Table of Contents
Advertisement
PERIPHERY FINISHES:
The "V" of the hide-a-bevel insert set has a depth of 1mm and included angles of
o
115
. This results in a 120° angle on the lens bevel. To bevel a lens, follow the procedures
in the EDGING A LENS section. The front-to-back location of the bevel can be adjusted
using either of the two systems explained in the BEVEL PLACEMENT SYSTEMS section.
Grooving Procedures:
In the hands of an experienced operator, the edger will groove a lens periphery as thin
as 2mm. The beveling cutter must first be replaced with the grooving cutter.
Note: The edger's sizing dial is set for beveling. Rimless cuts require an overset of
2mm to compensate for the depth of the bevel.
Size-on-size setting for beveling = 36.5mm.
Size-on-size setting for rimless = 38.5mm.
High Plus Lenses – A Helpful Hint: It is very difficult, at times impossible, to place
an acceptable groove on a high plus lens while using the front tracking bevel
placement system (Teflon wheel system). It is suggested that the operator cut the lens
using the multi-cam system. The lens should be cut oversize, to check groove
placement, before bringing it down to final size.
Rimless Procedures:
Most insert sets, with the exception of the modified hide-a-bevel cutters which have a 5
rise, can cut a rimless lens by engaging the Rimless lock switch on the control panel, prior to edging the lens.
Note: As with grooving, the size setting must be overset by 2mm to account for the depth of the bevel.
Roll and Bevel Procedures:
In order to achieve a roll and bevel effect on a lens, the special roll and bevel cutter inserts, and
reinforced cutter body must first be installed in the edger. Then proceed as follows:
1. Set sizing knob 6mm over anticipated finished size.
2. Activate the Rimless and Pause buttons. This activates the flow control cycle. Set the flow rate
control knob to the speed appropriate to the material that is being cut. A good rule of thumb is 1
for polycarbonate, 3 for high index, and 5 for CR39.
3. Start cycle.
4. After roughing is complete, and the lens is rotating away from the blades, release the Rimless
button. The lens will then shift in front of the orange mark on the cutter body.
NATIONAL
INCORPORATED
OPERATING PROCEDURES
Tel: 434-295-9126 Tech Support: 800-247-9796 Fax: 888-239-0778
o
, 7
100 Avon Street, P.O. Box 1547
Charlottesville, VA 22902
Revision: 11/98 Page - 17 -
o
o
, or 12
Advertisement
Table of Contents
