Question about Janome L-344 Mechanical Sewing Machine

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L-344 loose stiching

Machine is threaded properly. Proper needle for cotton is being used. Same thread is being used both on the top and in the bobbin. Bobbin is threaded proprerly. Tension dial is currently set on 3...but the stiches are loose no matter what the tension is. No matter how high or how low, the stiches remain so loose they can be pulled from the fabric without effort. I am stumped. Any ideas?

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  • Anonymous Mar 26, 2014

    can't get top tension to normal...too loose no matter what number I use

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  • 323 Answers

You need to do a tension assembly test. Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Tension assembly test. To do this test. Pull the thread through the tension assembly and test it to make sure the tension is working correctly.
(To do this test, adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.)
If it doesn’t work this way then you probably have a piece of thread or lint stuck inside the tension discs. To remove it, turn the tension to 0 zero and raise the presser foot.Using a small screwdriver, open the space between the discs and spray with canned or compressed air. The stuff should come out. Do the tension test again to make sure you got everything and then try sewing again.
sewman7

Posted on Dec 24, 2008

  • John Free Dec 24, 2008

    You need to do a tension assembly test.






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    Tension assembly test. To do this test. Pull the thread
    through the tension assembly and test it to make sure the tension is working
    correctly.

    (To do this test, adjust your tension setting to normal or medium or 5 or
    something in the middle. Raise the presser foot and pull the thread through the
    tension. It should pull easily!! Lower the presser foot and pull the thread. It
    should pull noticeably harder.)


    If it doesn’t work this way then you probably have a piece
    of thread or lint stuck inside the tension discs. To remove it, turn the
    tension to 0 zero and raise the presser foot.Using a small screwdriver, open
    the space between the discs and spray with canned or compressed air. The stuff
    should come out. Do the tension test again to make sure you got everything and
    then try sewing again.
    sewman7



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Posted on Jan 02, 2017

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The upper thread keeps breaking whenever I sew even though it is always properly threaded and the needle is fine


check the age of the cotton
cotton is not a single thread but a series of fine threads bonded with a glue
old cotton glue breaks down and the thread separates easilty
next check that the needle is installed correctly with the grove ( thread groove away from the bobbin hook
check the needle and hook timing because if it is off a fraction , the hook will pierce the the thread causing it to break
next check that the eye is the correct size for the thread in use
a needle eye too small for the thread thickness will jam the thread ans not let slide through the eye properly

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Install a brand new needle and confirm it is inserted with the flat side facing the proper direction.. A bent, damaged needle will sometimes cause skipped stitches or even needle strikes inside the machine. A new needle is the least expensive cure for a lot of sewing machine problems. The needle should be changed about every 8 hours of sewing or at least when starting a new project.

Remove the top thread. ALWAYS RAISE the presser foot and rethread from the beginning. Verify the thread path is correct.

Sometimes, skipped stitches will occur if the needle, thread, and fabric are incompatible. Be sure to use the correct needle for your project. Use a good quality thread--AVOID old or bargain bin thread!

If the machine continues to skip stitches, then it may be out of time. Search for sewing machine timing or take it for service.

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You might try cleaning the tension disks by dampening a length of pearl cotton with rubbing alcohol, open the tension disk all the way, raise the presser foot, and then pull the pearl cotton down between the disks a couple of times.

Clean away the lint and thread pieces from the feed dogs and bobbin area. Oil your machine according to the instruction manual--use only fresh good quality sewing machine oil--only 1 or 2 drops of oil each place.

Install a brand new needle. Make sure you are using a needle and thread that are compatible with the fabric you are sewing--that the thread is not too big for the needle's eye, etc.
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Make sure you RAISE the presser foot BEFORE threading the upper thread. Rethread the thread from the beginning checking that thread is not wrapping around the spool pin or catching somewhere in the threading sequence.

Verify that you are threading the machine correctly. Misthreading will cause havoc and frustration!

Do not use old or bargain bin thread--Coats & Clark does create problems for some machines.

You might try pulling the bobbin thread to the top before beginning to sew. This helps prevent some of the thread nests you are experiencing.
How and Why to Bring up the Bobbin Thread

The factory tension setting is usually the halfway point between the high and low number. This is where you should start testing your tension. Once you sew a sample, if the top thread is looping/knotting (bird nesting) under the fabric, the upper tension is most likely too loose. If the bobbin thread is pulling to the top of the fabric, the upper tension is too tight. Get used to adjusting the upper tension every time you change fabric, needle, thread. The upper tension is not meant to be static, so don't be afraid to adjust to achieve the proper tension.

Ideal tension is when both the upper thread and bobbin thread meet in the middle of the fabric.

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I cannot get the tension to set correctly on my Singer 6268 sewing machine. For instance, I'm using red thread on top spool and white in the bobbin. Suddenly, as it always does, the thread is loos


I have solved my tension problems by going to threadmagazine.com. they have solutions to many, many problems you have with your sewing machine. Hope this helps. jdokos95

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Do you have thread in your bobbin?
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Is your needle damaged, bent or dull?

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The key to proper stitches is that tension on the bobbin must equal the tension on the upper thread spool as well. The bobbin has a tension screw that may have come loose or the thread is not properly in the tensioner. For example, the bobbin could be in backwards. Or the tension of the top could be too light and allowing the tension on the bottom to pull the thread down too much.
Open the bobbin tray and watch while you slowly rotate the hand control to see it make a stitch.
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My sewing machine is not working properly - i think i have loaded the bobbin correctly but after about 3 stiches the cotton all jams - what have i done wrong - it is not a new machine I have used it before...


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Proper set of bobbins and tension set up vs. fabrics will sew you satified.Also incude regular maintenance cleaning of the feeds dogs with a brus,also the shuttle assembly need sometime to clean.Some threads and fabrics chips accumulates in the feed dogs and shuttles assembly.In setting up thread bobbins the thread should be clockwise direction as you pull out on slot coming out to the bobbins (as you shown in my inserted image manual).The loop thread should be propely in the sequence position same like in the image refer to it.If you use cotton/ polyester fabric in the begining of trial set tension dial to No.3 and stich to No. 8 to 12 any convenient to you Use needle No. 14 .Posible make a record if you are sewing different types of fabric mostly silk fabric is hard to sew adjusting to lower stich can posible sew satisfactory.

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This may be of help:

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Even though your machine is probably a different model, machines generally thread the same.

Something that may help is ALWAYS RAISE the presser foot when threading the top thread. This allows the thread to seat fully in the tension disk and helps eliminate those loose threads under the fabric.

If the bobbin thread still just lays on the fabric, the top tension is too loose. Tighten the top thread tension so it will pull the bobbin thread up into the fabric. Tension is a tug-of-war between the top and bobbin threads. Neither should win nor lose. Tension is accurate when both threads meet in the middle of the fabric. Also, keep in mind that tension is not static, ie it will most likely need to be adjusted whenever you begin a new project because the thread, fabric, needle, and stitch selection can change the tension.
http://www.threadsmagazine.com/2008/11/02/understanding-thread-tension

You shouldn't need a separate spool for the top thread if your machine has the vertical spool pin. Most spools will work unless you are trying to use the huge spools that are made for sergers. In that case, you can wind thread onto a bobbin and then use the loaded bobbin as your top thread--in effect, you would wind 2 bobbins, one for the bobbin thread and one for the top thread. If my thread spools are taller than the spool pin (causing the spool to flop around when I stitch), I simply slip a plastic drink straw over the spool pin and, Voila!, the spool pin is taller than the thread spool.

Another helpful hint: AVOID using old or bargain bin threads. Quality thread will limit a lot of sewing problems and frustration.

Install a brand new needle every 8 hours of sewing time. Frequently, problems are a result of using old, damaged, or dull needles. When having problems, the first course of action is replace the needle. A lot of time can be spent trying to find resolutions to a problem when a brand new needle is all that's needed. If you hear the needle strike something strange, it's probably best to replace the needle as it has probably been damaged or bent. A hard strike of the needle can knock the machine out of time which would require a visit to the service repairman.

Second step to problem resolution--rethread the machine. Remove the thread completely from the machine and start over from the beginning. Verify the thread path is correct.

Also, using the correct needle type and size for the project is important. Don't use needles whose eyes are either too small or too large for the thread. Use a needle made for the type of fabric and project. Use embroidery needles when embroidering, use ball point needles for knits, use sharps (universal, microtex...) for woven fabrics, leather needles for leather, denim needles for denim/heavy fabric, etc.
https://www.schmetzneedles.com/all-about-needles/

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