Displacement pick-up for detecting of actuator with two indexing wheels

A displacement pick-up for detecting the displacement of an actuator driven by a rotating drive element, having an indexing mechanism (11), which has a first indexing wheel (13), connected to the drive element in a manner fixed against relative rotation for driving the indexing mechanism, with at least one indexing cam (19) disposed on the indexing wheel, and a second indexing wheel (15), rotatable about a pivot axis (16) that is axially parallel to the drive element, the second indexing wheel carrying an encompassing set of teeth (20) that cooperates with the at least one indexing cam (19), and upon every revolution of the first indexing wheel (13) is rotated onward by at least one indexing step, in each case with a fixed rotary angle, by means of temporary engagement of the indexing cam (19) with the teeth (20), and having a device (12) which senses the second indexing wheel for detecting the rotary position of the second indexing wheel (15), characterized in that the teeth (20) and the indexing cam (19) meshing with them are embodied with large surface areas, and that the two indexing wheels (13, 15) are magnetized such that the respective immediately adjacent faces of the two indexing wheels (13, 15) repel one another.