Patent ID: 6283826
Filing Date: 2001-09-04
Classification: B24B

Abstract:
An eyeglass lens grinding apparatus for grinding a periphery of a lens, the apparatus comprising:a processing unit including a processing control unit that can control processing pressure, wherein the processing unit processes a lens while depressing the lens onto at least one of abrasive wheels under control by the processing control unit based on processing data;a first lens chuck shaft to which a lens fixing cup is mounted, the lens fixing cup being mounted to the lens;a second lens chuck shaft having a lens pressing holder, which is arranged coaxially with respect to the first lens chuck shaft;a rotating unit which rotates the first lens chuck shaft;a moving unit which relatively moves the second lens chuck shaft with respect to the first lens chuck shaft in a direction of an axis of rotation to clamp the lens;a detection unit which detects an angle of rotation of the second lens chuck shaft with respect to the angle of rotation of the first lens chuck shaft; andan instruction unit which instructs the processing control unit to lower the processing pressure, based on a result of detection by the detection unit, if an angular deviation exceeding a predetermined level is caused.