Question about Janome D'cor Excel Pro 5124 Mechanical Sewing Machine

1 Answer

Bobbin has no motion

I ran out of bobbin thread.  I reloaded the bobbin.  I replaced the bobbin in the exact same spot it always goes, threaded the thread according to the diagram as always, and now the bobbin does not move, not even to catch up the thread with the needle-thread.  It just sits there looking stupid.  I've now taken the whole damn apparatus apart, but I cannot figure out what *ever* made the bobbin move when it was working!    The only previous symptom was an occasionally loud "chunka chunka" sound from the bobbin along with botched lower stitches.  Any ideas?

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  • MelAlewine1 Mar 08, 2008

    none yet, i was wondering could there be a screw missing that makes the bobbin jump around

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The bobbin will not move unless the thread is being drawn up by the top thread. If the top thread is not bringing up the bobbin thread, but was doing so just fine before it ran out of thread, then most likely the needle has somehow been bent.It may not look bent, but change it anyway. If it was sewing fine before running out, most unlikely that the timing is out. If you removed the black plastic bobbin holder, it may not be seated correctly. Check it for ANY scratches or needle strikes as well. The slightest mark on it will cause dramas. Good luck!

Posted on Oct 22, 2007

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Posted on Jan 02, 2017

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1 Answer

Why does my thread keep bunching up?


That is called "thread nesting," and several things can cause it. The upper thread enters the bobbin area during sewing, catches the bobbin thread, and as the needle goes up, pulls the stitch tight. Something is catching the upper thread as it goes around. The most common reasons are the bobbin or bobbin case (or both) is improperly inserted; the bobbin is warped (roll it down a flat surface--if it wobbles, it's warped), either the case or the bobbin is not seated evenly, there is a rough spot on the bobbin case that is catching the thread, or your bobbin is loosely/badly wound. You need to rule out the possibilities step by step until you find the cause. First, review your threading procedures from start to finish, using your user's manual. Then, without fabric, turn the hand wheel by hand (ALWAYS towards you) to see if you can see it start to catch. The top thread should rotate smoothly in the bobbin area. You should be able to pin-point the cause that way.

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Hello,
Remove the bobbin and drop a little oil in the bobbin holder at the center which you usually insert the bobbin...

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try this:
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 top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
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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 matter how much thread you pull, your thread is good. If that your machine passes that test, we can go to step 2. If not, try different spool of thread, do the 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).
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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

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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)
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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.

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hollie

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1 Answer

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I've just had this exact problem with my model 2037. The problem, according to 3 shops I've taken mine to, is that the shuttle hook (the metal piece that the bobbin sits in) is broken and needs replaced. Problem is, the piece is next to impossible to find. 

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