Stepper Motor, Indexers

More sophisticated stepper drive systems are know as “indexers,” which include a controller that may be programmed for preset moves. Some indexers can perform only one or a limited number of simple moves, while more sophisticated systems can accept hundreds of lines of programming, and perform mathematical functions like circular interpolation. Such a system could be used for a traversing mechanism on a spooler, where the stepper motor is coupled to a linear actuator that moves the spool from side to side as it is spooling wire.