Brother HE-800A - Upper Thread Trimmer Mechanism

1. MECHANICAL DESCRIPTIONS
HE-800A
12
1-10. Upper thread trimmer mechanism
4058Q
Sewing starts
(machine starts)
The presser foot drops.
The upper thread
scissors retract and
the presser foot lifts
The upper thread is
clamped and cut.
After 1.5-2.5 mm of feed,
the upper thread scissors
gradually start to open.
The upper thread
scissors move forward.
Sewing ends.
After approximately
4.6mm of feed, the upper
thread scissors are fully
o
p
en.
U
pp
er thread trimmin
g
Upper thread trimmer mechanism operating sequence
Presser
foot
drops
Presser
foot
lifts