US Patent 7934789 Drive mechanism of printhead cradle

A drive mechanism of a printhead cradle is provided which has a motor, a rotor element drive assembly coupled with the motor for operating a rotor element of a printhead received by the printhead cradle, a print media transport assembly coupled with the motor for transporting print media past the received printhead, a controller for controlling the motor, and a rotor element angle sensor in signal communication with the controller for sensing an orientation of the rotor element.