In a stepper motor system including a stepper motor having a ferromagnetic rotor with peripheral teeth magnetizable by an external field, and a plurality of {TAIL ~ ferromagnetic cores} adjacent the rotor, each core having a coil, and {HEAD ~ a drive circuit} for exciting the coils to establish external fields, the method of rotating the rotor comprising the steps of: 
In a stepper motor system including a stepper motor having a ferromagnetic rotor with peripheral teeth magnetizable by an external field , and a plurality of { TAIL ~ ferromagnetic cores } adjacent the rotor , each core having a coil , and { HEAD ~ a drive circuit } for exciting the coils to establish external fields , the method of rotating the rotor comprising the steps of :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH