a motor drive for driving said motor on the basis of {HEAD ~ the target motor current} set by {TAIL ~ said control unit}; and 
a motor drive for driving said motor on the basis of { HEAD ~ the target motor current } set by { TAIL ~ said control unit } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH