Brother International DA-9280 Instruction Manual - English - Page 24

10. STANDARD ADJUSTMENTS 10-7. Upper thread take-up thread guide adjustment Adjust the distance between the center of the upper thread take-up and the top of the thread guide will be 6 - 7 mm. q w 1. Turn the pulley toward yourself until the needle bar is down at the lowest position. 2. Loosen the screw q, and then move the upper thread take-up thread guide w up or down to adjust so that the distance from the top of the upper thread take-up thread guide w to the center of the upper thread takeup hole is 6 - 7 mm. 6 - 7mm * The higher the upper thread take-up thread guide w, the greater will be the upper thread loops. 3. Tighten the screw q. 10-8. Upper thread nipper adjustment 0.5 - 0.7mm (for two needles) q 0.8 - 1.0mm (for three needles) w Thread nipper cam e 10-9. Thread release shaft adjustment q w Adjust so that the maximum clearance between the upper thread tension bracket w and the thread tension plate e is 0.5 - 0.7 mm (for two needles) or 0.8 - 1.0 mm (for three needles). Loosen the set screw q, and then move the upper thread tension bracket w in or out to adjust so that the maximum clearance between it and the thread tension plate e is 0.5 - 0.7 mm (for two needles) or 0.8 - 1.0 mm (for three needles). * The thread tension will become better if the clearance between the upper thread tension bracket w and the thread tension plate e is reduced. Adjust the thread release shaft so that the thread tension discs loosen when the presser foot is raised and tighten when the presser foot is lowered. 1. Loosen set screw q. 2. Make an adjustment by turning thread release shaft w so that the thread tension discs begin to loosen when the presser foot rises 4 mm above the top of the needle plate. 3. After the adjustment, retighten set screw q securely. 10-10. Lower thread take-up timing adjustment Adjusting hole w e q Make an adjustment so that, when the loopers begin moving backward, lower thread take-up q contacts thread w, and is 7 mm up from lower thread take-up base e. 1. Insert screwdriver through the adjusting hole in the lower thread take-up base, and loosen two set screws r. 7mm 2. Raise lower thread take-up q until it is 7 mm up from thread take-up base e. 3. After the adjustment, retighten two set screws r se- curely. r DA-9280 19