JUKI LS-1340 Manual page 17

Adjustment Procedures
1) Amount of alternate vertical movement
™In case of LS-1340 and LS-1341
1. Loosen hinge screw nut 1 in the top feed rod.
2. Move the position of boss 2 on the cam rod up or down to
adjust the position.
3. After the adjustment, tighten hinge screw nut 1 in the feed
rod.
™ If the boss is fixed in the upper section of the long hole →
Amount of movement becomes large.
™ If the boss is fixed in the lower section of the long hole →
Amount of movement becomes small.
(Caution)
1. The max. sewing speed is specified in accordance with
the sewing conditions.
2. Set the max. sewing speed appropriately in accordance
with the respective conditions given taking care not to
exceed the corresponding specified value.
™In case of LS-1342 and LS-1342-7
1. Remove the top cover.
2. Loosen setscrew 8 in the vertical adjusting arm.
3. Adjust the position of vertical adjusting arm 5 to 73 to 74 mm
from edge 6 of the machine arm and assemble it so that it
aligns with the edge of vertical change base 7 in the lateral
direction.
4. Securely tighten setscrew 8 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 vertical stroke of the
walking foot in accordance with the
sewing products.
™ Sewing sponge material or the
like
™ Sewing material with overlapped
sections
If the the amount of alternate
vertical movement is increased, the
stitch pitch may be different from
the value set by the dial.
Decrease the number of revolution
of the motor a little since the feed
efficiency is decreased.
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