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EC1650H furnish full of ingenuity for measuring with "high accuracy and quickly". EC1650 is economy, EC1750 is high precision type.
-High resolution
-2CR normal type, 2CR phase correct and Gauss filter supplied
-Mechanism / system                          Porous static pressure air bearing system / table rotation type
-Rotation accuracy                               (0.04 + 0.0005H) μm
                                                               H: height from table surface (mm)
-Max. measuring diameter                 φ368 mm both inner and outer diameters
-Loading capacity                                 20 kg
-Z traverse range                                  300 mm (at the use of b-type stylus arm)
                                                                ** In case of EC1650