Question about Juki Sewing Machines

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Juki DDL 8500: Bobbin thread is not coming up to the top side and the top thread is looping on the underside. Bobbin thread slides right out, and I've had no luck adjusting the top thread tension.

Posted by Anonymous on

  • Anonymous May 02, 2015

    I use same bobbin case as always, never been a problem in 15 yrs. Thread is good, & threading hasn't been changed. There aren't any numbers on tension dial, how do I know if it is at 4.5?

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  • 63 Answers

What thread are you using and what are you sewing? I'm assuming the machine is stitching correctly and it is just a tension issue. I would test each thread seperatly by hand and see if one thread is too tight or too loose. Thread on the bottom usually mean the top thread is too loose however it could by the bobbin is too tight. It could also indicate a slight timing issue or a burr on the hook. Is the thread shredding or getting damaged?

Posted on May 03, 2015

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Posted on Jan 02, 2017

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SOURCE: Singer CG 550 Top thread keeps wraping around the bobbin and jam

Have you checked the top thread is correctly placed in the spring of the bobbin case?

Posted on Feb 21, 2009

  • 97 Answers

SOURCE: thread or bobbin tension

Thread tension. Beware of adjusting the bobbin screw. Pfaffs maintain their tensions just fine without adjusting the bobbin tension, unless you're using some crazy thick or fine thread. If you must change your bobbin tension, you would be well-advised to buy an extra bobbin case, because re-calibrating your tensions after changing them can be less than fun.

Increase your top tension, and your looping should cease. I normally keep my tension around 4.5. Also make sure you're using a good quality thread, and that there's nothing in the upper tension assemblies. Sometimes a tiny piece of debris can keep the top tension from applying enough tension, so turning the machine off and blowing some canned air in there can help as well.

Good luck,

-R

Posted on Mar 11, 2009

Mimito7
  • 128 Answers

SOURCE: Top thread stitches correctly but bottom thread loops.

FYI---- Loops on the bottom-- problem is in the threading..
Loops on the top--- problem is with the bobbin.

Posted on Apr 19, 2009

ftw1952
  • 10319 Answers

SOURCE: i need find manual for my juki ddl 8500

Go to the website freemanuals.com They may have yours

Posted on Mar 31, 2010

  • 2 Answers

SOURCE: I just bought a used juki DDL 8500 industrial

I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.

If you're looking for where the bobbin case is located on the machine, if you look underneath the machine on the left hand side, there should be a metal belly, on the left side of the belly is an opening, and in there sits the bobbin casing.
I think you were asking for either one of these answers, I'm on here troubleshooting for my Juki DDL-8500, good luck with yours, hopefully I can find what I need to know too!

Posted on Aug 06, 2010

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My bobbin stitch is too tight on my Juki DDL 8500-7, how can I fix this?


Hi LJ,
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Hope this helps
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Hello, I have a juki DDL 5550, runs great, But the tension is off. Top thread bunches up on bottom side of fabric ( bobbin thread looks ok)\r\nThanks,S


Soulds like your not geting the top thread all the way in the tension disk. Make sure you have the presser foot up when you thread the machine. also after you get it treaded check to make sure you have tension, with the presser foot up you should have not tension and with it down it should be very hard to pull.
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Mar 30, 2010 | Juki DDL-8300

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I just bought a used juki DDL 8500 industrial sewing machine. It didn't come with manual. I also can't find a bobbin casing. I feel very foolish. There appears to have a bobbin winder on the side....


I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.
If you're looking for where the bobbin case is located on the machine, if you look underneath the machine on the left hand side, there should be a metal belly, on the left side of the belly is an opening, and in there sits the bobbin casing.
I think you were asking for either one of these answers, I'm on here troubleshooting for my Juki DDL-8500, good luck with yours, hopefully I can find what I need to know too!

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