Thread Trimmer Mechanism - Brother LK3-B430E Mark II Service Manual

3-5. Thread trimmer mechanism

r
t
y
!3
1. When the thread trimming signal is on, the thread trimming solenoid q pushes the pushing lever driving
lever w.
2. The pushing lever driving lever w which pivots on the shoulder screw e, pushes the thread trimmer
driving lever r in the direction of the arrow, and slides on the driving lever shaft t.
3. The roller y attached to the thread trimmer driving lever r is inserted into the groove of the thread
trimmer cam u, and the thread trimmer rod i operates.
4. The thread trimmer rod i moves the connecting rod lever ! 0 via the thread trimmer lever o.
5. The thread trimmer connecting rod !1 attached to the connecting rod lever !0 operates, and the movable
knife !2 slides on the fixed knife !3 to trim the thread.
!1
!2
LK3-B430E Mark II
w
e
u
o
!0
3. MECHANICAL DESCRIPTIONS
q
i
8