Rotary positioning apparatus for an aimed device

A rotary positioning apparatus can adjust the rotational position of a device to be aimed about a desired axis. It can include an device mount that includes the aimed device. A motor can be coupled to the device mount or a shaft extending from the device mount to generate a rotational force to rotate the device mount. Primary mechanical flexures can be positioned along opposing ends of the device mount to provide a mechanical resistance to the rotation imparted on the device mount by the motor. A brake system can be included to stop rotation of the device mount with or without the motor engaged. Secondary mechanical flexures can be coupled to each of the primary mechanical flexures and constructed of materials that give it a lower torque resistance so that the secondary mechanical flexures can begin rotating before the primary mechanical flexures to provide small angle adjustability.