Figure 4-16. - Setting needlebar.
and a variety 87 (16 x 87). Place the needle into the needlebar as far as it will go. Be sure the long thread groove faces the left a n d t h e e y e o f t h e n e e d l e i s i n l i n e w i th the shuttle point. Remove the faceplate and loosen the needlebar connecting stud pinch screw (figure 4-16 [A]). Turn the balance wheel toward the operator until the needlebar is on its upstroke and the point of the shuttle is in the center of the eye of the needle. Adjust the needlebar so that the eye of the needle is one-sixteenth of an inch below the shuttle point (figure 4-16 [B]). Now retighten the needlebar connecting stud pinch screw (figure 4-16 [A]).
NOTE: The main timing point for the 31-15 sewing machine is the needlebar.
For average weight material, a full tooth should be visible when the feed dogs are at their highest point. To adjust the feed dog height, you must loosen the feed lifting crank pinch screw (figure 4-17 [A]) in the feed lifting crank and move the feed bar (figure 4-17 [B]) up or down as required. Then you must retighten the feed lifting crank pinch screw.
Figure 4-17. - Adjusting feed dogs.Continue Reading