HOW TO ADJUST SEWING MACHINE’S NEEDLE BAR

NEEDLE BAR ADJUSTMENT

The tip of the rotary hook (3) should be aligned with the center of the needle (4) when the needle bar (1) moves up from its lowest position to the position where reference line (b), which is the line at the bottom of the needle bar (1) (third line from the bottom when using a DA x 1 needle), is aligned with the lower edge of the needle bar bush D (2) as shown in the illustration.

  1. Turn the machine pulley to raise the needle bar (1) from its lowest position until reference line (b) is aligned with the lower edge of the needle bar bush D (2) as shown in the illustration. (The needle should rise by 1.8 mm [2.2 mm for -[][] 5 specifications] and the distance from the needle hole to the tip of the rotary hook should be 0–0.5 mm.)
  2. Loosen the set screws (5), and then align the tip of the rotary hook (3) with the center of the needle (4). The distance between the tip of the rotary hook (3) and the needle (4) should be approximately 0–0.05 mm.
  3. Securely tighten the set screws (5).

NEEDLE BAR ADJUSTMENT

<Checking the clearance between the rotary hook and bobbin case holder position bracket> Check that the clearance between the rotary hook (6) and the bobbin case holder position bracket (7) is enough to allow the thread being used to pass through smoothly. The clearance should be 0.4–0.7 mm for -4[]S / 4[]3 models, and 0.6–0.9 mm for -4[]5 models.

Comments

dfgdfsgdfgfdg

You may also like...