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