Brother BAS-300G-484, Инструкция по эксплуатации

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10. STANDARD ADJUSTMENTS
BAS-300G-484, BAS-300G-484 SF 58
10-9. Replacing the movable and fixed knives
1. Loosen the two bolts (1) and then remove the feed plate (2).
2. Open the hook cover, remove the two screws (3) and the two flat screws (4), and then remove the needle plate (5).
3. Remove the movable knife (6) and the fixed knife (7).
4. Install the new movable knife (6) and fixed knife (7) in the positions shown in the illustration.
* Apply grease to the outside of the movable knife collar (8) at this time.
* Install the fixed knife (7) 0.5 mm away from the needle hole plate (9).
5. Check that the movable knife (6) and fixed knife (7) cut the thread cleanly. Replace the movable knife spacer with
accessory spacers (10) (t=0.4, 0.5, 0.6, 0.7) so that the knives trim the thread accurately.
* If the knife pressure is too weak and the thread is not completely cut, use a thinner movable knife spacer (10).
* If the knife pressure is too strong and the movable knife turns stiffly, use a thicker movable knife spacer (10).
6. Apply grease to the pin (11), place it into the movable
knife connecting plate (12), and install it to the needle
plate (5).
7. Check that the needle is aligned with the center of the
needle hole.
4691M
4692M 4693M
4694M