Thread Trimmer Mechanism (2) - Brother LK3-B430E Mark II Service Manual

5-10. Thread trimmer mechanism (2)

r
0.5 mm
!2
!1
1. Fit the hole of the thread trimmer connecting rod q over the pin of the connecting lever w. Secure the
needle plate e using the screws r and t so that the hole on the needle plate is centered at the needle
position.
2. Turn the pulley y until the mark u has slightly passed over the horizontal line.
* Adjust the position of the pulley to the position where the cam grooves on the thread trimmer cam do
not fluctuate.
3. Attach the thread trimming solenoid i using the screw o. At this time, the plunger ! 0 of the thread
trimming solenoid i must be fully pressed (the same status as when the thread trimming solenoid i is
turned on), and a 0.5 mm clearance must be provided between the thread trimmer driving lever ! 1 and the
driving lever stopper !2 .
4. Make sure that the thread trimmer driving lever !1 moves smoothly when the plunger !0 is pressed and
released.
5. Tilt the machine head until it stops.
6. Loosen the nut !4 and move the connecting rod lever !5 to the left or right to adjust so that the V section A
is aligned with the index mark B on the needle plate when the sewing machine in the stopped position
and the movable knife !3 is moved toward the index mark.
7. Return the machine head to its original position.
t
Rotation direction
y
e
u
q
w
!0
i
o
LK3-B430E Mark II
Pulley
!5
!4
5. ASSEMBLY
o
e
!3
B
A
i
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