JUKI LU-1510 Engineer's Manual page 7

Adjustment Procedures
1. Set the stitch dial to "0" mm.
2. Turn the handwheel to bring the needle bar to the lower dead
point of its stroke.
3. Loosen setscrew ① in the needle bar frame rear arm.
4. Adjust the clearance between presser bar ② and walking
bar ③ to the dimension A and securely tighten the setscrew.
At this time, measure the distance from the top surface of the
throat plate to the line as shown in Fig. 1 with the presser foot
raised.
(Caution) • Tighten the setscrew so that there is no thrust
play in the needle bar frame shaft.
1. Set the stitch dial to "0" mm.
2. Turn the handwheel to bring the needle bar to the lower dead
point of its stroke.
3. Loosen setscrew ③ in the feed rocker.
4. Move the feed bar to adjust so that needle ① enters the center
of the needle hole of feed dog ② , and securely tighten the
setscrew.
How to check
1. Set the stitch dial at the maximum.
2. Turn the handwheel and check that the clearance between
the slot in the throat plate and the feed dog is as shown in
Fig. 4 at the position where the feed dog travels to its front
end.
In addition, check that the feed dog does not come in contact
with the throat plate at the position where the feed dog travels
to its rear end.
(Standard)
• When the feed amount is at its maximum, A = approx. 1.5
mm.
Results of Improper Adjustment
• Stitch skipping or needle breakage
will result.
• Loose stitches will result.
• The throat plate comes in contact
with the feed dog and contact noise
will occur. As a result, the throat
plate and the feed dog may be
damaged.
• Irregular stitches will result.
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