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