In {HEAD ~ the second step current} to {TAIL ~ coil A} is turned off and current to coil B is turned on in opposite sense to that in the induction phase to change the polarity at the pole ends 34 and 38 
In { HEAD ~ the second step current } to { TAIL ~ coil A } is turned off and current to coil B is turned on in opposite sense to that in the induction phase to change the polarity at the pole ends 34 and 38
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH