The ALTA XLd uses advanced Smart Design technology to produce custom shapes for Briot edgers with built-in milling capability. It blocks automatically using a camera based system to help eliminate human error. Tracer Features include: Multi-axis tracer precisely records the frame’s characteristics, shape, and curvature. Traces Metal, Plastic / Zyl frames along with patterns and demo lenses. Automatic progressive lens recognition. Easy positioning of the frame. Gentle frame realignment during clamping operation. Camera-based lens tracing Automatic drill point recognition Memory: 512 jobs and 2048 patterns. Blocker Features include: Parallax and prism-free camera blocking. Ergonomic. Completely automatic blocking Eliminates human error from manual blocking.