Sensors control the operation of {HEAD ~ the jogger assembly} responsive to {TAIL ~ the presence} of a stack to be jogged and responsive to the movement of the jogging assembly to a given position displaced from the nominal operating position 
responsive to
Sensors control the operation of { HEAD ~ the jogger assembly } responsive to { TAIL ~ the presence } of a stack to be jogged and responsive to the movement of the jogging assembly to a given position displaced from the nominal operating position
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH