{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/9594"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/9594","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Design and implementation of a rotary fast tool servo for a turning machine","abstract":"In this thesis we describe the design and implementation of a rotary fast tool servo (RFTS) in a machine tool for turning ophthalmic lenses. To machine nonrotationally symmetric lenses, the cutting tool on the RFTS must move synchronously with the spindle rotation. Therefore, to cut a lens at high spindle speeds, the cutting tool must be capable of extremely high accelerations. In our design we mount the cutting tool at the end of a rotary arm. This allows us to achieve higher accelerations and lower vibrations than conventional fast tool servos. 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