Device having a changeable tool for processing workpiece sheets

A device for processing workpiece sheets, for packaging, the device comprising:

• a processing station configured to receive the workpiece sheets in succession;
• at least one changeable tool configured for the processing station and moved toward another changeable tool and against the sheet introduced in the processing station to process the sheet;
• at least one holder on a device side for the changeable tool, the holder being configured to be positionally adjusted to a target position that optimally aligns the changeable tool with the another changeable tool;
• a central electronic control unit configured for controlling the device, the control unit comprising a memory for storing target position data for the at least one target position;
• electronic digital position sensors that output an actual position of the holder, and the sensors are coupled to the control unit;
• adjusters for adjusting position of the holder;
• the control unit is configured to store in the memory the actual position of the holder determined by the sensors;
• the electronic digital sensors are configured to determine a current actual position of the holder;
• and
• a digital display device coupled to the control unit and configured to display the target position and the current actual position of the holder or of parts coupled thereto, or to display a relation of the target position and the current actual position for the at least one changeable tool,
• wherein the sensors are coupled to the holder,
• wherein the control unit is programmed to cause display of direction of movement of an adjuster in order to reach the target position without mechanical slack.