Patent ID: 7335087
Filing Date: 2008-02-26
Classification: B24B

Abstract:
1. An eyeglass lens processing apparatus comprising: a lens chucking unit including two lens chucks for chucking an eyeglass lens and a first driver for moving at least one of the lens chucks in an axial direction of the lens chucks; a lens rotating unit including a second driver for rotating the lens chucks; an axis-to-axis distance changing unit including a third driver for changing an axis-to-axis distance between an axis of rotation center of a processing tool for processing a periphery of the lens and an axis of rotation center of the lens chucks; a controller that controls at least one of the second driver and the third driver so that a processing load applied to the lens during processing falls below a predetermined allowable value; and a processing mode selector that selects one of a first processing mode in which the allowable value of the processing load is set to be high, and a second processing mode in which the allowable value of the processing load is set to be lower than the allowable value of the first processing mode so as to suppress axis deviation when the lens having a surface slipping readily is processed, wherein the controller controls the first driver so that a second chucking pressure of the lens chucks when the second processing mode is selected is smaller than a first chucking pressure of the lens chucks when the first processing mode is selected.