Abstract: A rotary platform includes a rotating top plate rotatable about axis and a stationary base plate fixed in relation to the axis. A plurality of bearing elements is disposed in a cavity defined, at least in part, by the base plate and the top plate. The top plate is supported by the plurality of bearing elements, which are rotatable in any direction and about any axis. The top plate is flexible and flexes independently of the base plate. Flexing of the top plate allows the top plate to maximize contact with as many of the bearing elements as possible to improve the load carrying capacity of rotary platform.

Abstract: A rotary carousel apparatus includes a stationary base and a central column fixed relative to the base. Rotatable first and second drive plates are positioned to rotate about a central axis of the column. At least one torque tube assembly extends between the first drive plate and at least one second drive plate and is operative for rotational movement with a rotation of the drive plates. At least one shelf is connected to the at least one torque tube assembly. A drive assembly is operatively directly or indirectly coupled to one of the first drive plate and the at least one second drive plate, such that rotation of the drive assembly causes a corresponding rotation of one of the first and second drive plates connected thereto and a rotation of the other of the first and second drive plates through the at least one torque tube assembly.

Abstract: A rotary platform includes a rotating top plate rotatable about axis and a stationary base plate fixed in relation to the axis. A plurality of bearing elements is disposed in a cavity defined, at least in part, by the base plate and the top plate. The top plate is supported by the plurality of bearing elements, which are rotatable in any direction and about any axis. The top plate is flexible and flexes independently of the base plate. Flexing of the top plate allows the top plate to maximize contact with as many of the bearing elements as possible to improve the load carrying capacity of rotary platform.

Abstract: The present invention is a rotary indexing table driven by an induction motor. The rotary indexing table includes a rotatable work supporting platform, an AC induction motor including a motor shaft coupled to the rotatable work supporting platform; and a controller operatively coupled to the AC induction motor. The AC induction motor is equipped with a high resolution positional feedback device. The high-resolution positional feedback device may be an encoder or a resolver. The controller is configured to drive the AC induction motor in a direct drive manner. The high-resolution positional feedback device is operatively coupled to the controller, and the controller is configured to filter a signal provided by the high-resolution positional feedback device. The signal provided by the high-resolution positional feedback device may be a square wave or a sine wave. The present invention is also directed to a method precisely driving and positioning a rotary indexing table.

Abstract: A rotary table or turntable includes a work supporting platform with a driven pin carrier attached thereto. The pin carrier includes a circular array of pins engaged with a driven cycloidal gear. The cycloidal gear is driven by a prime mover, such as a servomotor, and a controller whereby the turntable is provided with a cycloidal pin gearing drive arrangement with antibacklash properties for improved positioning of work pieces on the work supporting surface.