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Abstract

The present invention relates to a method and a device for forming a bevel on the edge of a glass lens using a lens-edge machining apparatus with computer numerical control. The method of the present invention comprises the following steps: scanning the bevel groove of a glass-lens opening in a selected glass rim, said scanning including the shape of the cross section and the periphery of the bevel groove; sending the data thus obtained to a control device of the lens-edge machining apparatus; scanning the bevel groove of a glass-lens machining tool in order to determine the diameter and the shape of the cross section; sending the values thus obtained to the control device of the lens-edge machining apparatus; comparing the values of the bevel groove of the lens-edge machining tool; and machining the vebel according to the data obtained if the compared values are within a first allowance range which can be predetermined, machining the bevel according to a correction value if the compared values are within a second allowance range or interrupting the bevel machining process if the compared values are not in the first nor the second allowance ranges.

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First Claim