JUKI LU-2810 Series, Руководство инженера

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WARNING :
Turn �FF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
Trouble Cause Checking Corrective measures
4. Stitch skipping 4-1) Clearance between the
needle and the blade point
of hook is too large.
1-A) Check the clearance. Refer to “2.-(6) Needle-to-hook timing”.
4-2) Needle-to-hook timing is
excessively advanced or
retarded.
2-A) Check the specified dimen -
sion.
Refer to “2.-(6) Needle-to-hook timing”.
4-3) Presser foot is rising. (Pres-
sure of the presser foot is
too low.)
3-A) Check the pressure of the
presser foot.
Tighten the presser spring regulator.
4-4) Height of the needle bar is
improper.
4-A) Check the lowest point of the
needle bar.
Refer to “2.-(6) Needle-to-hook timing”.
4-5) Blade point of the hook is
blunt.
5-A) Check the blade point of the
hook.
Correct the blade point of the hook or replace
the hook with a new one.
4-6) Improper type of needle is
used.
Replace the needle with one which is thicker
than the current needle by one count.
4-7) Hook needle guard is not
unctioned.
7-A) Check the functional amount
of the needle guard.
Refer to “2.-(6) Needle-to-hook timing”.
4-8) Thread take-up spring
excessively works or the
stroke of the spring is too
small.
Decrease the tension of the thread take-up
spring and increase the stroke of the spring.
4-9) Feed timing is not proper. Refer to “2.-(8) Feed cam timing”.
4-10) Needle thread tension is too
high.
Adjust the needle thread tension.
海外講習会用121122 LU-2810(-7)̲EM