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