JUKI LU-1510N-7 Engineer's Manual page 31

Adjustment Procedures
2) Alternate momentum
1. Set the stitch dial to "0".
2. Turn the handwheel to make sure that the amount of alternate vertical
movement of walking foot
3. When the amount of movement is not equal, remove the rubber
plug from the arm top face and loosen setscrew
rear arm to make adjustments so that the amount of movement
can be unified.
Adjust the amount almost to A = B.
o In case of the machine without thread trimmer
Loosen the window plate setscrew and remove the window plate to
adjust the amount.
o In case of the machine with thread trimmer
Remove the rubber plug to adjust the amount.
o When the amount of alternate vertical movement of the walking
foot is larger than that of the presser foot :
1) Loosen setscrew
ing foot is raised a little, press walking foot
2) Re-tighten setscrew
handwheel to make sure of the amount of alternate vertical move-
ment.
Adjustment Procedures
1. Loosen hinge screw nut
2. Move horizontal feed connecting rod
the center of the horizontal feed shaft to that of the hinge screw is
20 ± 0.5 mm and tighten the nut
3. Turn the handwheel to check the needle sway.
(Standard) 1. The engraved marker line on horizontal feed rear
arm aligns with the center of the hinge screw.
2. When the distance is lengthened more than the stan-
dard adjustment value, the bottom feed amount is
decreased.
(Caution) When you desire to change the bottom feed amount,
re-adjust the needle entry position since the needle
entry position changes.
and presser foot
in the top feed rear arm in the state that walk-
in the top feed rear arm and turn the
in the horizontal feed rear arm.
so that the distance from
.
Adjust the vertical stroke of the
walking foot so that it is larger than
that of the presser foot in accordance
is almost equal. with the sewing products.
o Sewing sponge material or the like
in the top feed
o Sewing material with overlapped
When the alternative vertical strokes
of the walking foot and presser foot
are considerably different
o The stitch pitch is different from the
o Decrease the number of revolution
to the feed dog.
o Needle breakage or stitch skipping
– 27 –
Results of Improper Adjustment
sections
value set by the dial.
of the motor a little since the feed
efficiency is decreased.
Results of Improper Adjustment
will result.