Question about Janome 4623 Mechanical Sewing Machine

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I have a janome 360 machine, The thread keeps knotting up underneath, I have put in a new needle and cleaned the bobbin area but it still keeps on knotting up.

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6ya6ya
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Posted on Jan 02, 2017

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  • 399 Answers

SOURCE: I have a Brother SE-270D

its the problem of the timing belt in your machine its extra loosen or extra tightned or is slightly came out of its position or finally broken.
as the machine is proper just missing the proper speed as it should be .
it is running continuosly as you stated.
check the timing belt and make it proper if its worn out and needs replacement this is how its done

There is an adjusting screw on the right side of the machine head. Follow the motor bracket to the machine head and loosen that big old screw or bolt which will raise or lower the motor giving you slack to remove or replace the belt.

feel free for further queries
thanks

Posted on Sep 19, 2008

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kent581
  • 87 Answers

SOURCE: Upper thread knots up with bobbin thread when sewing a stich

Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.

Posted on Mar 18, 2009

  • 201 Answers

SOURCE: needles keep breaking & bobbing wont feed thru

First try taking your bobbin case right out of the machine (not sure if this model has a top loading or front loading bobbin, but your manual will help you here) and floss out the tension slot with a piece of strong thread. Don't use waxed dental floss, but non-waxed would work okay. (The bobbin case is the piece that the bobbin sits in.) Look around while you have the machine open and remove any fluff and thread you can see - TURN MACHINE OFF BEFORE DOING THIS! Replace bobbin case. Replace bobbin and make sure it "clicks" into the tension slot.

Then unthread the top of the machine, clean the tension disks by passing a folded dollar bill (or any paper money, depends on what country you are in) through the disks in the direction you thread the machine. Do this several times. Re-thread making sure you follow the correct thread path.

Make sure the needle plate is on firmly.

If after all that it still won't work, I'm sorry to say that it sounds like you have a misaligned needle bar. This commonly happens after you have a major thread snaffoo and needle breakage. The needle gets caught in the thread knot, pulls to the side and breaks but if it gets seriously caught it can pull the needle bar out of place. You cannot put the needle bar back in place yourself - it's a job for the workshop. Don't sew on your machine until it is fixed. The noise you are hearing is likely to be the needle striking against the needle plate or even the bobbin. Your timing will probably need re-setting too and this needs to be done by a qualified technician.

If you really need to sew before you can get your machine into the workshop, and if you can move the needle position on your machine by pressing a "sideways" button of some sort, you could try to get the needle in the centre yourself using this feature. This will not help if it is the timing that is the major problem.
Pam M.

Posted on May 03, 2009

  • 136 Answers

SOURCE: will not pick up bobbin thread

Unusual for this machine. Check to be sure the needle is inserted with the flat side to the back of the machine. If it is, remove the needle plate, bobbin and bobbin case. Turn the hand wheel slowly toward you and see if the point of the hook is above or below the eye of the needle when the hook point is aligned behind the needle. If the eye is above the point of the hook the machine is out of time and best taken to qualified technician.

Posted on Jul 04, 2009

  • 26 Answers

SOURCE: needle wont pick up bobbin thread

timing issue, need to have serviced.

Posted on Aug 22, 2009

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1 Answer

Thread keeps knotting up under the fabric (bobbin area)


Could be what is called thread nesting or bird nesting.

The first thing to try is installing a brand new needle in your machine. Then try the following suggestions:

sewing machine birdnesting

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Nov 29, 2015 | Brother XL-5130 Mechanical Sewing Machine

1 Answer

My janome magnolia was working just fine and then all of the sudden the bobbin thread keeps knotting up. i've gone over all troubleshooting, cleaned out the lint, replaced the bobbin - all to no avail......


This happened to me on several occasions and finally one service tech told me not to use the needle down auto button. Instead when threading the bobbin just move the wheel toward you slowly until the thread catches.

Jul 08, 2014 | Janome Magnolia 7330 Sewing Machine

1 Answer

I have a singer 201 knee control and I love it until today.


try these suggestions
rethread the machine top and bobbin, using every thread guide
try a new needle--one for the fabric being sewed--make sure the needle is inserted correctly into the needle holder
make sure the thread does not come off the thread take up lever
try a different bobbin
make sure the bobbin is turned the right way in the bobbin case
clean under the needle plate and in the bobbin area for lint

Oct 29, 2013 | Singer Sewing Machines

1 Answer

I am having a problem with my Janome Decor Excel 5018. It was working fine, until the bobbin thread won't gather with the top thread. And the top thread is binding up underneath the fabric. Kim


try a new needle

rethread the machine top & bobbin, that way you make sure the thread is not caught anywhere

make sure the bobbin is correctly inserted in the machine

clean under the needle plate & in the bobbin area for loose thread & lint

always keep a long thread tail of 3 to 5 inches long, & keep the tails pulled back behind the needle
before sewing

if none of these things help the problem,, then it may need to be serviced

Aug 10, 2011 | Janome D'cor Excel 5018

1 Answer

Janome jd 1822 when i'm doing zig zag, the thread is missing stitches and also my threads keep breaking


rethread the machine getting every thread guide
check the thread tension 3 or 4 is usually good
Change needle--make sure the flat side is toward the back of the machine & that it's insert as high as it will go--make sure the needle bar is raised to it's highest position
Clean under needle plate where feed dogs are for lint
Clean bobbin area for lint or loose threads
Rethread machine top thread make sure to get every thread guide
& bobbin that the bobbin is wound correctly & put into the bobbin case or shuttle correctly

here a tip about needle & thread compatability
Cut 6-8 inch piece of thread of the spool you are going to use for your project
Take the needle you are going to use for the project
& insert the thread thru the eye of the needle
& lift one end of the thread to a 45 degree angle
& if the needle is the right size for the thread it will slide down the thread
But if the needle hangs on the thread you need one size larger needle for the thread


Nov 24, 2010 | Janome Sewing Machines

1 Answer

Everything was fine and then there was a noise and the thread got all bunched up underneath. I oiled it and it happened again.


change the needle
clean under the needle plate where the feed dogs are for lint
clean in the bobbin area for lint & loose threads
rethread the machine
check to make sure the bobbin is wound correctly & is inserted correctly
make sure to put the thread thru every thread guide

Nov 18, 2010 | Janome Memory Craft 3000

1 Answer

I have a Janome that looks similar to the Sewist 625e and is 25 years old. The underneath threat of the stitch is knotting up underneath. I have checked that I have threaded top thread correctly. I...


Hi. It may be that you need to adjust the tension. Put a different color thread on top than is in the bobbin and sew a couple of inches, then check. I suspect you'll find that the top thread is the one that is loose and knotting up. (It's hard to tell unless you're using two different color threads.) If that's the case, your upper tension needs to be tighter. Tighten it just a bit, then sew a few more inches and check again. Repeat until you don't see any of the top thread on the bottom (or maybe just a little bit) or the bobbin thread on the top (or maybe just a little bit.).

Hope this helps!

Robbie

Aug 11, 2010 | Janome Sewist 625e

2 Answers

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

Jul 28, 2010 | Janome 4623 Mechanical Sewing Machine

1 Answer

Thread is knotting up under the feed dog plate getting error LO.I tried removing the plateand cleaning and replaced bobbinholder and it is still jamming. is there supposed to be any play in the bobin...


It should move a little so the thread has clearence. If the thread is bunching underneath, it usually means the thread's not in the take-up lever or top tension is too loose. If you're needle has hit the bobbin case and created needle marks, the thread can get caught... in which you'd need to replaced the bobbin case.

Feb 23, 2010 | Janome 8080 Computerized Sewing Machine

1 Answer

Upper thread knots up with bobbin thread when sewing a stich


Thread test
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.

Mar 16, 2009 | Sewing Machines

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