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Janome mb4 why does thread ravel whiles embroidery a project

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  • Janome Master
  • 7,365 Answers

Check for burrs on the needle plate and in the bobbin area
also check for burrs in the threading area,like one of the thread guides

Posted on Oct 16, 2013

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Posted on Jan 02, 2017

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SOURCE: Machine embroidery

You should always use proper Bobbin Thread for embroidery - not a bobbin wound from regular dressmaking thread. You are right, the special bobbin thread is thinner so that the embroidery thread will be pulled to the underside and you get a nice shiny embroidery on top with no bobbin showing through. Wind yourself 6 or more bobbins at a time of bobbin thread to always have some on hand, or buy the pre-wound L size ones.
All embroidery machines - no matter what brand - recommend using bobbin thread for embroidery. It is readily available at all sewing stores, probably even Spotlight would carry some. If you get stuck for a supply, try overlocker thread.

Posted on Dec 22, 2007

  • 1 Answer

SOURCE: Bernina Aurora 430

I figured out the solution for this issue. It all has to do with the threading. And I mean literally follow the instructions word for word. Most importantly is the Bobbin thread. make sure to thread the bobbin through the case eyelet.

Posted on Mar 29, 2008

  • 323 Answers

SOURCE: janome mb4

Loud chirping noises indicate a need for lubrication or something is rubbing against your carriage.
sewman7

Posted on May 19, 2008

bargainbox
  • 1388 Answers

SOURCE: embroidery machine janome 300.

Please TRY the solution BEFORE giving your considered rating.

Ensure that all is clean and free of lint and jams, this is the most likely cause....now for tension troubleshooting .......

This solution is for tension problems...if you cannot form any sort of stitch, the issue is quite different, so please let me know if you need a different problem solved.....

It is quite long, but just work through each section in order.
The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.

QUICK SUMMARY FIRST:
Ensure sharp new needle, 
Thread guides and Bobbin are Clean & Clear of lint
Set Top Tesion to 3 ....then....
Balance Bobbin to suit.

TOP THREAD TENSION:
If the looping threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your 
projects). 

IS YOUR NEEDLE SHARP ?
If you are using a needle that has seen quite a deal of work, or you suspect it may be blunt, change it for a new one !

TOP TENSION & GUIDES:
Make sure that when you thread the machine the presser foot is up so the thread goes between the discs and not to one side, top tension between 4 and 6, and that you have threaded through all the guides, including the last one, usually on the needle arm, just above the needle clamp.

It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.

If tensions appear correct, and the thread is definitely in the channel between the discs, but still too loose and looping, try raising presser foot and remove your thread.

Now, with a 2" (50mm) wide strip piece of fabric 8 - 10" (20 - 25cm) moistened with methylated or denatured spirit, gently insert the fabric strip and clean between the discs with a see saw / to and fro action.

In the worst cases, gentle use of a needle to pick & remove the jam may be necessary, but be very gentle and make sure the tension is set at Zero and the presser foot is raised, (to disengage tension plates).... do not gouge or score the plates, they need a polished surface to work correctly.

BOBBIN TENSION:
Far less common, but if the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension. 

I would not recommend fiddling with bobbin tension without good reason, it may end up with missing small screws and spring pieces, however, you can take the needle plate off to clean the hook race area (where bobbin case sits) 

...this is just good housekeeping, my wife does this every time she replaces the bobbin....

just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint. If there is a significant amount of lint, use a vacuum and small brush to get the worst.

Then wipe all this area with a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit, especially if there appears to be fine dirty deposits....oil and lint combine to conspire against you.

If it seems likely that you ......really ....do .....actually .....need .....to adjust the bobbin case, first check there is no lint trapped in the metal spring where the thread is tensioned. 

TOP LOADER:
Drop-in Bobbin case will look similar to this image with the tension screw in the middle of the metalwork....

4c76dc1.jpg ...the other screw at one end is holding it all together, so beware....it is not a tragedy to undo the whole lot and clean it, but very gingerly and lay the bits out in sequence and orientation, or you risk tearing your hair out !
FINISHING UP
GETTING THE BALANCE RIGHT:
When you are certain there's no trapped lint in top tension or bobbin, set the top tension to 4 and the bobbin tension to a point where you just begin to feel resistance.

Try using good quality thread of contrasting colours so you can more easily spot the changes.

Sew a sample for a few inches and check the result.... adjust the bobbin tension screw very little at 
a time, perhaps 1/16 of a turn.

You may find you are playing with this balance for some little while and if you are putting the needleplate on and off each time begin to think it cannot be correct to do this.....BUT....it is, 
and eventually, you do get a "feel" for the correct tension and then it happens quite quickly.....as a user you won't be doing it very often unless there is lint built up (or are there small hands at work around the house !?!?!)

OTHER ISSUES:
If you live near the ocean as we do, salt air can play havoc with metalwork inside and out, so to help minimise this, keep a few small packets of dessicant (silica gel) in your machine 
case....no case ? then make some sort of cover ! 

Same applies in any damp or humid environment, keep your machine dry and dust free.

Budget for a proper full service every couple of years (more often if heavily used) and if you don't use your machine for a few years, be aware that old oil will dry out and combining with 
dust and form a "clag" like glue (another reason for some sort of cover, even a teatowel !)

FINALLY, A WORD ON THREAD:
If it is worth spending the time, energy and money on making something that you would like to give lasting enjoyment......use quality thread, .......it may seem to cost a little more at the 
time, but the results, ease of use and added longevity will be worth the extra, and as a bonus, your tension troubles may be fewer and further between, because there is a more consistent diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !
 
 
 
 

Posted on Dec 28, 2008

SOURCE: Thread is knotting up on bottom of fabric causing it to stop

1.check the needle & see if it's bent--if so replace
2.lay the needle on a flat surface & roll the needle over if it doesn't roll true replace
3.check for blunt needle-if needle makes a popping sound when needle penetrates fabric
4.needle is not all way up in holder
on my mechanical sewing machine sometimes the threads come off the take up lever, that causes the thread to bunch up under something I'm working on
also check thread in bobbin

Posted on Jul 29, 2010

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1 Answer

Why does my Janome mb4 keeps shredding its top thread?


Change your needle and if it continues to happen, change the thread. Most likely your needle and thread are not compatible, ie the thread is too large for the needle's eye. Also, inexpensive thread will shred.

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Sep 05, 2015 | Janome MB4 Four Needle Embroidery Machine

1 Answer

Tengo problemas con maquina de bordar janome mb4, me distorciona el bordado. I have problems with mb4 janome embroidery machine, embroidery distorts.


If your embroidery is distorted be sure you are using the right stabilizer for the fabric you are doing the embroidery on and enough for the density of the design.

I hope that helps.

Dec 04, 2014 | Janome MB4 Four Needle Embroidery Machine

1 Answer

How do I fix my MB4 that has locked after thread caught around bobbin. There must still be hidden thread, how can I fix please, regards Pam


IF THE GEARS ARE PLASTIC, THE LOCKING MAY HAVE CAUSED THE GEARS TO JUMP A TOOTH AND THREW THE TIMING OF THE MACHINE OFF. IT MAY NEED TO BE SERVICED.

Nov 20, 2014 | Janome MB4 Four Needle Embroidery Machine

2 Answers

Janome mb4


I suggest you call a Janome dealer and ask them your question.

Sep 02, 2014 | Janome MB4 Four Needle Embroidery Machine

2 Answers

Janome mb4


are you using a good thread and the same thread on the top and in the bobbin, different threads will sometimes act up. I also can not sew one brand of thread on my machine, try Mettler or gutermann's you can get them at JoAnn's or Fabricland. hope it helps good luck K

Sep 23, 2017 | Janome MB4 Four Needle Embroidery Machine

1 Answer

Why does my Janome MB4 Jump in mid pattern and finishe 1" up or down?


This is usually caused by the y axis movement system. Occasionally this system can come out of sync, and cause the issue you described. Your y axis pulse motor may be going bad as well. In either case it would be best to take your machine to a Janome dealer for repair.

May 04, 2014 | Janome MB4 Four Needle Embroidery Machine

1 Answer

Janometroubleshooting


checks that the strip wire and strip wire sensor, this worked well.
(the strip threads is the small spring by which you spend the thread to thread)

janometroubleshooting-4xjkfet12npqlrxk22kphdrl-5-0.png

Jan 04, 2014 | Janome MB4 Four Needle Embroidery Machine

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