The movement phase of {HEAD ~ the motor} occurs in several steps and begins by turning off {TAIL ~ the current} to coil B  
The movement phase of { HEAD ~ the motor } occurs in several steps and begins by turning off { TAIL ~ the current } to coil B
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH