Patent ID: 7414378

Claim:
A high precision positioning powered turntable for handling materials comprises: (i) a turntable top structure; (ii) a base frame structure for providing a housing structure for a motor and for providing a foundation structure for said turntable top structure; (iii) a slewing ring bearing for rotatably attaching said turntable top structure to said base frame structure; wherein said slewing ring bearing comprises an inner and outer rings slidably attached to each other, wherein said inner ring of said slewing ring bearing has an integral gear and a plurality of fastening means for fastening said turntable top structure, and said outer ring of said slewing ring bearing has a plurality of fastening means for fastening said slewing ring onto said base frame structure, wherein said motor has a pinion gear engaging with said gear on said inner ring of said slewing ring bearing; (iv) a controlling means, comprising: a plurality of sensing means attached around said base frame structure for measuring the position and movement of said turntable top structure; a processing means for computing the position and movement of said turntable top structure, and deciding the next movement of said turntable top structure; a storage means for storing instructions programmed for said processing means; and a motor driving means for driving said motor controlled by said processing means.