driving the motor in accordance with the fed input signal to move {HEAD ~ the movable member} to {TAIL ~ the desired final position} 
to
driving the motor in accordance with the fed input signal to move { HEAD ~ the movable member } to { TAIL ~ the desired final position }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL