MODEL 3128
16
NEEDLE TIMING TO SHUTTLE
MACHINE SETTING
1. Stitch selector:
" ".
TO CHECK:
The height of the needle point from its lowest point of travel should be in the range of 1.45 -
1.95 mm when the tip of the shuttle hook just meets the left side of the needle at the left
needle position.
ADJUSTMENT PROCEDURE:
1. Remove rear cover (see page 5).
2. Set the pattern selector dial at maximum zigzag with and needle drop position is at
"left".
3. Open the shuttle cover.
4. Remove the shuttle race ring.
5. Turn the handwheel toward you until the tip of the shuttle hook meets the left side of
the needle.
6. Loosen the lower shaft crank arm setscrews "A".
7. While holding the shuttle hook so it doesn't turn, turn the handwheel toward you until
the needle comes to its lowest position. Then, further turn the handwheel to raise the
needle about 1.7 mm from its lowest position.
8. Tighten the setscrews "A".
9. Turn the handwheel toward you to check if the height is in the range of 1.45 - 1.95 mm.
If it is not in this range, repeat the above procedure.
10. Attach the shuttle race ring.
11. Attach the rear cover.
MECHANICAL ADJUSTMENT
LOWER SHAFT CRANK ARM
A
1.45-1.95MM
LOWEST POSITION
