JUKI LU-1510N Engineer's Manual page 27

Adjustment Procedures
1) Amount of alternate vertical movement
™ In case of the machine without thread trimmer
1. Loosen the window plate setscrew and remove the window
plate.
2. Loosen hinge screw nut 1 of the top feed rod.
3. Move up or down the position of boss 2 of the cam rod to
adjust the amount.
4. After the adjustment, tighten hinge screw nut 1 of the top feed
rod.
5. Attach the window plate.
™ Upper part of long hole / working amount is large.
™ Lower part of long hole / working amount is small.
(Caution) Maximum number of revolution is set in accordance
with sewing conditions. Set the maximum number of
revolution in accordance with the respective conditions
and do not exceed the set value.
™ In case of the machine with thread trimmer
1. Set the scale of the alternate vertical dial to the minimum and
remove the top cover.
2. Loosen setscrew 4 in the vertical adjusting arm.
3. Adjust the position of vertical adjusting arm 1 to 83 to 84 mm
from edge 2 of the machine arm and assemble it so that it
aligns with the edge of vertical change base 3 in the lateral
direction.
4. Securely tighten setscrew 4 in the vertical adjusting arm.
5. Set the alternate vertical dial to the minimum and attach the
top cover.
6. Turn the alternate vertical dial and check to be sure that the
scale of dial and the amount of alternate vertical movement
are correct.
Results of Improper Adjustment
Increase the height of working in
accordance with the sewing
products.
™ Sewing sponge material or the
like
™ Sewing material with overlapped
sections
™ When working amount is in
creased, difference of stitch
pitch and stitch dial occurs.
™ Slightly reduce the number of
revolution of the motor since
feed force is decreased.
Increase the vertical stroke of the
walking foot in accordance with the
sewing products.
™ Sewing sponge material or the
like
™ Sewing material with overlapped
sections
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