For decades cam indexers have been used in automated lines to provide high precision location and sometimes in multiple stations in order for a process to be performed very accurately. Today cam indexing can be used in a variety of ways and provide a superior accuracy to other technologies. During fully automated operations, when the robot is programmed to start an operation at the same position, accuracy and high repeatability is essential to exceptional quality. During coordinated operations, like a mig-welding process, a zero-backlash system is a superior solution over a gear head that can have several arc minutes of backlash. Cam indexers that are used in fully automated positioner applications offer a superior solution as far as overall accuracy and ability to provide zero backlash operation.