Tread Tension in Bobbin

"Tension setting on a sewing machine requires a little more than just adjusting the presser foot tension. Bobbin tension plays an important part too and adjusting bobbin tension is crucial for the success of all sewing projects! Did you know the success of your sewing projects is tightly connected to the right tension? Adjusting tension on sewing machine involves three aspects: setting the correct presser foot tension, adjusting bobbin tension according to your project and adjusting top thread tension."