Upper Thread Trimmer Mechanism - Brother HE-800A Service Manual

1. MECHANICAL DESCRIPTIONS

1-10. Upper thread trimmer mechanism

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