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7. Once shelf width has been set, slowly turn the sizing dial down 4mm. Release the Pause button.
Only the rear portion of the lens will be edged down. This will leave a 2mm deep shelf all around
the front of the lens.
8. Make a note of the size settings for both the first and second cuts. Utilizing these settings, repeat
the procedure for the left lens.
Faceting Procedures:
The Horizon II is capable of faceting a lens. This requires a double pattern/two-cycle method, as well
as a specially crafted cutter body and cutter inserts.
1. Install the faceting cutter body with cutter inserts into the edger.
2. Raise the Teflon bevel guide wheel height to allow 1mm clearance for the ramps of the inserts. In
this situation, the wheel's position is changed by sliding the bevel guide wheel (BGW) assembly
out of the out of the mounting block by loosening the post lock knob. There is a line scribed onto
the post of the BGW assembly that indicates the mounting position for faceting.
3. Move the BGW assembly to the proper position, and tighten the post lock knob.
4. Mount the rimless pattern specified by the frame manufacturer, and engage the Rimless button.
Set the size with the required 2mm overset. Edge both the right and the left lenses as rimless, to
ensure uniformity of the facet between both sides.
5. Bring them both down to the appropriate finished size.
6. Remove the rimless pattern and release the Rimless button.
7. Mount the facet pattern. Adjust the size by an additional overset, as specified on the pattern. This
is usually 4-5mm. In order to allow for any corrections in the facet depth and width, it is advisable
to then add another 2-3mm to the sizing knob adjustment.
8. Looking into the edger, adjust the position of the Teflon bevel guide wheel in relation to the ramp
of the cutter insert. This position will determine the depth of the facet.
9. Press the Pause button, then begin the cycle. When the lens moves into position, use the bevel
adjustment knob to make any necessary adjustments to the facet width. Once proper positioning
has been determined, release the Pause button, and place a test facet on the lens. If the test
positioning is acceptable, turn the sizing dial down to the appropriate adjustment, and edge the
lens down the rest of the way.
10. Run the left lens, keeping the bevel adjustment and sizing knobs in the same position as used on
the right lens.
NATIONAL
INCORPORATED
OPERATING PROCEDURES
Tel: 434-295-9126 Tech Support: 800-247-9796 Fax: 888-239-0778
100 Avon Street, P.O. Box 1547
Charlottesville, VA 22902
Revision: 11/98 Page - 19 -
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