Brother International BAS-311F-L Instruction Manual - English - Page 52
STANDARD ADJUSTMENTS, <Replacing the movable and fixed knives>
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9. STANDARD ADJUSTMENTS (1) (2) (3) (4) (5) 1245S (7) (6) 1246S 1. Remove screws (1), and remove feed plate (2). Remove screws (3) and (4), and remove needle plate (5). Now disconnect the thread cutter connecting rod (6) from stud (7). (8) Movable knife waster (10) (9) 1247S (9) 0.5 mm 1248S 2. Remove the movable knife, and replace it with a new movable knife. Now check the cutting edge of the movable knife (8) and the fixed knife (9). If necessary, use the provided movable knife washer to adjust the knives so that they cut properly. 3. Install the fixed knife (9) 0.5 mm away from needle hole plate (10). Adjusting the engagement of the movable knife and fixed knife Fig. 1 A B C D Cutting edge Cutting edge 0149S Movable knife Fix knife Cutting edge Cutting edge 0148Q A. After the movable knife and fixed knife are properly engaged, tighten the screw as shown in Fig.1. B. Turn the movable knife (in the direction of the arrow) while the screw is still tightened. C. Loosen the screw. D. Turn the movable knife (in the direction of the arrow) while the screw is still loosened. Repeat above steps A, B, C and D four or five times to maintain the cutting performance of the knife. 0150Q BAS-311F-0, 311F-L, 326F-0 45