A device for highly precise adjustment and positioning of a magnet structure (1), with a drive device (2), by means of which the magnet structure (1) for adjusting the - and can be positioned, wherein said driving means (2) a plurality of drive units (3, 4, 5, 6), the mechanically separated from one another and in each case with of the magnet structure (1) are connected, and wherein each drive unit (3, 4, 5, 6) equipped with a length-measuring device (8, 17, 18, 19) is associated, by means of which the respective position of the magnet structure (1) can be detected, characterised in that the drive units (3, 4, 5, 6) in each case individually and regulated in dependence on one another to a predeterminable desired value can be moved, wherein the respective position of the magnet structure (1) as a reproducible regulating variable for the operation of the respective measuring device (8, 17, 18, 19) associated drive unit (3, 4, 5, 6) acts, and wherein a drive unit (3) and the of this drive unit (3) associated measuring device (8) to a dispatcher - unit (7) connected, in turn by means of a clocked bus system (10) with a control device..
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