Patent ID: 6050877
Filing Date: 2000-04-18
Classification: B24B

Abstract:
An eyeglass lens grinding machine for grinding a periphery of a lens to fit into an eyeglass frame, comprising:processing means for processing the periphery of the lens using a rotating abrasive wheel;lens rotating means for holding and rotating the lens;configuration data inputting means for entering configuration data on the eyeglass frame or a template therefor;layout data inputting means for entering data to be used in providing a layout of the lens corresponding to the eyeglass frame;processing data calculating means for calculating processing data on the basis of the data entered by said configuration data inputting means and said layout data inputting means;axis-to-axis distance control means for controlling an axis-to-axis distance between an axis about which the abrasive wheel is rotated and an axis about which the lens is rotated on the basis of said processing data;edge position detecting means for detecting an edge position on each of front and rear surfaces of the lens, which is expected after completion of rough processing or finish processing, on the basis of said processing data;edge thickness calculating means for obtaining an edge thickness of the lens on the basis of the edge position thus detected; androtation control means for controlling a rotational speed of said lens rotating means on the basis of the edge thickness thus obtained so that the rotational speed of the lens is slower as the edge thickness is larger.