Dac Air

The DAC International RxD Lathe is a high-precision diamond turning lathe for spectacle lens back-surface generation. All turned plastic lenses are ready for Soft Lap Polishing. A dual diamond tool assembly is mounted on the Z' air-bearing slide, which is driven by a voice coil and a proprietary Digital Motion Control system. The tool is precisely positioned in synchronization with the spindle to generate the sphere, cylinder and prism prescriptions. The air-bearing spindle is DC motor driven with encoder feedback. A patented electronic/mechanical force and vibration cancellation assembly eliminates more than 99% of machine frame vibration, resulting in a surface that is ready for Soft Lap Polishing. The surface is so smooth that on some materials, particularly CR-39, it is possible to go from the RxD directly to hard coating with no polish step required. The spindle speed is automatically set by the computer to optimize production throughput while maintaining surface finishes of the very best quality. All axes are precisely controlled through the use of high resolution digital encoders. DAC International's proprietary Specialty Lens Menu Software takes you a step beyond conventional Free Form. All Free Form shapes and asymmetrical designs are generated on the back surface of spherical lens blanks. The PAL menu works with customer-supplied points files to generate backside Progressive Add Lens designs. The DAC Specialty Lens Menu is used to create designs, such as Slabs <b>...</b>