The exciting pulses are of similar magnitude and {HEAD ~ timing} as that of the signal field generated by the slip drive of {TAIL ~ the stepper motor} 
The exciting pulses are of similar magnitude and { HEAD ~ timing } as that of the signal field generated by the slip drive of { TAIL ~ the stepper motor }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL