Adjusting The Stitch Length; Needle-To-Hook Relation - JUKI LH-3500A Series Instruction Manual

4-16. Adjusting the stitch length

❸
❶

4-17. Needle-to-hook relation

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
[LH-3528A, 3528A-7, 3578A and 3578A-7]
• Adjust the needle and the hook as follows.
1) Set the stitch dial at 2 for the A or F type, 2.5 for the S type or 3 for the G type.
2) Turn the handwheel to bring the needle bar to the lowest position and loosen needle bar connecting stud
clamping screw ❶ .
3) Determine the height of needle bar. The upper two of engraved marker lines are for DPx5(134) needle,
and the lower two of them are for DP X 17(135x17) needle.
[Adjusting procedure for DPx5(134) needle]
Adjust top engraved marker line A of needle bar ❷ to the bottom end of needle bar rocking base ❸ , and
tighten the needle bar connecting stud clamping screw ❶ . At this time, the needle bar goes up by 2.2 mm
from the lowest position (adjust the second engraved marker line B to the bottom end of needle bar rocking
base ❸ ) and the blade point of hook aligns with the center of needle. Then the distance between the top end
of needle eyelet and the blade point of hook becomes 1.2 mm.
[Adjusting procedure for DP X 17(135x17) needle]
Use the lower two of the engraved marker lines, and perform the adjustment by the same procedure as that
of [Adjusting procedure for DPx5(134) needle].
Turn stitch dial ❶ counterclockwise (clockwise) to
set the value on the dial corresponding to a desired
stitch length to the marker dot ❸ engraved on the
machine arm.
When it is hard to turn stitch dial ❶ , turn it while
❷
slightly depressing reverse feed control lever ❷ .
• Reverse feed operation
1) Depress reverse feed control lever ❷ .
2) Reverse stitches are made as long as you keep
3) Release lever, and the machine will run forward.
❸
A
❶
❷
– 27 –
depressing the lever.
B