Z-Theta systems offer a compact package to achieve a rotary axis and a linear axis in a single unit. When operated in coordinated motion, it can effectively create a helical motion path. The systems also can be used to move to defined linear positions and then perform independent rotary moves. The Kerk ScrewRail is the centerpiece of the development, with the linear and rotary power being supplied by Haydon and Pittman motor technology. The systems can be used for picker-type applications in automated kiosks, data storage libraries and other repetitive-motion tasks requiring both a linear and a rotary move.