When {TAIL ~ the holder} is in a cutting position, a cutter is moved to cut {HEAD ~ one or more notches} in the key blank 
When
When { TAIL ~ the holder } is in a cutting position , a cutter is moved to cut { HEAD ~ one or more notches } in the key blank
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH