Idk if this is useful, but tiny rubber bands works for bobbin thread control during storage. : r/sewing

Fixing Thread Gathering On Bottom- Signer Oscillator Adjusting Bottom / Bobbin Tension

Quick Tip: Tension Troubles (Bobbin Shows on Top)

My bobbin thread sensor doesn't work

Sewing Machine Problems: Thread Bunching On Underside Of Fabric & Unjamming

Bobbin problem, I just bought an embroidery machine, i was doing some tests and i tried to change the old bobbin that was already in the machine with the new one i

Material: The bottom line bracket is made of high-quality plastic Suitable for most thread spools and bobbins, Holding tin sold separately Material

Bouclel Keep Your Bobbin Threads Matched Up with Your Thread SpoolsBobbin Buddies Set of 30-Pack Sewing Machine Quilting Supplies Sewing Products

How to Fix Sewing Machine Thread Bunching Up - Itchin' for some Stitchin

Bobbin Rubber Band, Storage Tool Soft and Elastic Bobbin Protection Rubber for Storage(Big red)

Bobbin problem, I just bought an embroidery machine, i was doing some tests and i tried to change the old bobbin that was already in the machine with the new one i bought, but as soon as i changed it i can't get the ratio 1/3 between bobbin and thread