Thread Trimmer Mechanism - Brother BAS-311E Service Manual

Chapter 1. Mechanical description

5. Thread trimmer mechanism

r
t
y
!1
!2
!3
1. When the thread trimmer signal is on, the thread trimming solenoid q pushes the pushing lever driving lever w.
2. The pushing lever driving lever w pushes the thread trimmer driving lever r in the direction of the arrow, pivoting on
the shoulder screw e. The pushing lever driving lever w slides along the driving lever shaft t.
3. The roller y attached to the thread trimming driving lever r fits into the groove of the thread trimmer cam u, and
operates the thread trimmer rod i.
4. As the thread trimmer lever o is linked to the thread trimmer rod i, the connecting rod lever !0 operates.
5. When the thread trimmer connecting rod ! 1 linked to the connecting rod lever ! 0 operates, the fixed knife ! 2 and the
movable knife !3 fit into each other and perform thread trimming.
8
e
u
!0
BAS-311E.311EL.326E.326EL
w
o
q
i