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Janine 634D my serger has started skipping stitches and breaking lower looper thread. any suggestions. Normally is a workhorse. I've cleaned, oiled and changed needle and completely rethreaded.

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  • Sewing Machines Master
  • 9,497 Answers

May need the timing adjusted.

Posted on Apr 23, 2017

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6ya6ya
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Posted on Jan 02, 2017

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MakikiChris
  • 84 Answers

SOURCE: stitch and looper problems

Hi softy...please regain your patience and optimism and I'll do my best to help you correct the issues that are plaguing your serger. It is obvious that you are skilled in your craft and operation of your serger, so I have very little doubt that we have a minute issue that's causing your headaches, so I'd like to begin with the very basics, and as we communicate through our posts we can advance until we resolve your issue. Your confidence tells me that you do not have a threading error, and as you have experienced in the past, thread that lays down while leaving the presser foot commonly indicates improper or no tension on the blades. I have a feeling that you have color coded "marks" on your tension dial's for standard settings per fabric/weight. So let's turn all of your tension dials to maximum. Ensure that your presser foot lever is in the full up position, and lay your thread between the tension discs, of a single tension dial that you want to begin with. After visually verifying that your thread is thoroughly between discs, lower your presser foot, grasp either ends of your thread, and "floss" the tension. Do you feel appropriate resistance being applied on the thread? If yes, repeat the same steps until you have cycled all 4 tensioners. If you did not, or do not feel appropriate tension on any or all of your discs, then the following arm, located in the head, immediately above your presser foot lever has become lodged, and is not releasing. Using lightweight sewing machine oil, apply 1 drop at a time on the following arm, and using your fingers, work at it until it becomes free. If you have determined that you do not have any tension issues...on the serger...not your mind hehe...then open the blade cover. Turn the serger 90 degrees so that you are looking at it from the head facing you. Examine the trueness of your blades, meaning, do any blades look bent either towards the serger or away from the serger? If yes, I'm sure you know what you need to do. However, if they do appear to be true, then get a piece of toilet tissue, and separate it so that it becomes single ply. Place the single ply of tissue on any finger, ensuring that it is smooth and taut, and gently press against your blades and rub them back and forth using slow even strokes. If you felt any resistance, stuttering or tearing of the tissue, repeat again with a new tissue to verify what you had felt. If you did discover any verified flaw using this method..again....you know what you need to do. Please update your post after you have completed these first steps regardless of resolution or not, so that other's with similar issues can gain the information of your experience, and perhaps not have to endure post-tag-you're-it-and-wrong and correct their issues on their own. I will monitor your post, and should we need to advance our troubleshooting, I will update you within 1 day of your follow-up post.....good luck my friend.

Posted on Aug 03, 2007

  • 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

  • 108 Answers

SOURCE: I was wondering if you could help me concerning my

i was able to find manual at www.ifixmachines.com

Posted on Feb 15, 2010

  • 1116 Answers

SOURCE: My serger will only sew a few inches, then the

Been there, done that. Old serger almost went out the window more than once.

Raise the thread antenna and loopers to their highest positions.

Set the tensions to zero. If your serger has auto-tension, raise the presser foot as this also opens the tensions.

Begin threading from the right as indicated in your manual or on the door of the serger.

If this continues, the serger may need to be serviced as the timing could be the problem.

Ask before leaving the serger as the service cost usually starts around $100.

I finally gave in and bought a Babylock with instant jet-air threading.

Posted on Apr 01, 2010

  • 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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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

1 Answer

One of the threads tears?the second one from the right.


Assuming this is a serger. The second thread from the right would be the lower looper. Nine times out of ten, when the looper thread breaks, it's because it is threaded incorrectly or the tension is set too high.

It is generally recommended that when a thread (especially a looper thread) breaks on a serger, you should remove all the threads and start over from the beginning (yep, that sounds painful but it is better to just bite the bullet and just do it rather than fighting it and never getting it threaded right). Make sure the presser foot is raised throughout the threading process, give each thread an extra tug when going through the tension disk to insure it is seated in the disk properly, follow the threading order (usually upper looper first, then lower looper) and the thread pathway is correct for each thread (no guides are skipped and thread is not wrapped around something). The last step of the lower looper threading is to make sure the lower looper thread drapes over the upper looper before being pulled under the presser foot and toward the back of the machine.

Set the tensions to the midway point between high & low numbers before testing.

...

Apr 10, 2016 | Sewing Machines

1 Answer

Bernina 335 serger won't sew/overlock. carefully rethreaded the serger but that hasn't helped.


The 335 has a two thread chain stitch (stitch type 401), and the overlock side (right needle side), is a three thread plain overlock. If you are describing the plain overlock as the problem, I would first suggest the following in re-threading:

1. Thread the upper looper
2. Thread the lower looper
3. Thread the needle last (important)

If the needle threaded, you cannot re-thread the lower looper without breaking the thread.
In order to thread the lower looper, the lower looper must pass by the needle thus picking up the needle thread. So, instead of threading the lower looper thread underneath the needle thread, the looper would be threaded on top and cannot sew without breaking the thread.
Make sure that the threads are bedded between the tension disks. Check this by stretching the thread fore and aft of the tension disks as well as visually noting that the threads are not accidentally threaded behind the disks. You can also loosen the tension disks when threading so as to allow the threads to bed deeply between the disks.
Please reply with your observations.

Sep 27, 2015 | Bernina Sewing Machines

1 Answer

Brother 1034d serger skipping stitches. Stitches are loose even when adjusting the tension.


It appears that there are two issues: skipping stitches, and, loose stitches. Let's deal with them individually but first some general points to check.
1. Change both needles for completely fresh ones out of the package. Make sure that they are inserted all the way up, this is very important. The right needle should appear longer than the left one. Make sure also that you are using the correct needles for your serger.
2. Use a good quality thread with very little stretch, almost no fuzzies, and in pastel colour. Dark thread ages quicker, therefore has a shorter shelf live. A good quality sewing machine thread is also acceptable.
3. Make sure that the tension dials are clean and free of lint or other debris.
4. Re-thread the serger in this order, keeping the presser foot in the down position at all times
a) Upper looper. Ensure that the thread is securely embedded inside the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and place the presser foot down again
b) Lower looper. This is the difficult one to thread but make sure that all the thread guides are properly threaded as well as the upper looper elbow. Check that the thread is lodged between the tension discs. Once the lower looper eye is threaded, place the thread in front and over the upper looper and then under the presser foot to 11:00 o'clock and place the presser foot down again.
c) Right Needle. Thread the right needle path, again ensuring that the thread is between the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and lower the presser foot.
d) Left Needle. Proceed as with left needle.
e) Double check that all tension dials have their respective threads embedded between the discs by pulling firmly up on each thread above the tension dials.
f) Check that the stitch length is set to between 2.5 and 3.0, differential to normal, blade position to middle, blade is engaged, and upper looper converter not in use.
g) Set tensions to recommended setting for 4-thread overlock.
g) Make a test stitch out. How is it? Still having the same issue/s?
If yes, continue with the items listed below, otherwise have a great time serging.

Skipping Stitches:
1. Check that the looper tips are smooth. Burrs will cause problems.
2. Check that the needles match the type of fabric being sewn.

Loose Stitches:
1. Double check threading.
2. Debris caught between tension discs will also manifest itself in loose stitches. Take an 8" X 6" piece of medium weight clean and lint free cotton fabric, fold it in half length-wise and pass the fold only firmly between the tension discs from top to bottom (with the presser foot up and no thread in the tension dials).

Re-thread and test stitch. How is it now?

Sep 30, 2014 | Sewing Machines

1 Answer

WHy is my Husqvarna Viking 560 serger is skipping stitches????


Here are a few things to try.
1. Make sure that correct type of needles are being used, both are the same size, and that the needle size matches the fabric weight. This is the first serger to use 15X1 needles.
2. Make sure that the needles are installed correctly and are pushed all the way up. Have you replaced the old needles with new ones, not other used ones?
3. Thread has a shelf life, it can expire over-night. Just to eliminate this possibility, replace all threads with fresh good quality serging thread (and not just another spool which was purchased some time ago).
4 It sounds like you have re-threaded the serger correctly according to manual instructions. Here is a sure fire method:
- thread the upper looper and place the thread behind the needles under the presser foot. Make sure that the thread is lying firmly between the tension discs.
- thread the lower looper (the tricky one). Check that the thread is between the tension discs as before and place the thread over the upper looper and then behind the needles, and under the presser foot.
- thread the needles, checking that the thread is between the corresponding tension discs. Place the thread under the presser foot.
5. Check stitch length.
6. Check if the problem persists with other fabric types, use two layers. If the problem occurs with only a particular fabric, then the cause is incorrect needles.
7. Check tips on both upper and lower loopers. They should be free of burs, smooth, and have a semi-sharp point.
Hopefully this will solve your problem, if not it may be time to have it inspected by a qualified technician.
Please rate how effective were these suggestion in solving your problem, it is important to me.

May 13, 2014 | Brother XL-2610

1 Answer

Adjusting tension on overlocker


overlockers and sergers are annoying in that every time you change materials and threads they must be re-tensioned.

Get a scrap piece of material. Thread your machine correctly according to the instructions in your manual. If no manual most sergers are threaded, upper looper, lower looper then needles from right to left. Make sure you thread with the presser foot UP.

You want to balance the stitches Begin by adjusting the looper dials, you want them to meet right at the cut edge. Then adjust your needles. Keep doing test seams until you have them balanced. If you are a novice... try threading with each thread point having it's own color. That will help you identify which thread is giving you fits.

Have fun.

Oct 15, 2012 | Janome MyLock 634D Mechanical Sewing...

1 Answer

My Janome 204d Serger won't form a chain stitch. It is threaded correctly. I have changed the needles??


I would suggest that you check the needles again, make sure they are both fully up into the needle housing. Also they should be at different heights in order to form the stitch sequence.

It is important that you thread the loopers first in the sequence shown in your manual, then the needles. So you may need to recheck the threading again and make sure the threads are in all the eyes correctly, especially the lower looper. Also some overlockers, have a sliding eye on the lower looper for ease of threading, if yours does, make sure it has been slid back to normal operating position.

When you have checked the threading up, take all four threads under the raised pressure foot and make sure that the upper looper thread and lower looper threads are not crossing over each other. Lower the pressure foot and try to chain off again.
I hope this helps you to resolve the issue.

Oct 11, 2011 | Janome MyLock 634D Mechanical Sewing...

2 Answers

I own a Bernina 2000DE Serger which I purchased new many years ago. I've never had ANY trouble with it, and am quite experienced with sergers. However, when doing quite a bit of sewing on fleece the last...


Has it been serviced at all during your ownership of the serger?

The loopers can be knocked a little out of timing resulting in the skipped stiches on the heavy weight fleece occassionally. It sounds like you have tried all the usual fixes and know what you are doing.

Only other thing that might cause skipped stitches could be using a sharp needle rather than a ball point on the fleece. Otherwise maybe time for a trip to the shop??

Feb 28, 2011 | Bernina Sewing Machines

2 Answers

Machine is threadedand makes the serger chain for


My janome 634D driving me crazy . I have tread it properly and it wont stitch ?

Nov 06, 2009 | Janome MyLock 634D Mechanical Sewing...

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