a passage sensor switchable by {HEAD ~ a sheet} in {TAIL ~ an end} of picking position, wherein movement of the motor roller in the retraction direction starts with a switching of the passage sensor and terminates with another switching of the passage sensor upon the sheet passing through the end of picking position 
in
a passage sensor switchable by { HEAD ~ a sheet } in { TAIL ~ an end } of picking position , wherein movement of the motor roller in the retraction direction starts with a switching of the passage sensor and terminates with another switching of the passage sensor upon the sheet passing through the end of picking position
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH