a. Plain weave: A plain weave is a weave where each filling passes alternately over and under each warp in a square pattern. The interlacing is opposite in neighbouring cells. The repeat is over two ends and two picks.
9. Stitch regulator: This controls the length of the stitch. Some regulators can be set to stitch in reverse. 10. Bobbin winder: This facilitates the winding of thread on the bobbin. Some are made to stop automatically when the bobbin is full.