A system for detecting movement of {HEAD ~ a forcer} of a motor directed for effecting movement of a forcer in a first direction in {TAIL ~ response} to command pulses 
A system for detecting movement of { HEAD ~ a forcer } of a motor directed for effecting movement of a forcer in a first direction in { TAIL ~ response } to command pulses
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH