One is to loosen the screw that controls bobbin tension (some machines have a aquot; fingeraquot; which exerts minimal pressure on the bobbin thread and allows the use of thick threads and yarns). Another way is to bypass bobbin tension altogether.
|Title||:||The sewing machine craft book|
|Author||:||Carolyn Vosburg Hall|
|Publisher||:||Van Nostrand Reinhold Company - 1980-01-01|