Brother International LK3-B430 Service Manual - Page 32

Movable, knife, position, Moveble, timing, adjustment

Get Brother International LK3-B430 PDF manuals and user guides View all Brother International LK3-B430 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 32 highlights

a THREAD TRIMMER 1. Movable knife position - -A 0 -0 • (1 ) With knife cam lever roller 0 on the periphery of the knife cam. loosen screw Q and move movable knife 0 so that its corner meets the mark 0 (outside) of the needle plate. -r (2) When the power pulley is turned little by little in the rotating direction at the machine stop position (with the work clamp down), knife cam lever claw 0 drops one step further. In this condition, loosen screw 0, and turn stud 0 so that thread retainer 0 contacts the lower thread. * If the above adjustment is incomplete, the lower thread might break due to excessive tension. 2. Moveble knife timing adjustment Late 0 m.a.• Early -0 3-3) / 135* Loosen bolt 0 and turn knife cam to adjust the movable knife timing so that knife cam lever claw 0 drops into a recess of the knife cam when the shuttle hook point is between 90° and I35° (until.it meets the mark© of the shuttle race ring) upon sewing the final stitch. *The timing advances as the knife cam is turned in the rotating direction. - 32 -

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
a
THREAD
TRIMMER
1.
Movable
knife
position
-
-
A
0
—0
•
(1
)
With
knife
cam
lever
roller
0
on
the
periphery
of
the
knife
cam.
loosen
screw
Q
and
move
movable
knife
0
so
that
its
corner
meets
the
mark
0
(outside)
of
the
needle
plate.
-
r
(2)
When
the
power
pulley
is
turned
little
by
little
in
the
rotating
direction
at
the
machine
stop
position
(with
the
work
clamp
down),
knife
cam
lever
claw
0
drops
one
step
further.
In
this
condition,
loosen
screw
0,
and
turn
stud
0
so
that
thread
retainer
0
contacts
the
lower
thread.
*
If
the
above
adjustment
is
incomplete,
the
lower
thread
might
break
due
to
excessive
tension.
2.
Moveble
knife
timing
adjustment
Late
0
3
-
3
)
/
135*
""•••••-m.a.•
Early
-0
Loosen
bolt
0
and
turn
knife
cam
to
adjust
the
movable
knife
timing
so
that
knife
cam
lever
claw
0
drops
into
a
recess
of
the
knife
cam
when
the
shuttle
hook
point
is
between
90°
and
I35°
(until.it
meets
the
mark©
of
the
shuttle
race
ring)
upon
sewing
the
final
stitch.
*
The
timing
advances
as
the
knife
cam
is
turned
in
the
rotating
direction.
-
32
-