Question about Juki MO-644D Mechanical Sewing Machine

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Tension is off on my Juki MO-6700 series industrial serger

I've already re-threaded and even put on new spools of thread. I have adjusted the thread dials, but they continue to pull to the underside of the fabric, sometimes not catching the bottom back thread.

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SOURCE: Need a "How to Guide"

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Posted on Jul 24, 2009

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  • 13 Answers

SOURCE: I have a juki mo-3614

first, pull out the bvlades and make surte they are sharp. It could simply be that they are dull. Next, line tyhe bottom blade up level to the surface of the needle plate. The top blade should be adjusted to where it slices against the botom blade. You may have to experiment with the height adjustment on the top blade, assuming you have a suitable cutting edge.

Posted on Dec 15, 2008

Mongo32
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SOURCE: I bought a second hand Juki industrial machine ,

upper tension sets the lower thread tension (upper thread is what you see on the underside of the fabric). Bobbin tension is for the thread you see on the top of the fabric

Posted on Jul 08, 2009

  • 14 Answers

SOURCE: Looking for JUKI MOR-816 Instruction Manual

http://www.raichert.com/adobe/MO804-12-16%20Inst.pdf

Posted on Dec 14, 2009

trial2962
  • 107 Answers

SOURCE: looking for an online manual for my Juki serger MO-634DE

Try eBay item #160431427159

Posted on May 19, 2010

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1 Answer

How to thread a juki MO-352 sub class 17 serger


There are a lot of questions on the industrial sergers. The problem is, they are all just different enough, that I can't answer your question directly. You can try this website: http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Juki_Sewing_machine_threading/Juki_MO_2504_2514_2516_Threading_Diagram.htm
on a similar machine, or find your nearest industrial machine dealer and ask them how to thread it.

Mar 03, 2015 | Juki Sewing Machines

1 Answer

Juki Serger - MO-50e thread will not move out of the machine and continues to tangle under the needles. Please help! The machine worked beautifully for a few hours and now it is a really expensive p


I have had this happen, check your tension on that thread and check the thread thickness. Tofix mine I recall changing both,and I think it was the thread thickness in relation to the tension

Oct 29, 2014 | Juki America, Inc Juki MO-50E 3/4 Thread...

2 Answers

I have a brand new Juki MO-50e and the threads are loose on the back of the fabric, how do I fix this?


  1. . re-thread your machine with a rainbow of colors. (important that you remove the existing threads if you are not sure it is threaded properly.) make sure you are lifting the presser foot while rethreading.
  2. Sew a good 6 inches.
  3. Look to see which threads are the offenders and tighten the co-responding tension knobs a little.
  4. Sew another 6 inches. Examine the result. Adjust tension again if needed.
  5. Work this way until you have the stitch balanced.
  6. Finally when your stitches are perfect. clip the threads at the spools in back. And tie on the coordinating colored thread for your fabric.
Get used to this procedure since it is common to have to adjust tensions when you change fabric. Good luck!

Oct 23, 2014 | Juki MO-644D Mechanical Sewing Machine

1 Answer

Bottom thread on Juki DDL-5550 is coming up. Top thread seems to lie flat


Check your upper thread at the spool. I've had industrial machines randomly throw a loop around the spool holder spindle which is hidden under the spool itself.

Also check your threading guide to be absolutely certain you are threading it correctly. Also make sure needle/thread diameter are suitable for each other.

Good luck.

Dec 02, 2012 | Sewing Machines

1 Answer

Where can I get a manual for bernette fun lock 006D


Serger manuals for early machines are really basic.

Thread in order.

upper looper, lower looper, right needle, left needle. (see the inside of the looper cover door.)

Adjust tensions to suit the fabric you are sewing.

If you need to change colors clip threads near the spools and tie on new spools to previous threads and draw threads through an already threaded machine.

Bernina is the brand. But I believe early models of the serger were made by Juki. I've looked for the manual for 006 as well and found thinging. Your only other choice is find someone who has one for sale and ask for a scanned copy.... or order a new one from Bernina or one of the other places that has one.

Aug 06, 2012 | Baby Lock Sewing Machines

1 Answer

I want to adjust my serger yuki mo 2516n but i don't still have it's manual instructions


if you go to this page http://www.juki.co.jp/household_en/serger/index.html there are the current household sergers from Juki and a four page threading diagram for them showing the different stitch set ups.

If your serger is a domestic one too (the MO in front makes me think so) then you may find that the threading up is very similar on your model. Stitch length is usually a kob on the right marked from 0.5 to 4 and differential feed knob is usually there too, usually marked from -0.5 up to 1.5. Tension settings are usually around 5 but you adjust the looper tensions to suit the fabric and how wide you are trimming it with the blades.

You could contact Juki or their local distributor in your country and arrange to purchase manual for your model. http://www.juki.co.jp/household_en/dl/index.html this page gives a listing for countries.

it is also available on line to purchase as a black and white pdf file, http://www.sewusa.com/Sewing_Machine_Manuals/Juki_Manuals/Juki_Industrial_Sewing_Machine_Manuals/MO-2500_Instruction_Manual.htm for $8USD

Jun 20, 2011 | Sewing Machines

1 Answer

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.

Apr 16, 2010 | Juki MO-644D Mechanical Sewing Machine

1 Answer

Do you have a quick threading guide for this


Could not find. Here is one for the 634 that may help - http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Juki_Sewing_machine_threading/Juki_MO_634_Threading_Diagram.htm

Raise the thread antenna and loopers to their highest position.

Set the tension controls to zero before threading.

Many sergers have the threading diagram inside the front door of the serger.

Apr 01, 2010 | Juki MO-654DE Mechanical Sewing Machine

1 Answer

Need instructions for threading Juki MO 3314


Open the font of the serger and the instructions will be printed on the serger or on the door.

Raise the presser foot and set the tensions to zero when threading.

Turn the hand wheel so the upper looper (curved one) is at it's highest point and thread it first, and then the lower looper.

With some sergers you must thread in a certain sequence. This should be indicated in the instructions on the serger.

Set the tensions back to normal ( 4 - 6), lower the presser foot and run a length of stitching to see if the threads are knitted together as they should before you start serging your project.

Feb 19, 2010 | Juki MO-734DE Mechanical Sewing Machine

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