JUKI LU-1510N Engineer's Manual page 11

Adjustment Procedures
1. Set the stitch dial to "0".
2. Turn the handwheel to bring the needle bar to the lowest dead
point of its stroke.
3. Loosen clamping screw 1 in the needle bar rocking rear arm.
4. In the state that the presser foot is raised, adjust the clearance
between presser bar 2 and walking bar 3 to dimension A at
the position where the distance from the top surface of the
throat plate to the presser foot is 60 mm (standard gauge type)
or 47 mm (LU-2200 gauge type), Then securely tighten
clamping screw 1 in the needle bar rocking rear arm.
(Caution) Tighten the screw so that the needle bar rocking
shaft has no thrust play.
Adjustment Procedures
1. Set the stitch dial to "0 ".
2. Turn the handwheel to bring the needle bar to the lowest dead
point of its stroke.
3. Loosen clamping screw 3 in the feed rocker.
4. Move the feed base 4 and adjust so that needle 1 enters the
center of the needle hole in feed dog 2. Then securely tighten
clamping screw 3 in the feed rocker. (a = a')
Checking method
1. Set the stitch dial to the maximum.
2. Turn the handwheel and make sure that feed dog 2 does not
come in contact with the throat plate at the position where the
feed dog travels fully to the front or to the rear.
Results of Improper Adjustment
™ Stitch skipping or needle
breakage will result.
™ Poorly tensed stitches will result.
Results of Improper Adjustment
™ The throat plate comes in
contact with the feed dog and
contacting noise occurs and the
throat plate or the feed dog may
be damaged.
™ Irregular stitches may result.
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