9. ADJUSTMENTS

9-21. Adjusting the position of the thread trimming cam (8560A only)

3809M

Flush

1182B

1166B

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 aligned with the edge of the knife unit

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 unbevelled 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).

1157B

<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 the 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.

1183B

Z-8550A, 8560A

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