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Multi-Cam Tracking Bevel Placement System
The second bevel placement method is the multi-cam tracking system. The system
utilizes a stair-step cam mounted on the lens drive motor carriage, and a cam follower
assembly that replaces the bevel guide wheel assembly. The cam has six "steps" that
approximate nominal 2, 4, 5, 6,7, or 8-base fronts.
Figure 5 – Multi-Cam Tracking Bevel Placement System
The Multi-Cam System is most effective with:
1. Half-eyes
2. Irregular fronts, such as executives or lenticulars
3. Lower-base lenses, when a high-based curve is needed for frame insertion
(such as inserting a 2-base lens into a 6-base frame).
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Revision: 11/98 Page - 14 -
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