Lathe having a guided movable cutter

摘要: An automatic or semi-automatic lathe especially useful for producing pre-determined optical surfaces on plastic contact lenses. A collet supported the spindle of a variable speed motor supports lens blank in coaxial alignment with spindle. cutter is held vertically adjustable tool post mounted one pair stacked stages arranged linear movement radial and axial blank, respectively. The other stage carriage which turn base blank. second acting through cam-operated X/Y drive mechanisms drives to move across into face rotating thereby generating any desired combination concave and/or convex optically curved surfaces. In an alternative embodiment, individual motors power sliding wedges like.