Question about Yamata FY700 Mechanical Sewing Machine

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Sewing machine bobbin casing is loose and can't get it back in!

Frustrated with my machine a Singer 9410. The tension is messed up and it is bunching and looping stitches. Within a couple of seconds it won't go any further and I turn the fabric over and half the bobbin is looped in one big chunk. I noticed the bobbin casing itself was loose and I pulled it out. I blew all the dust and excess lint out and then couldn't put the bobbin casing in correctly. Not sure what to do. I think I should be able to put this back without help of a shop? Before I took the thing apart, I even tried a different bobbin size. That didn't work. I could really use any suggestions or know hows, I have several sewing projects on hold. Thanks!

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  • Master
  • 1,952 Answers

In the lower right hand corner of the bobbin case area, there is a small finger-like spring structure. Gently lift it and push it to the right. Take the bobbin case in hand and inspect it. It is a round piece of metal with a groove running down the edge of it. Now look at the hook, or the round piece of metal that is in the bobbin case area. It has a slight shelf-like structure. Place the bobbin case groove into the shelf-like structure in the hook so as to make it sit flush. With your finger, take the front of the bobbin case and push it to its left so that it is as far counterclockwise as possible and replace the spring.

Hope this helps.

Posted on Jul 20, 2009

  • Nancy Sep 04, 2013

    With mine, the nut had fallen off the screw that holds the tightening lever in the back. This lever is supposed to be loosened and tightened to remove the bobbin case for cleaning. Flip the sewing machine over, undo the screw that holds the casing on. Inside there was much lint, two washers, a spring, and a nut. This was preventing me from tightening the top screw and keeping the bobbin in place. I cleaned everything out, put washer, spring, washer, nut back onto the screw, replaced the bottom casing, and the problem was solved.

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Posted on Jan 02, 2017

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1 Answer

Have a Singer 11910000A and the bobber thread bunches up and makes a mess in the feet when sewing


Is it really the bobbin thread that is globbing? Check closely. Usually it is the upper thread accumulating under the fabric.

If it is in fact the bobbin thread, then the bobbin case is not threaded correctly, the bobbin case tension needs adjustment, or it is broken and needs replacement. There are web sites and YouTube videos that show how to adjust the bobbin case tension.

QUICK FIXES: Remove all the thread from the machine. Clean the area around the feed dogs and bobbin area. Oil as instructed in the owner's manual using ONLY fresh, good quality sewing machine oil (only 1-2 drops each spot). Install a brand new needle insuring it is installed correctly. Avoid using fuzzy, old, or bargain bin thread. Rethread: Be sure you raise the presser foot BEFORE threading the upper thread so it will seat properly in the tension disk--and check to make sure you are threading the machine correctly. Check that the upper tension is set properly (the factory standard is usually the halfway point between the high & low number on the selection). Test on a scrap of the fabric you wish to sew. Adjust the upper tension--either tighten to pull the upper thread toward the top of the fabric, or loosen to pull more upper thread down.

Here are some web sites that may help.

Sewing Machine Thread Bunching Up Here Why

sewing machine birdnesting

https://answers.yahoo.com/question/index?qid=20100303212248AAnRUQA

8 Tips to Fix Birdnesting in Embroidery

Birds nest under the fabric big loops of thread top side looks good...

http://www.marthastewart.com/1085057/common-sewing-machine-repair-tips


and here's another Hint that may be helpful:

https://www.youtube.com/watch?v=KDERq4I7l-Q

...

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1 Answer

When i am sewing the stiches on top, but its at the bottom


change the needle --make sure it's the right one for the fabric
being sewed

rethread the machine top and bobbin

make sure the bobbin is turned the right way in the bobbin case

also check the top thread tension, if the stitches under the fabric
are loose adjust the top thread tension one number or letter higher
at a time and sew on a scrap piece of fabric till the stitches look
normal

here is a free manual
http://www.singerco.com/uploads/download/696_5417c.pdf

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I would start by looking for a problem with the bobbin tension. Do you have the bobbin threaded through the case correctly? Is the the bobbin tension set to loose? Another thing that can cause it to spool up on the bottom is if it sews a bunch of stitches all in the same spot or real close, do you have the presser foot tension to loose?

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The bobbin thread is sewing loose stitches and jamming the machine. I have re-threaded everything, brushed out the bobbin casing, changed needles, adjusted thread and bobbin tension, and am stuck and...


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Make sure the flat side of the needle shaft is facing to the back of the machine.

Don't do anything to the bobbin tension. Set the top thread tension to what is recommended by the mfg.

Make sure the thread from the bobbin is feeding from the bobbin in the correct direction and through the correct guides.

After inserting the bobbin and threading the machine, lower the needle (hold on to the thread tail) and then raise it by turning the hand wheel by hand to pull up the bobbin thread.

Gently pull the two threads under the presser foot and to the back of the sewing machine before you begin to sew.

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