The present application provides a kind of little
bird nest thread trimming control method, configure little
bird nest thread trimming mechanism, little
bird nest thread trimming mechanism includes auxiliary knife, movable knife and thread clamping
assembly, movable knife is equipped with sewing thread trimming blade edge, sewing thread
hooking groove and avoiding needle passing groove;Sewing first needle, needle passes through sewing thread
hooking groove, the thread end on the side of needle is brought to the lower of movable knife;Sewing first needle needle moves up, movable knife moves, so that avoiding needle passing groove is located directly below needle, and thread clamping
assembly clamps thread end;
Sewing machine sewing second needle, third needle,..., until Nth needle, in the process of sewing Nth needle, thread end is
cut, when thread lifting lever moves up to target position A, movable knife moves towards auxiliary knife direction, sewing thread trimming blade edge is engaged with auxiliary knife and cuts thread end, and target position A is the non-highest point position of thread lifting lever;Thread lifting lever continues to move up, retracts the thread under sewing material, and tightens bottom thread, reduces bird
nest length, and more reliably realizes sewing little bird
nest.