A controller may send signals to one or more driver circuits for directing {HEAD ~ operation} of {TAIL ~ the actuators} 
of
A controller may send signals to one or more driver circuits for directing { HEAD ~ operation } of { TAIL ~ the actuators }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL