Abstract: The invention relates to a method for fine machining a cylindrical workpiece surface of a workpiece blank by means of a fine machining tool. Said method comprising the following steps: generating a relative rotational movement between a tool and a workpiece blank about a machining axis which is concentric to a cylindrical workpiece surface of the workpiece blank; generating a relative feed rate between the tool and the workpiece blank along the machining axis; detecting an actual value of a process variable which is a function of a relative force between the tool and the workpiece blank and which can assume a plurality of process variable values; and continuously controlling the process variable by changing the relative feed rate in such a way that the more the relative feed rate changes, the more the actual value of the process variable deviates from a desired value of the process variable.

Abstract: An electromagnetic micro positioner, e.g. for use in fibre optics, is operated by a ceramic piston (8) mounted within a ceramic cylinder (5). The piston (8) is moved by a permanent magnet (9) and an electromagnetic circuit (1/2). By changing the coil (2) polarity the piston (8) will either be attracted or repelled to its top or bottom position. In particular the core (1), capable of polarity reversal, has a magnetic remanence by means of which the movable piston (8) is fixable in one of the two predefined positions when the coil (2) is not energized.

Abstract: An electromagnetic micro positioner, e.g. for use in fibre optics, is operated by a ceramic piston (8) mounted within a ceramic cylinder (5). The piston (8) is moved by a permanent magnet (9) and an electromagnetic circuit (1/2). By changing the coil (2) polarity the piston (8) will either be attracted or repelled to its top or bottom position. In particular the core (1), capable of polarity reversal, has a magnetic remanence by means of which the movable piston (8) is fixable in one of the two predefined positions when the coil (2) is not energized.

Abstract: Printed products are transported on a transport path to a product storage apparatus disposed laterally of the transport path by a curved transport segment and are transported from the product storage apparatus to the next processing station on a straight removal segment disposed approximately at a right angle to the transport path.