Presser Arm Mechanism - Brother LK3-B430E Mark II Service Manual

5. ASSEMBLY

5-13. Presser arm mechanism

!2
1. Place the slide block q on the pin of the X feed lever w, fit the feed bracket e into the feed bar guide plate
r with care not to drop the ball bearing, pass the slide block q through the slot in the feed bracket e, and
secure the fed bar guide plate r using the screw t.
2. Attach the feed plate y using the flat u and the screw i.
3. Pass the tack width feed shaft o through the hole in the feed bracket e and the hole of the Y feed lever !0 ,
adjust the former to the screw flat, and press the tack width feed shaft o from above to secure it using the
set screw ! 1 .
4. Attach the rubber cap ! 2 .
5. With attention not to let the bearing balls in the presser arm support shaft ! 4 fall, fit the presser arm ! 3 to
the protrusion of the feed bracket e, and secure the presser arm ! 3 to the feed bracket e using the bolt ! 5
and the washer ! 6 .
6. Secure the presser arm support shaft !4 using the set screws so that the back of the support plate !7 can
just make contact with ball bearings in the presser arm support shaft !4 when the work clamp rises.
7. Turn on the power of the machine, set the program to No.00, press the foot switch to reset X and Y to
original position.
8. Make sure that the slot !8 is centered in the work clamp !9 and the feed plate y.
If it is not, loosen the flat screw u and the screw i of the feed plate y and the bolt !5 of the presser arm
! 3 , and adjust the position of the slot ! 8 .
If it still is not centered turn off the power, loosen the screws @ 0 and @ 1 , and turn the feed home position
dogs @ 2 and @ 3 little by little.Then tighten the screws @ 0 and @ 1 , and perform u for positioning.
* At this time, the clearance between the feed home position dog and the sensor sensing surface should
be 0.1 - 0.5 mm.
9. After adjustment is completed, turn off the power.
39
o
t
e
r
!1
!0
q
w
@2
!9
y
@0
!8
X direction
LK3-B430E Mark II
!4
!9
0.1 -
0.5 mm
!7
!3
!5
!6
@3
0.1 - 0.5 mm
@1
Y direction
u
i
y