As Y axis motor 102 rotates counter clockwise, {HEAD ~ line side 19 b} moves into {TAIL ~ Y axis bull wheel} through sheaves 180, 172, 181 
moves into
As Y axis motor 102 rotates counter clockwise , { HEAD ~ line side 19 b } moves into { TAIL ~ Y axis bull wheel } through sheaves 180 , 172 , 181
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH