JUKI LU-1510N Engineer's Manual page 19

Adjustment Procedures
1) Hand lifter
1. Loosen setscrew 3 in the side cover located at the anti-
operator's side of the machine arm and remove side cover 4.
(Machine without thread trimmer only)
2. Loosen clamping screw 1 in the presser bar bracket to set the
hand lifter 2 to the raised state.
3. Adjust the lifting amount to 9 ± 0.3 mm. At this time, the
adjustment can be easily performed when inserting a thing of
9 mm thick between the top surface of the throat plate and the
bottom face of the presser foot.
4. Tighten clamping screw 1 in the presser bar bracket. Move
the presser foot to the left or the right and tighten the screw in
the state that the presser foot does not interfere with the walking
foot.
5. Remove the thing inserted between the top surface of the throat
plate and the bottom face of the presser foot.
6. Attach side cover 4 (Machine without thread trimmer only)
2) Knee lifter (Machine without thread trimmer only)
1. Remove the knee press plate and tilt the machine arm.
2. Loosen stopper nut 5 and adjust the lifting amount by screwing
amount of stopper screw 6. Adjust the height from the top
surface of the throat plate to the bottom face of the presser
foot to 16±0.5 mm.
3. Taking care so as not to move stopper screw 6, tighten stopper
nut 5.
™ Tighten stopper screw 6 / Lifting amount is decreased.
™ Loosen stopper screw 6 / Lifting amount is increased.
Results of Improper Adjustment
When the lifting amount is higher
than the specified value :
™ The presser foot is held raised
from the top surface of the throat
plate even when the hand lifter
is returned to its home position.
When the lifting amount is lower
than the specified value :
™ The presser foot is not sufficiently
raised and the working property
may be deteriorated.
When the lifting amount is higher
than the specified value :
™ The top end of the needle bar
interferes with the walking foot
and the walking foot may be
damaged when the presser foot
is raised.
When the lifting amount is lower
than the specified value :
™ The presser foot is not sufficiently
raised and the working property
may be deteriorated.
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