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Adjustment Procedure
1. Adjust the feed dial graduations.
o DDL-9000A-SH: Feed dial graduation 4
o Other than DDL-9000A-SH: Feed dial graduation 3
2. Let the sewing machine fall down and check the engraved marker
line position of the vertical feed cam
o DDL-9000A-SH: +10° (
o Other than DDL-9000A-SH: 0° (
For adjustments, loosen two vertical feed cam setscrews
the cam to the engraved marker line
(Cautions) The angle of the engraved marker line graduation 1
denotes 10
3. Loosen two lower sprocket screws
4. At the feed dog lowering timing (position where the upper end of the
feed dog coincides with the upper plane of the throat plate), fix the
vertical feed cam
until the upper end of the needle hole coincides with the upper plane
of the throat plate.
* In cases other than the DDL-9000A-SH, coincidence of the
engraved marker dot
marker dot
of the flywheel can be regarded as the standard for
needle hole upper end lowering.
When coincidence is confirmed, tighten two lower sprocket screws
.
(Tightening torque for reference: 4.5N•m)
5. Adjust the thread trimmer cam timing.
Refer to [3.–(11) Thread trimmer unit -1) Thread trimmer cam
standard timing].
6. Adjust the hook timing.
Refer to [(2) Needle and hook timing].
(Cautions) When the above-mentioned adjustments are finished,
operate the sewing machine and examine whether any
unusual sound or torque is generated or the thread
trimmer unit works normally.
.
)
)
.
°
.
.
and slowly turn the flywheel in forward direction
of the pulley cover with the engraved
Results of Improper Adjustment
and adjust
o When tightening the two vertical
– 9 –
feed cam setscrews
should be done while a good cen-
tering is secured.
Otherwise, there will be adverse
torque or unusual sound generation,
or abnormal wear may be caused.
, this work
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