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Juki mo-644D lower looper adjustment?

Overlock 2 needle, the bottom looper broke, got new one , replaced it and the machine is not working correctly since, making no loops and is sounding loud

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William Gilbert

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  • Juki Master
  • 470 Answers

Here is your Manual:

JUKI MO 644D Instruction Manual

Posted on Feb 15, 2015

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5 Related Answers

Anonymous

  • 87 Answers

SOURCE: timing on a Huskylock 535D surger

the eyes of the needles must line up with lower looper as they pass (timing) the distance between the needle and the looper must be exact. No distance between them and not touching. yep, that tight. they shouldnt move the needle even the slightest amount as they pass each other, yet no space between them.
Kent

Posted on Mar 19, 2009

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Anonymous

  • 1 Answer

SOURCE: thread continually breaking in lower looper needle

I was having this very same problem with my lower looper . I had been using the one needle stitching all afternoon and I was doing quite nice stitching. then I decided to put the right needle back in and do some overlock stitching and guess what I spent the next two hours fighting the looper problem. I had completely re-thread this machine at least 20 times now. I decided to take the needle out and re-insert it and re-thread it one more time (right lower looper- then upper looper- right needle- then left needle) was careful to pull all threads to the back and under the presser foot for about 6 inches.
Held on to the thread, lowered presser foot and did the chaining stitch. BINGO it didn't break, tried it with a piece of cloth and Perfect stitches. I have a Babylock BL402 and used tension settings left to right
4-3-3-3 and default settings for the rest.
Hope this helps someone someday.
Jo Griffith

Posted on Mar 29, 2009

Anonymous

  • 108 Answers

SOURCE: where can i find free instruction manual for JUKI

try at www.ifixmachines.com

Posted on Feb 15, 2010

trial2962

Val

  • 107 Answers

SOURCE: JUKI Garnet Line MO - 644D - How to thread ?

You might try on eBay items like 160431427159

Posted on May 05, 2010

Anonymous

  • 1116 Answers

SOURCE: Serger stitch not forming right

It sounds like the timing needs to be reset by a sewing machine repair tech.

Posted on May 09, 2010

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1answer

BLADES DON'T MEET ON OVERLOCKER

hi there
please see link to download user manual for JUKI MO-644D
http://www.juki.pl/support/HSM/Manuals/MO-654DE_manual_UK.pdf
and you must made upper and lower knife very close to cut material correctly.
regards
ASHRAF
CAIRO - EGYPT
[email protected]
1helpful
1answer

Correct threading for 4 th. Juki ind. overlocker

Overlockers and or Sergers are ALWAYS threaded the same way. Upper looper, Lower looper, right needle, left needle. If you have a model number for your Juki we might be able to find you more information.

The best way to figure out tension problems is to thread each thread in a different color so you can determine which thread is giving you problems.

These machines can be frustrating and EVERY time the thread breaks you MUST start the threading problem from the beginning... upper looper, lower looper, right needle left needle.
0helpful
1answer

The right hand needle on my Juki MO-634DE keeps breaking. I ensure that it is inserted correctly - any ideas?

I would suggest rethreading that one section, then check the tension to make sure it's correct for the
fabric,
also check to see what the needle it hitting to break it, if it's hitting the loopers or the needle plate area
then it's possible it could be out of time, then it would have to be serviced
2helpful
1answer

Tension settings juki mo-644d

-If the machine is threaded correctly and the thread is flossed into the tension discs,
-if the thread is high quality and not cheap thred
the top tensions should be at 5-6 and the looper tensions should be at 4-5
Be sure it is threaded correctly (follow the threading map on the inside of the front cover of machine
Also be sure you are using a size 14 or size 90 standard Schmetz needle do not use Klasse needles
as these are to short and affecdt the timing.
drtension
1helpful
1answer

JUKI MO 134 SERGER

How to Thread Juki MO-134 Serger from watching lady at Lyles. Turn upper blade up. Push in first then turn up.It makes threading easier. Blue Thread upper looper first. Pull thread through tension knob. Don'tjust lay it there. (She thought that is what I must have done) Orange Thread lower looper next. Pull thread through tension knob as inthreading upper looper. Adjust lower looper so it is right nextto upper looper so that their points are almost together and directly belowsewing needles. Lower looper will be in front of upper looper (I believe). With tread from upper looper pulledback, slightly lift lower looper above upper looper and thread. I think this isright. Pull thread back with other thread. Tension is the key. Remember that. Yellow: Thread left needle first.Remember tension. Pull thread through curled wire on left side of needle arm. Green: Thread right needle. Rememberabout tension. Pull thread through curled wire on right side of needle arm. b> Note: Before sewing turn the wheel tomake sure the stitches are going together correctly.
0helpful
1answer

How can I use this machine as a MERROW machine ?

For best results, use Maxi-Lock cone thread.
Remove the left needle.
Slide the stitch forming finger towards you, away from where the stitch forms.
Set the stitch length to around 1.
Set the needle tension 4 or 5.
Set the upper looper tension at 4.
Set the lower looper tension at 7.
Adjust the stitch width, if needed.
0helpful
1answer
2helpful
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THREADING FOR JUKI MO 357

Put new needles in it.

Following the colors, thread the upper looper first, then the lower looper. Next thread the needles. Always thread in this order.


0helpful
2answers

2nd needle/4th thread - threading confusion

With some sergers, but not many (singer 14u64 comes to mind), the top of the stitch will be an overedge that mates with the right needle thread, and the left needle thread will appear as a separate straight stitch. When you look at the underside of the stitch, the overedge will go all the way over to the left needle (the full width of the stitch). This is normal if you have this type of machine. Another stitch some sergers do (2/4 thread sergers) is a 2 thread chain thal looks like a lone straight stitch on both sides, and a 2 thread separate overedge.

As far as the threading of the takeup, it totally depends on your model. Always post your model number when you have questions as sergers vary greatly in design.
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