Method of centering optical lenses with CNC controlled arrangement eliminating continuous supervision of the centering machine

摘要

The method involves using an arrangement for which all control and, regulation and measurement functions are undertaken by a CNC controller that coordinates the entire process. Grinding tools (19) and lenses are held in a tool magazine that interacts with an extraction arrangement (4). The torque of the drive (9) for axial movement of the upper centering spindle (8) can be regulated in the W-axis, even when stationary, and it is also possible to automatically center lenses with a critical angle of less than 6 deg . For time saving and quality improvement during axis centering, the revolution rate of the centering spindles (7,8) forming the C-axis and/or the feed force of the upper centering spindle can be varied by evaluating the results of a laser measurement. An Independent claim is also included for an arrangement for centering optical lenses.