Heidenhain Quadra-CHEK 2000 Here is the PDF of the operating manual:  Heidenhain QUADRA-CHEK 2000 Operating Manual According to the Heidenhain product catalog, here is more about the Quadra-CHEK 2000: Application • Profile projectors • Measuring microscopes • 2-D measuring machines … Continue reading Quadra-CHEK 2000