JUKI MH-481, Инструкция по эксплуатации

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Troubles Causes Corrective measures
5 Set position of the frame thread eyelet
is not suitable. ™ Try to lower the position.
Refer to “25. POSITION OF THE FRAME
THREAD EYELET”.
6
Position of the thread take-up lever is
not suitable. ™ Try to push it up.
Refer to “24. POSITION OF THE THREAD
TAKE-UP LEVER”.
7 Throat plate does not fi t. ™ Replace it with other throat plate which has
larger needle hole.
4. Needle breakage 1 Needle is bent. ™ Replace it with a straight needle.
Refer to “6. ATTACHING THE NEEDLE”.
2 The timing of the needle motion with
that of needle is not correct. ™ Adjust the timing.
Refer to “17. ADJUSTING THE FEED TIM-
ING”.
3 Position of the presser foot is wrong. ™ See if the hole of presser foot, hole of throat
plate and loop guide plate are placed in the
center of needle.
4 Motion of the needle guard is not ad-
equate. ™ Check the position and timing of the motion of
the needle guard.
Refer to “22. MATCHING THE MOTION OF
THE NEEDLE GUARDS WITH THE LOOP
GUIDE”.
5 The tension of needle thread is too
high. ™ Loosen the tension.
Refer to “9. THREAD TENSION”.
6 Thickness of the needle is not suitable. ™ Replace it with a suitable needle in accordance
with the quality and weight of the sewing ma-
terial.
Refer to “6. ATTACHING THE NEEDLE”.
5. Puckering 1 Thread tension is too high. ™ Reduce the thread tension, especially the
looper thread.
Refer to “9. THREAD TENSION”.
2 Timing of the looper thread take-up is
wrong. ™ Set the timing to a little earlier.
Refer to “23. POSITIONING THE LOOPER
THREAD TAKE-UP”.
3 Thread paths are not smooth. ™ Polish the thread path with lapping agent on
thick thread #8.
4 Pressing force of the presser foot is too
much ™ Tighten the adjusting screw.
Refer to “12. ADJUSTING THE PRESSER
FOOT”.
5 Needle ™ Use a fi ner needle.
6 Throat plate. ™ Use a throat plate designed for fi ne materials.
™ Ratio of differential feed; Apply 1:0.7 ratio for
gathering.
6. Puckering 1 Presser foot ™ Use a sliding type presser foot.
Refer to “12. ADJUSTING THE PRESSER
FOOT”.
2 Pressure of presser foot ™ Reduce the pressure.
Refer to “12. ADJUSTING THE PRESSER
FOOT”.