To test your bobbin tension, remove the bobbin case and bobbin from your machine and hold the end of your bobbin thread. Swiftly pull up on the thread. The thread should unwind just slightly and the bobbin case should drop an inch or two.
How much tension should a bobbin have?
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).
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 causes bobbin thread to bunch up?
Bobbin Thread Tangling
The bobbin keeps pulling and jamming collecting a lot of thread beneath your fabric. There are several culprits for this ranging from a dull needle, improper threading or tension. The tension in both your upper and bobbin threads need to be even. The bobbin could also be placed incorrectly.
How do you fix top thread tension?
perfect tension means the stitches look the same on the front as on the back. If the bobbin thread is showing on the top, loosen your tension (decrease the number on your tension indicator). If the top thread is nesting on the bottom, increase the tension (increase the number of your tension indicator).