The continuous need for miniaturization in industry and research requires smaller precision motorized rotation stages for many alignment applications in optics, photonics and medical design. Motorized miniature rotary stages from PI are available with different motor drive principles to suit various requirements. For the smallest size, closed-loop piezo motors are integrated into the miniature rotation stages. These direct-drive motors provide high speed and repeatability and are free of backlash. A direct measuring encoder for position feedback is integrated in the miniature rotary table body for high position accuracy. Depending on the technology used, table diameters are as small as 18.5mm. The more traditional mini rotation stages use stepper motors and closed-loop servo motors driving the rotation platform via a worm gear that increases motor torque and resolution. It also locks the rotary platform into place when the motion controller is turned off. The stepper motor rotary stages can provide resolution in the arcsecond range when driven with a micro-stepping motor controller such as the Mercury compact, low cost single axis stepper motor controller.