What happens if bobbin tension is too loose?

A: Looping on the underside, or back of the fabric, means the top tension is too loose compared to the bobbin tension, so the bobbin thread is pulling too much top thread underneath. By tightening the top tension, the loops will stop, but the added tension may cause breakage, especially with sensitive threads.

What number should bobbin tension be?

Proper bobbin tension is essential to good embroidery. If tension is too tight, unwanted bobbin thread may begin to show on top of your garment and you may begin to experience frequent thread breaks which wastes time and money. Bobbin tensions should be 18 to 22 grams (up to 25 grams when embroidering caps).

Do I need to adjust bobbin tension?

Typically, when you use a lighter-than-normal thread for both needle and bobbin, the tensions will stay balanced, even though they’re both lighter. This is often just what you need to avoid puckering lightweight fabrics, so no adjustment may be necessary.

What happens if there is too much tension on the bobbin?

Too much tension, the thread ends are pulled to far apart and the thread might snap. Too little tension, the thread will sag or not lay flat on the fabric because there is too much slack. In this post, we are going to focus on the bobbin tension.

What does the back of a bobbin case do?

Since I’m a longarmer and fix my own machine, I’m pretty familiar with bobbin cases. The silver part at the back is a backlash spring. It’s job is to keep some tension on the bobbin during fast sewing, so that when you change speed, your bobbin doesn’t keep spinning and make messes, or backlash.

What causes a thread to get stuck in the bobbin?

This can be caused if the top thread tension is too tight, or if the bobbin thread is not in the bobbin case tension. Check that the upper thread is feeding freely without obstruction (like getting stuck behind the spool cap or getting caught on any rough spots o the thread spool itself).

What are the problems with sewing machine bobbins?

One of the basic and main problems that arises with the bobbin case is that you may not have inserted the bobbin inside correctly. Not all sewing machines have their bobbins inserted in the same way. Singer, for example, has both a clockwise and a counter-clockwise placement. Which one you have depends on your machine.