Replacing The Button Feeder Components And Positioning Them - JUKI LK1903B/BSS302 Instruction Manual

13. Replacing the button feeder components and positioning them

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
(1) Replacing the button carrier and positioning it
❶
❸
Button carrier
(2) Replacing the work attachment
Rotary rod (fine positioning shaft)
Work attachment
(3) Replacing the feed plate and positioning it
Replacing the pan
Align with matchmarks.
❶
ø16
Pan
❷
Pinion
❷
Feed plate
ø22
To replace the button carrier, loosen screw ❸ , then remove
the button carrier. Replace the button carrier with one with
a proper center-to-center distance, and fit the button carrier
with a proper center-to-center distance to eccentric cam ❷ ,
and simultaneously make the top face of the carrier come in
contact with nut ❶ . Now fix the carrier by screw ❸ .
(Caution)
The above-stated positioning procedure should be
carried out with the sewing machine set to the origin.
Remove the work attachment currently attached on the
sewing machine from the rotary rod. Then attach the work
attachment of another type on the machine. At this time,
be sure to confirm that the work attachment securely fits in
position.
1) Remove butterfly nut ❶ , take out cap ❷ , and replace the
feed plate.
Use the feed plate of ø16 mm when sewing buttons of
which diameter is ø10 to ø15 mm. If the outside diameter
of the button is ø16 to ø18 mm, use the feed plate of ø22
mm.
To adjust the position of the feed plate, confirm that the
pinion is in its origin and attach the feed plate at the
position where the matchmark (countersinking) on the
pinion aligns with the matchmark on the feed plate. At this
time, align the hole in the pan with the hole in the feed
plate on the triple pawl.
2) It is necessary to adjust the pan located under the feed
plate to the diameter of the hole in the feed plate. The pan
is provided with two holes, one is ø16 hole and the other
is ø22 mm hole. When using the feed plate of ø16 mm,
attach the pan by turning it over so that its ø16 mm hole
comes this side with respect to the rotational direction
of the feed plate. When using the feed plate of ø22 mm,
attach the pan by turning it over so that its ø22 mm hole
comes this side with respect to the rotational direction of
the feed plate.
3) Adjust the initial position of the triple-pawl taking the value
which is obtained by adding 1 mm to the diameter of the
button hole in the feed plate used as reference.
Make the adjustment using the positioning stopper screw.
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