Brother International HE-800B Instruction Manual - English - Page 79

Adjusting the lower thread clamp timing, 9-10. Adjusting the bobbin presser

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9. STANDARD ADJUSTMENTS 9-9. Adjusting the lower thread clamp timing Becomes Becomes faster slower 1. Gently tilt back the machine head. 2. When reference line A on feed guide shaft B (1) is aligned with the edge of the feed arm support (2), the opening plate (3) will start moving when the feed mechanism moves 6-7 mm from the home position, and the lower thread retainer (4) will open. To change the opening timing, loosen the screw (5) of the feed arm support (2) and move feed guide shaft B (1) to the left or right. 3. Gently return the machine head to its original position. 3988Q 9-10. Adjusting the bobbin presser 1. Press the THREAD key to switch to threading mode. 2. Gently tilt back the machine head. 3. Loosen the set screw (1), and then adjust so that the bobbin presser (2) goes into the hole in the bobbin case (3). 4. Check that the work clamp is at the home position, and then loosen the nut (4) and turn the screw (5) to adjust the clearance A between the bobbin presser (2) and the edge of the bed to approximately 12.5 mm. 5. Gently return the machine head to its original position. 6. Press the THREAD key. 3989Q HE-800B 70

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HE-800B
9. STANDARD ADJUSTMENTS
70
9-9. Adjusting the lower thread clamp timing
1. Gently tilt back the machine head.
2. When reference line A on feed guide shaft B (1) is
aligned with the edge of the feed arm support (2), the
opening plate (3) will start moving when the feed
mechanism moves 6-7 mm from the home position,
and the lower thread retainer (4) will open.
To change the opening timing, loosen the screw (5) of
the feed arm support (2) and move feed guide shaft B
(1) to the left or right.
3. Gently return the machine head to its original position.
9-10. Adjusting the bobbin presser
1. Press the THREAD key to switch to threading mode.
2. Gently tilt back the machine head.
3. Loosen the set screw (1), and then adjust so that the
bobbin presser (2) goes into the hole in the bobbin
case (3).
4. Check that the work clamp is at the home position,
and then loosen the nut (4) and turn the screw (5) to
adjust the clearance A between the bobbin presser (2)
and the edge of the bed to approximately 12.5 mm.
5. Gently return the machine head to its original position.
6. Press the THREAD key.
3988Q
Becomes
faster
Becomes
slower
3989Q