Brother S-7780A Instruction Manual page 69

1mm - 1.5mm
1442D
1mm - 1.5mm
1443D
S-7780A
<Movable knife and fixed knife position adjustment>
1. Turn the machine pulley, and then push the plunger (1) of
the thread trimming solenoid with your finger.
2. In this condition, turn the machine pulley until the roller
shaft (4) of the thread trimmer cam lever assembly (3) is
sitting on top of the thread trimmer cam (2), then move the
thread trimmer lever (7) to adjust its position so that the tip
of the fixed knife (5) and the blade of the movable knife (6)
are meshed by 1 to 1.5 mm, and then tighten the screw
(8).
* Tighten the screw (8) so that there is no play in the
forked shaft (9).
* The lower thread finger (10) must be underneath the
movable knife (6).
3. Install the feed dog, needle plate and presser foot.
6. STANDARD ADJUSTMENTS
60