A method for computer-aided sheet running control in a sheet-fed printing machine includes, during a printing operation, using a measuring sensor to detect a printed sheet in the printing machine and using an activation sensor to initiate measuring performed by the measuring sensor by emitting an activation signal. The activation sensor is mechanically fixedly installed without adjustment, and temporal deviations of the activation signal are determined and compensated. A system for computer-aided sheet running control in a sheet-fed printing machine is also provided.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes a lead screw motor, a lead screw coupled to the lead screw motor, and a carriage coupled to the lead screw. The carriage includes two drive rollers, wherein each drive roller is coupled to a respective splined shaft coupled to a respective yoke, wherein the respective yoke is coupled to a drive pulley and a drive motor that is in a fixed position, wherein movement of the carriage causes the respective splined shaft of the two drive rollers to move guided by the respective yoke.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes a lead screw motor, a lead screw coupled to the lead screw motor, and a carriage coupled to the lead screw. The carriage includes two drive rollers, wherein each drive roller is coupled to a respective splined shaft coupled to a respective yoke, wherein the respective yoke is coupled to a drive pulley and a drive motor that is in a fixed position, wherein movement of the carriage causes the respective splined shaft of the two drive rollers to move guided by the respective yoke.

A thermal transfer printing machine with stationary support elements for supporting an article and a thermal transfer assembly vertically movable above the support elements, between a raised rest position and a lowered working position is disclosed. The machine has a surface heated transfer pad, supply and guide devices, a flexible printing ribbon which carries thermally transferable ink images, a position sensor providing electrical signals indicative of the vertical position of the transfer pad and a control unit with a learning phase, said control unit causes a descent run of the thermal transfer assembly, until the transfer pad engages with an article of a predetermined type. The position sensor detects and stores reference data characterizing descent run and the control unit initiates a subsequent descent run towards an article of the same type, comparing the reference data to the current descent run data, and stopping printing when an anomaly is discovered.

A thermal transfer printing machine with stationary support elements for supporting an article and a thermal transfer assembly vertically movable above the support elements, between a raised rest position and a lowered working position is disclosed. The machine has a surface heated transfer pad, supply and guide devices, a flexible printing ribbon which carries thermally transferable ink images, a position sensor providing electrical signals indicative of the vertical position of the transfer pad and a control unit with a learning phase, said control unit causes a descent run of the thermal transfer assembly, until the transfer pad engages with an article of a predetermined type. The position sensor detects and stores reference data characterizing descent run and the control unit initiates a subsequent descent run towards an article of the same type, comparing the reference data to the current descent run data, and stopping printing when an anomaly is discovered.

An example a media sensor device may comprise a light source positioned on a first side of a media pathway, a light path to receive a light from the light source and direct the light through a plurality of openings from the first side of the media pathway to a second side of the media pathway, and a light sensor on the second side of the media pathway to detect print media within the light path based on an intensity of light received from the light source, wherein a heated enclosure aligns the light sensor with the light path.

An example a media sensor device may comprise a light source positioned on a first side of a media pathway, a light path to receive a light from the light source and direct the light through a plurality of openings from the first side of the media pathway to a second side of the media pathway, and a light sensor on the second side of the media pathway to detect print media within the light path based on an intensity of light received from the light source, wherein a heated enclosure aligns the light sensor with the light path.

A rotary machine is disclosed, which includes a rotary shaft having a rotation axis, a first shaft end, and a second shaft end; a first bearing arrangement at the first shaft end; a second bearing arrangement at the second shaft end; a coupling flange mechanically connected to the first shaft end. The coupling flange is mechanically connected to the first shaft end by means of a first axial-contact coupling.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes a lead screw motor, a lead screw coupled to the lead screw motor, and a carriage coupled to the lead screw. The carriage includes two drive rollers, wherein each drive roller is coupled to a respective splined shaft coupled to a respective yoke, wherein the respective yoke is coupled to a drive pulley and a drive motor that is in a fixed position, wherein movement of the carriage causes the respective splined shaft of the two drive rollers to move guided by the respective yoke.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes a lead screw motor, a lead screw coupled to the lead screw motor, and a carriage coupled to the lead screw. The carriage includes two drive rollers, wherein each drive roller is coupled to a respective splined shaft coupled to a respective yoke, wherein the respective yoke is coupled to a drive pulley and a drive motor that is in a fixed position, wherein movement of the carriage causes the respective splined shaft of the two drive rollers to move guided by the respective yoke.