Work Clamp Lifter Mechanism; Work Clamp Lifter And Thread Wiper Mechanisms - Brother LK3-B430E Mark II Service Manual

3-2. Work clamp lifter mechanism

1. When the presser signal is on, the presser solenoid q operates.
2. The plunger w moves in the direction of the arrow, and consequently link (C) assy e, link shaft B r, and
link B t move.
3. Link B t presses the presser plate u down via link shaft C y.

3-3. Work clamp lifter and thread wiper mechanisms

u
i
o
!0
!1
!2
e
r
t
y
u
y
q
w
r
t
e
LK3-B430E Mark II
3. MECHANICAL DESCRIPTIONS
w
1. When the presser plate q lowers, the presser arm
lever plate w is pressed down, presser arm levers
R and L r pivot on the presser arm lever shaft e,
and work clamps R and L t rise.
2. When the presser plate q lowers, the motion is
transmitted to the thread wiper driving lever u,
the thread wiper rod assembly i, and the thread
wiper link o via link shaft B y, and the thread wiper
arm !1 and the thread wiper !2 operate via the
thread wiper arm support ! 0 .
3. When the presser solenoid is turned off, the presser
plate q rises, and work clamps R and L t lower.
Simultaneously, the thread wiper !2 operates in
the opposite direction.
q
6