Brother Z-8550A Instruction Manual download pdf (Page 74)

Z-8550A, 8560A

12. STANDARD ADJUSTMENTS

4. Remove the presser foot (3), needle plate (4), auxiliary

needle plate (5), feed dog (6) and spacer (7) (856A only).

5. Turn the machine pulley to raise the needle bar (8) from

its lowest position until the reference line on the thread

takeup (9) is aligned with the Ø mark on the face plate,

and then check the following.

• The tip of the rotary hook (10) should be aligned with

the center of the needle.

• The distance from the tip of the rotary hook (10) to the

needle should be 0 to 0.05 mm.

6. If the above are not correct, loosen the two screws (11)

and adjust the position of the rotary hook (12).

After adjustment, securely tighten the two screws (11).

7. Set the zigzag width to the maximum setting (8 mm).

8. Turn the machine pulley to move the needle to its furthest

left position so that the tip of the rotary hook (10) is

aligned with the center of the needle, and check that the

distance from the upper edge of the needle hole to the

tip of the rotary hook (10) is 0.2 to 0.5 mm at this time.

* If the distance is not correct, adjust the height of the

needle bar. (Refer to page 64.)

9. If needle deflection occurs when sewing material with

joints, bend the needle guard (13) as shown in the

illustration (A) so that it touches the needle.

* After this, check that the clearance between the tip of

the rotary hook (10) and the needle is 0 to 0.05 mm.

10. Press the TEST key (1) so that the TEST icon (2)

switches off. (Normal sewing will then be possible.)

Turn off the power to continue adjustment.

12-10. Bobbin case holder position bracket position

Adjust so that the end of the bobbin case holder position

bracket (1) is 0 to 0.5 mm back from end (A) of the inner

rotary hook (2).

* The end of the bobbin case holder position bracket (1)

must never extend to the right of end (A) of the inner

rotary hook (2).

1. Loosen the screw (3) and adjust the position of the

bobbin case holder position bracket (1).

2. Securely tighten the screw (3).

Maximum zigzag width

3526M

3527M

3525M

3528M

3806M

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Brother Z-8550A Instruction Manual Page 74

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