variable which is produced using a second element with a second transfer function G2(s) (G4), wherein c1G1(s)=?c2G2(s). Thus, it is possible to keep the speed constant even during the regulation at a fixed or variable point x within the web tension section, wherein x=|c1/(c1+c2)|L lies behind the first clamping point.

Abstract: With a method for synchronization in a communication system that includes a central participant and at least one further participant, at least one of the further participants being synchronized with the central participant, and, to this end, a telegram with synchronization information being transmitted by the central participant to the at least one further participant, particularly efficient synchronization of the at least one participant with the central participant results due to the fact that the telegram is a data telegram.

Abstract: In a method for operating a network having a primary station and at least two secondary stations, the primary station communicates with the secondary stations. The secondary stations communicate with one another via cross communication in the form of telegrams which are generated in the context of communications cycles.

Abstract: A method for operating a processing roller of a processing machine having a circumferential length and comprising a tool having a tool length extending in the circumferential direction is disclosed. A processing length extending in the circumferential direction is defined, along which the tool is engaged with the material to be processed during processing. A compensation length in the circumferential direction is further prescribed, along which a compensation motion of the processing roller is performed, wherein the tangential velocity of the processing roller is negative at least at times. The compensation length is determined using the circumferential length, the processing length, and the tool length.

Abstract: A method of setting web tensioning in a processing machine for processing a material web, in particular in a shaftless printing machine, wherein, for the purpose of setting the web tensioning in a first web-tensioning portion, which is bounded upstream by a first clamping location and downstream by a second clamping location, the first clamping location is given a control command, and at least one clamping location which is located upstream of the first clamping location, as seen over the course of the web tensioning, and at least one clamping location which is located downstream of the second clamping location, as seen over the course of the web tensioning, are precontrolled in dependence on the first control command, where the second clamping location is not adjusted.

Abstract: In a method for time synchronization of subscribers connected via a cyclically operating communication system, an item of time information is transmitted to the subscribers to be synchronized. It is provided to transmit an item of absolute time information simultaneously to all subscribers to be synchronized, for initialization, and to implement a synchronization by recalculating the local times of the subscribes at least following one or a plurality of cycles having a known cycle time. The item of absolute time information and the known cycle times are used for the recalculation.

Abstract: A method is disclosed for controlling at least one machining device which is coupled to a machine tool by means of an encoder signal, the machine tool having at least one motion control device. In order to improve the accuracy of the encoder connection, at least one additional variable which characterizes the transport is digitally transmitted from the motion control device to the at least one machining device and is used to correct the encoder signal.

Abstract: A method for axis correction in a processing machine, in particular a shaftless printing machine, has at least one axis for processing and/or transporting a material, at least one detection device for detecting a processing parameter and at least one controller device for calculating a controller output variable for axis correction of the at least one axis using the detected processing parameter. The method is implemented iteratively, with the result that feedforward control output values for the feedforward control of the axis correction are determined during an (n+1)-th change in rotation speed of the at least one axis using observation of the controller output variable and/or the processing parameter during an n-th change in rotation speed of the at least one axis.

Abstract: A method for controlling a processing machine with driven axes, in particular a printing press, wherein a radius of at least one axis is used to automatically determine a control limiting value.

Abstract: A method for automatic axis correction in a processing machine for processing a product web, wherein the product web is subdividable into at least two web tension sections, a web tension section being delimited by two clamping points formed as transport or processing devices. An axis deviation of at least one clamping point formed as a processing device is determined. The at least one clamping point is then opened, the axis thereof is automatically corrected on the basis of the axis deviation determined and the clamping point is closed after the axis correction.

Abstract: A method is disclosed for automatically determining at least one controller parameter of a dancer position control element in a processing machine comprising a dancer, the dancer position of which is registered, wherein, on the basis of the registered dancer position, the rotational speed of a roll is predefined, wherein the at least one controller parameter is determined automatically as a function of a diameter of the roll.

Abstract: A method for the register correction of a processing machine for processing a continuous material, in particular a shaftless printing press, with which the continuous material is processed by at least two processing units with at least one compensator for adjusting the length of the continuous material in the continuous material section being provided upstream of each of the at least two processing units. In order to adjust the register of a first processing unit, the length of the continuous material of the continuous material section upstream of the first processing unit is adjusted by the compensator provided in this first continuous material section. To adjust the register of the first processing unit, the length of the continuous material of the continuous material section upstream of a second processing unit is also adjusted by the compensator provided in this second continuous material section. A related processing machine carries out the inventive method.

Abstract: In a method for calculating the diameter of a continuous-material reel on a roller, with which the roller is mounted on a swivel arm that is swivelable about a swiveling axis; the roller rotates at a changeable winding speed, and the continuous material is unwound from the roller and directed to a continuous-material machine, or it is removed from a continuous-material machine and wound onto the roller, the winding speed is set as a function of the web-conveyance speed, and the diameter of the continuous-material reel is calculated in a reel-control system; the winding speed is changed when the swivel arm on which the roller is mounted is swiveled about its swiveling axis during the winding motion; a correction value for correcting the change in winding speed is incorporated in the calculation of the diameter of the continuous-material reel, the correction value being determined within the reel-control system, and a related reel-control system is provided.

Abstract: A method for data transmission via data networks, in particular via ethernet-based data networks, having at least two participants; the data networks have at least one topological real-time field and one topological non-real-time field, and data telegrams sent via the data networks have at least one real-time part and at least one non-real-time part. By a coupling unit, data telegrams from the non-real-time field which arrive inside the real-time part are delayed and transmitted to the non-real-time part.

Abstract: The invention relates to modeling a control circuit (300) for a processing machine for processing a material web, particularly shaft-less printing machine, wherein at least one dead time (Tt,SENSOR, Tt,NET, Tt,SPS, T(v)R, T(v)D) is taken into consideration during modeling.