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