Question about Baby Lock Sewing Machines

1 Answer

Thread tension on a Baby Lock BL90

For some reason the bottom looper thread keeps breaking and thread bunches up and it doesn't feed the fabric thru.

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  • also back the thread tension off one number or letter at a time and see if that helps,,when using new needles make sure they go all the way into the needle holder and they are turned the right way,,make sure the thread is feeding off the cone or spool freely,,use the right size needle for the fabric being sewed..

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  • Baby Lock Master
  • 7,365 Answers

I suggest changing both needles
and rethreading the machine
use a can of air that is used for computer keyboards on the inside
here's a link for parts to the machine and also has a manual
the manual should have information about the thread tension
http://www.sewingpartsonline.com/babylock-BL90-serger-machine-parts.aspx

Posted on Nov 02, 2012

  • dhuffman53
    dhuffman53 Nov 02, 2012

    Thank you for your suggestions. I have ordered the manual and I will try your suggested steps later today.

  • you might also check for burrs on the needle plate and on the loopers themselves

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6 Suggested Answers

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Posted on Jan 02, 2017

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bargainbox
  • 1388 Answers

SOURCE: Thread bunches on bottom of fabric

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 4 ....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.

Set your zigzag to one width less than maximum (eg. 5 of 6 ...or... 4 of 5 etc) and 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 consistant diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !

If you want any more help with this, just post back here, or, drop a line through the "Contact Us" page at

www.bargainbox.com.au

Posted on May 10, 2008

  • 1 Answer

SOURCE: Baby Lock Serger Thread keeps breaking

Mmmm...., maybe NOT the solution, maybe, just a key.

I have a copy of theBaby LKock EA-605 instruction booklet in English, Germann, French and Spanish. NO ideas how it casme into my orbit, but happy to pass it on.

Posted on Mar 06, 2009

  • 1 Answer

SOURCE: Bicor vx1005 ...thread keeps bunching

Try a different bobbin. Look for one that is a little narrower. I had the same problem and changing to a narrower bobbin fixed it.

Posted on Mar 29, 2009

  • 9 Answers

SOURCE: the tension is off ?? bottom thread bunches

Sounds like it could be! Probably worth trying to readjust it. Are you using a fine fabric too? That can cause bunching.

Posted on Apr 06, 2010

  • 1 Answer

SOURCE: Bicor vx1005 ...thread keeps bunching

Make sure that you have the top thread in all the correct positions. I missed two and had the same problem. When I rethreaded it my problem was solved.

Posted on Sep 06, 2010

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1 Answer

I have a white speed lock 234 serger and cannot get it to chain off. The thread bunches together


Yes, thread the upper looper first, the lower looper next.

***Make sure that you have the presser foot RAISED during the ENTIRE threading process until you get to the point of threading the needles.

The second to last step in the lower looper process is to make sure lower looper thread DRAPES over the top of the upper looper & thread, then both thread tails get pulled under the presser foot and toward the back of the machine.

Give each thread a little extra tug as it goes through the tension disk to make sure it is seated. Verify that all the threading steps have been followed. Any skipped steps, extra thread wraps, or incorrect threading will most likely cause a problem.

Make sure you have brand new needles before threading. If one is bent or damaged, you will probably have issues with skipped stitches.

Set all the tensions to the midway point (the factory standard for regular chain stitch). The tensions can then be tweaked when the machine is correctly creating a chain.

If the machine messes up, breaks a thread, comes unthreaded, etc., save yourself some time and frustration and RETHREAD everything from the beginning. Trying to rethread out of order usually fails!!!

Once you are more comfortable with your machine, you can try fishing a thread, but even experienced serger users still have trouble with this.

...

Aug 03, 2016 | Sewing Machines

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PRO LINE BABY LOCK SERGER, BOTTOM LOOP TOO LOOSE.


Make sure the lower looper thread is seated properly in the tension disk. (RAISE the presser foot. Grasp the thread between the thread tree and the tension disk and with the other hand, grasp the thread below the tension disk and give a little tug.) When threading, always RAISE the presser foot so the tension disks are released.

If the lower looper thread is still too loose, set it to a tighter setting until it creates the stitch you want.

....

Feb 27, 2016 | Baby Lock Sewing Machines

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My top thread keeps catching and bunching up under the needle plate.


  • Raise presser foot when upper threading.
  • Thread normally through all guides
  • Lower presser foot
  • Thread needle, leaving a 6" thread tail
  • Raise foot and gently pull thread (no tension)
  • Lower foot & gently pull thread (you'll feel resistance)
  • Delint upper tension with Compressed Dry Canned Lint Remover ie: Computer Quality. Be sure no thread is in machine and foot is up so tension is released
Nancy Notions Trusted by sewing enthusiasts for more than 3 decades

Jul 13, 2015 | Baby Lock Ellure

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Janome 9200d HAVING PROBLEMS SETTING TENSION. PUT SETTING AT 3 AS RECOMMENDED BUT THE LOWER LOOPER KEEPS SNAPPING.


I presume you mean that the lower looper thread is breaking; are you sure that the thread is not snagging somewhere on the aerial, on the thread stand or on one of the thread guides? Is the aerial fully extended? You need the clearance so the thread can flow off the cones quickly.

Also, some overlockers have a little slide device on the lower looper to make threading up easier, you slide it over to access the thread guide, then slide it back into position to stitch. Is yours like this; and if so, is it back into the right position.

If you are absolutely certain that your threading up is correct then I'd be looking at the tension dial on the lower looper. Give it a clean, reseat the thread into it, and test if it is tensioning correctly. Pull the thread from below the tension on 3, then turn up to 5 or 6, does it feel significantly tighter to pull? Turn down to zero, does it pull through easily?.

If the above doesn't resolve the issue, then perhaps time for a professional service, perhaps the tension device is faulting or the timing is slightly out.

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this is a top thread tension problem . make shure thread is between tension plates and spring is contacting the plate if the tension number is high

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bottom thread bunching up is actually the needle thread having no tension. Most likely the upper threading is wrong...

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Mmmm...., maybe NOT the solution, maybe, just a key.

I have a copy of theBaby LKock EA-605 instruction booklet in English, Germann, French and Spanish. NO ideas how it casme into my orbit, but happy to pass it on.

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Baby Lock Protege BL5370Ed Serger


I was in a similar position (but had the manual). The manual isn't as complete as I'd like. Anyway, what finally got mine working were the following:
1. turn all tensions to zero before putting thread through them
2. thread the upper looper, then lower looper, then needles.
3. when threading the lower looper (mine kept pulling out), after passing the thread through the looper eye, it needs to go pretty much straight up, not wrapping around anything else - other thread, for example. Mine was at one point trying to wrap itself around a post.
4.when everything is all threaded up, make sure all threads are under the foot *and* pulled to the left (even though the manual says pull to the back). Then chain off without fabric, turning the handwheel by hand to make sure loops are forming. If so, adjust tensions to where you think they should be (mine are currently all between 2 and 5), and add fabric. Then tweak as needed.

For me, this was a lot of trial & error, hair-pulling, and getting tips 1, 2, and 4. I figured out #3 on my own, with much swearing along the way. Good luck!

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