Brother International Z-8550A Instruction Manual - English - Page 76

Adjusting the position of the thread trimming cam (8560A only)

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12. STANDARD ADJUSTMENTS 12-14. Adjusting the position of the thread trimming cam (8560A only) 3535M The knife unit (1) should already be installed in the correct way when the following adjustments are carried out. 1. Tilt back the machine head. 2. Loosen the two screws (2). 3. Move the stopper (4) to adjust so that the edge of the movable knife (3) is 0.5 mm inside the edge of the knife unit (1). 4. Securely tighten the two screws (2). 5. Loosen the two set screws (5) and the two set screws (6). 6. While pushing the thread trimming driving rod (7) by hand, adjust the horizontal position of the thread trimming cam (10) so that the roller (9) of the main lever (8) moves smoothly in and out of the straight section (A) of the groove in the thread trimming cam (10). 7. Provisionally tighten the two set screws (5). 8. Place the set screw collar (11) firmly against the thread trimming cam (10), and then securely tighten the two set screws (6). 3536M 3537M 1. While still pushing thread trimming driving rod (7) by hand, turn the machine pulley slowly by hand toward you until the reference line on the thread take-up lever (12) is aligned with the T mark on the face plate. Adjust the position of the thread trimming cam (10) so that the knife begins to move at this point. 2. Securely tighten the two set screws (5). 3. While still pushing thread trimming driving rod (7) by hand, turn the machine pulley slowly by hand toward you until the reference line on the thread take-up lever (12) is aligned with the T mark on the face plate. Check that the knife begins to move at this point, and that it returns when the reference line is aligned with the U mark. 3538M Z-8550A, 8560A 68

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Z-8550A, 8560A
12. STANDARD ADJUSTMENTS
68
12-14. Adjusting the position of the thread trimming cam (8560A only)
The knife unit (1) should already be installed in the correct
way when the following adjustments are carried out.
<Horizontal position adjustment>
1. Tilt back the machine head.
2. Loosen the two screws (2).
3. Move the stopper (4) to adjust so that the edge of the
movable knife (3) is 0.5 mm inside the edge of the knife
unit (1).
4. Securely tighten the two screws (2).
5. Loosen the two set screws (5) and the two set screws
(6).
6. While pushing the thread trimming driving rod (7) by
hand, adjust the horizontal position of the thread
trimming cam (10) so that the roller (9) of the main lever
(8) moves smoothly in and out of the straight section (A)
of the groove in the thread trimming cam (10).
7. Provisionally tighten the two set screws (5).
8. Place the set screw collar (11) firmly against the thread
trimming cam (10), and then securely tighten the two set
screws (6).
<Rotating direction adjustment>
1. While still pushing thread trimming driving rod (7) by
hand, turn the machine pulley slowly by hand toward you
until the reference line on the thread take-up lever (12) is
aligned with the T mark on the face plate. Adjust the
position of the thread trimming cam (10) so that the knife
begins to move at this point.
2. Securely tighten the two set screws (5).
3. While still pushing thread trimming driving rod (7) by
hand, turn the machine pulley slowly by hand toward you
until the reference line on the thread take-up lever (12) is
aligned with the T mark on the face plate. Check that the
knife begins to move at this point, and that it returns
when the reference line is aligned with the U mark.
3535M
3536M
3537M
3538M