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

4-14. Adjusting the stitch length

3
1

4-15. 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-3528, 3528-7, 3578, 3578-7]
• Adjust the needle and the hook as follows.
) Adjust the sttch dal to the scale (type A or F : 2, type S : 2.5, type G : 3).
2) Turn the handwheel to brng the needle bar to the lowest poston and loosen needle bar connectng
stud clampng screw 1 .
3) Determne the heght of needle bar. The upper two of engraved marker lnes are for DP X 5 needle,
and the lower two of them are for DP X 7 needle.
[Adjusting procedure for DP X 5 needle]
Adjust top engraved marker lne A of needle bar 2 to the bottom end of needle bar rockng base 3 ,
and tghten the needle bar connectng stud clampng screw 1 . At ths tme, the needle bar goes up by 2.2
mm from the lowest poston (adjust the second engraved marker lne B to the bottom end of needle
bar rockng base 3 ) and the blade pont of hook algns wth the center of needle. Then the dstance
between the top end of needle eyelet and the blade pont of hook becomes .2 mm.
[Adjusting procedure for DP X 17 needle]
Use the lower two of the engraved marker lnes, and perform the adjustment by the same procedure as
that of [Adjustng procedure for DP X 5 needle].
Turn sttch dal 1 counterclockwse (clockwse)
to set the value on the dal correspondng to a
desred sttch length to the marker dot 3 engraved
on the machne arm.
When t s hard to turn sttch dal 1 , turn t whle
slghtly depressng reverse feed control lever 2 .
2
• Reverse feed operation
)
2)
3)
3
A
2
1
– 2 –
Depress reverse feed control lever 2 .
Reverse sttches are made as long as you
keep depressng the lever.
Release lever, and the machne wll run
forward.
B