Why does bobbin thread knot up?

The sharp point of the needle catches the bobbin thread, which makes a loop. This interaction creates knots, which are the building blocks of sewing machine stitches. If the needle is dull, this process may not work properly, causing a knot to get caught in the bobbin thread area instead of in the fabric.

Why does my bobbin keep knotting up?

Bobbin Thread Tangling



Tangling is usually as a result of improperly threading the sewing machine. … The tension in both your upper and bobbin threads need to be even. The bobbin could also be placed incorrectly. More than likely, you forgot to put the bobbin back correctly while cleaning your machine.

How do I fix bobbin thread bunching up?

How to Fix Bobbin Thread Bunching and Other Threading Problems

  1. Thread the Machine Properly. Re-thread the upper part of the sewing machine making sure the thread is passing through every single thread guide on its way to the needle. …
  2. Change the Needle. …
  3. Inspect the Bobbin. …
  4. Clean the Machine.

Why is the thread bunching up?

What should I do if I experience thread bunching? As “thread bunching” occurs on the underside of the fabric, some people think it is due to the lower thread. They check whether the bobbin is sitting correctly in the bobbin case or even replace the bobbin. … On many models, the upper thread tension is set automatically.

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Why does my sewing machine keep jamming underneath?

However certain you are that the problem with the machine is most likely due to a huge tangled mess of thread in the bobbin underneath the fabric, the most common reason for the jamming is usually the lack of sufficient tension in the upper thread.

What tension should my sewing machine be on?

The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing. This should be suitable for most fabrics. If you are doing a zig-zag stitch, or another stitch that has width, then you may find that the bobbin thread is pulled through to the top.

Why is the underside of my stitching loose?

Loose seam This indicates that the tension is too loose on both the bobbin and needle thread, the machine has not been threaded correctly, or the thread has not been placed properly between the tension mechanism. The easiest way to spot unbalanced tension is to look for visible knots or loops at the end of each stitch.

Why does my sewing machine keep eating my fabric?

1. It tries to eat your fabric. This most often happens when you are sewing knits and or if you start sewing too close to the edge of the fabric. … If you’re still having issues, try placing tissue paper under your fabric – it tears off easily and will help prevent your fabric from getting sucked into the machine.

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