What causes that tangle of thread when I’m machine quilting?

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A tug…a pop!…and now you’ve got a tangled mess on the back of your quilt. Here’s how to keep that from happening.

Sometimes when I am machine quilting I feel a tug from underneath. Then I feel a thread break and I can continue quilting.

When I look on the back of the quilt I have a glob of thread where it got hung up and broke loose. What causes this?

Bird’s nests (or “thread throw-up,” as we like to call it) happens when your upper tension is too loose. Your thread is getting wrapped around your bobbin casing, causing the snarl.

The solution is simple: just tighten your upper tension a bit. Never tighten more than half a number at a time. And remember: “Lower is Looser,” so you want to go up half a number, not down.

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