| 摘要 |
An initial position setting method for grinding work apparatus includes: a grind stone 11; a pair of lens rotating shafts 14, 14 which are capable of approaching and drawing apart each other along a normal line of the grind stone 11; a ditch excavation grind stone 23 and chamfering grind stones 24, 25 which are capable of moving to a predetermined position; motors M2, P1 and 55 which make the lens rotating shafts 14, 14 rotating, approaching and drawing apart and so on; a driving mechanism 30 which makes the ditch excavation grind stone 23 and the chamfering grind stones 24, 25 moving; and an optical sensor 57 which detects a contact of a lens to be processed held by the lens rotating shafts 14, 14 with the grind stone 11. A measurement standard 70 with a predetermined shape is adapted to be held by the lens rotating shafts 14, 14. The ditch excavation grind stone 23 and the chamfering grind stones 24, 25 are adapted to be moved to the predetermined position. The lens rotating shafts 14, 14 are adapted to be moved in order for the measurement standard 70 to contact with the ditch excavation grind stone 23 or the chamfering grind stones 24, 25 to obtain a moving distance of the lens rotating shafts 14, 14 when the measurement standard 70 is contacted and to carry out an initial setting for moving distance of the ditch excavation grind stone or the chamfering grind stones on a basis of the moving distance of lens rotating shafts 14, 14 and a dimension of the measurement standard.
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