Brother International DA-9280 Instruction Manual - English - Page 21

Needle and looper timing adjustment

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10. STANDARD ADJUSTMENTS 10-2. Needle and looper timing adjustment r e u y t w q Make an adjustment so that, when needles q are down lowest loopers w reach the end of their backward travel and the distance from the needle center to the looper tip is 2.7 to 2.9 mm. 1. Remove the presser foot, needle plate and feed dogs (Refer to page 15) 2. Remove the two screws e, and then open the belt cover plate r. 3. Turn the pulley toward yourself until loopers w reach the end of their backward travel. 4. Loosen cap screw t, and then loosen two set screws u on lower belt wheel y. 5. Turn the pulley toward yourself until needles q come down to the lowest position. 6. Tighten two set screws u securely, and then tighten cap screw t. 7. Loosen set screw i, move looper holder o in the arrow direction until the distance between the needle center and the looper tip is 2.7 to 2.9 mm, and retighten set screw i securely. 8. Make sure that the looper thread eyes match the needle eyes in the forward and backward travels of the loopers. 9. Close the belt cover plate r, and then tighten the two screws e. 10. Install the presser foot, needle plate and feed dogs. 2.7 - 2.9mm o i Looper forward travel Looper backward travel 16 DA-9280

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DA-9280
16
10-2.
Needle and looper timing adjustment
Looper forward travel
Looper backward travel
Make an adjustment so that, when needles
q
are down
lowest loopers
w
reach the end of their backward travel and
the distance from the needle center to the looper tip is 2.7
to 2.9 mm.
1.
Remove the presser foot, needle plate and feed dogs
(Refer to page 15)
2.
Remove the two screws
e
, and then open the belt
cover plate
r
.
3.
Turn the pulley toward yourself until loopers
w
reach
the end of their backward travel.
4.
Loosen cap screw
t
, and then loosen two set screws
u
on lower belt wheel
y
.
5.
Turn the pulley toward yourself until needles
q
come
down to the lowest position.
6.
Tighten two set screws
u
securely, and then tighten cap
screw
t
.
7.
Loosen set screw
i
, move looper holder
o
in the ar-
row direction until the distance between the needle
center and the looper tip is 2.7 to 2.9 mm, and retighten
set screw
i
securely.
8.
Make sure that the looper thread eyes match the needle
eyes in the forward and backward travels of the loop-
ers.
9.
Close the belt cover plate
r
, and then tighten the two
screws
e
.
10.
Install the presser foot, needle plate and feed dogs.
10. STANDARD ADJUSTMENTS
t
e
r
2.7 - 2.9mm
q
w
u
o
i
y