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