Brother International BES-1240BC Instruction Manual - English - Page 243
Adjustment of Clearance Between Needle and Rotary Hook
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Chapter 10 Standard Adjustment 3. Adjustment of Clearance Between Needle and Rotary Hook 1. Turn the power switch off. o q 2. Select the needle bar No. 1 q. The illustration at the left shows the case of BES-940BC. For BES-1240BC, the No. 12 needle becomes 9. w e 3. Remove two flat screws w and dismount the needle plate e. 2mm 2mm r t i 0.3~0.5mm 4. Adjust the needle r and the rotary hook's t point so that they can put together at 2 mm above the needle bar lowest point (180˚) where the pulley indication mark " " and the stop mark "NH " are aligned. 5. Turn the rotary hook manually so that the point comes upward. 6. Loosen the set screw u on the side of the bed y. 7. Turn the eccentric screw i on the left side of the bed y using a regular screwdriver and adjust a clearance between the needle and the rotary shaft to 0.3 ~ 0.5 mm. u Note) Check that the needle bar height is 2 mm at this time. 8. Adjust the clearance between the needle and the rotary hook's point to 0.3 ~ 0.5 mm at the needle bar No. 9 o (No. 12 needle for BES-1240BC). Note) If the clearance between the needle and the rotary hook's point is not within the range of 0.3 ~ 0.5 mm, adjust again as described in step r until the clearance between the needle bar No. 1 or No. 9 (No. 12 for BES-1240BC) and the rotary hook's point becomes within 0.3 ~ 0.5 mm. BES-940BC • BES-1240BC 241