Toyota Quiltmaster keeps breaking upper thread and missing stitches

Usually when it stitches an inch or two and then breaks, the upper thread is mis-threaded.

Remove the upper thread and rethread from the beginning. ALWAYS RAISE the presser foot when threading the upper thread. Check to make sure the thread path is correct. If it is threaded incorrectly, the thread will frequently break.

Also check that the thread is not hanging up somewhere, sometimes it gets looped around something or it snags on the little slit on the thread spool or a rough spot.

If the upper thread tension is too tight, it will also break the thread. Make sure the tension disk is clean. If there is gunk or a piece of thread stuck in the tension disk, it could be interfering.

If the thread is fraying as it goes through the needle eye, then there is probably an incompatibility of the needle, thread, fabric.

All About Needles

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwjWgZq5ho3PAhUh7oMKHVc-DVcQFggkMAE&url=http%3A%2F%2Fwww.schmetzneedles.com%2Flearning%2Fpdf%2Fschmetz-needle-chart.pdf&usg=AFQjCNHTR52AmqwzvyCjbXmD5Ch52Va5_Q&cad=rja

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Usually thread breakage is a result of incorrect threading or the thread tension set too tight.

Install a brand new needle.

Remove the upper thread. RAISE the presser foot and rethread from the beginning (verify the threading sequence is correct).

Check that the tension is set at the midway point between the high and low numbers.

Retest. If still breaking, there are other less common problems (thread/needle incompatibility, burrs or knicks catching the thread, etc) that may be the cause. Check the following web sites:

Sewing Machine Thread Keeps Breaking

Why is my thread breaking

Sewing Machine Problem 1 Thread Breakage

Install a brand new needle. Make sure you are using thread and needle that are compatible with the fabric you are sewing.

Change the type of thread you are using. Old or bargain bin threads will frequently cause problems.

Clean the tension disks to make sure there is nothing stuck that is preventing the thread from feeding.

Remove all the thread and re-thread from the beginning. FIRST raise the presser foot so the tension disks will allow the thread to seat properly. (Consult your owner's manual.) Make sure you are threading everything in the proper sequence and not missing any steps.

Set the upper tension at the halfway point between the high and low number.

Stitch a test on a piece of your scrap fabric from your project.

The ideal tension is when the upper thread and bobbin thread meet in the middle of the fabric. If the bobbin thread is appearing at the top of the fabric, your upper tension is too tight and needs to be loosened. If the upper thread is appearing under the fabric or forming a loopy mess, the upper thread is too loose.

Keep adjusting and testing until the tension appears correct.

If the thread continues to break, then there may be a burr that is catching the thread and breaking it. Or the timing could be off. Take it for service.

http://www.schmetzneedles.com/all-about-needles/

http://www.sewingandcraftcorner.com/why-does-my-thread-keep-breaking-while-i-sew/

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Is your bobbin threaded correctly? You should be able to pull out the thread slowly while feeling it very slightly holding back. It should not pull out easily or quickly.
Could be something wrong with your tensions, try adjusting the upper tension first by starting at the middle setting and working gradually higher and then lower till you get a neat even stitch.

I found a cross-reference for Yakumo DSN-178-2 that may be the same/similar to your machine. You may have to inquire with some dealers who specialize in quilting machines.

You might try these guys:
http://www.shop.heavysew.com/Nakijima_c12.htm

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&cad=rja&uact=8&ved=0CEcQFjAHahUKEwjEnMq0nYvIAhWIl4gKHUpQBhE&url=http%3A%2F%2Fsupsew.com%2FKnowledgeBaseArtefacts%2Fimages%2F2011-CATSMALL.pdf&usg=AFQjCNEl5yerqEZBpd6Issbk5A0BZnGOVw


YAKUMO DSN 178 2 SHOP Manuals

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top tension too tight

It certainly sounds like the tension. Check with the manufacturer, as they will help you and tell you how to replace the manual.

This is a problem with thread tension. The needle thread is too tight and the bobbin thread is too loose. I don't have one of these machines, but there should be either screws or knobs to adjust. Look at your manual. Here's a page I found on bobbin tension.
https://www.manualslib.com/manual/1022927/Toyota-Quilt-50.html?page=50

Hello,
Here are a few things to try.

* Raise your feed dogs if your machine has this feature.

* When you start to sew a seam, hold the upper and bobbin thread tails. Hold them back and out of the way as you sew your first couple of stitches. This will keep them from getting caught in your machine.

* Your fabric may require a different needle. Generally, heavier fabrics require larger needles and thinner fabrics, smaller needles. You may also need a larger needle if you're sewing through many layers of fabric. And make sure to use a ballpoint needle for knit fabrics and a sharp needle for woven (or a universal needle for either). And make sure your needle is appropriate for the type of thread you're using.

* Adjust the pressure of your pressure foot, it may be too light for your fabric.

* If your upper thread and bobbin threads are different types, try using the same thread for both. And use a good quality, brand name thread.

* Change your needle plate. Try switching to a needle plate with a smaller hole (a straight stitch needle plate).

Important Note: If you change your needle plate, check to make sure your needle aligns perfectly with this smaller hole before starting to sew. A misaligned needle could hit the plate and break, which could be dangerous. And make sure to change your needle plate back for zigzag and other wide stitches.

I hope this helps.

I was having this very same problem with my lower looper . I had been using the one needle stitching all afternoon and I was doing quite nice stitching. then I decided to put the right needle back in and do some overlock stitching and guess what I spent the next two hours fighting the looper problem. I had completely re-thread this machine at least 20 times now. I decided to take the needle out and re-insert it and re-thread it one more time (right lower looper- then upper looper- right needle- then left needle) was careful to pull all threads to the back and under the presser foot for about 6 inches.
Held on to the thread, lowered presser foot and did the chaining stitch. BINGO it didn't break, tried it with a piece of cloth and Perfect stitches. I have a Babylock BL402 and used tension settings left to right
4-3-3-3 and default settings for the rest.
Hope this helps someone someday.
Jo Griffith