Inkremental position measuring device with reference marks

摘要

In Figure 1, a position measuring device (P) is shown, which has a scale (1) with a measuring graduation (2), a reference mark track (3) and a switching track (4). By means of an operating mode change-over switch (B), either an operating mode can be selected in which all the reference marks (Ri) of the reference mark track (3) are evaluated, or only individual reference marks (Ri, Ri + 4, Ri + 8), which are scanned by a scanning device (6) together with a marking (Mi - 1, Mi, Mi + 1) of the switching track (4). …IMAGE…