Adjusting the bottom tension is generally set at the factory and shouldn't need adjustment. The tension on the bobbin case is controlled by a small screw and a curved metal band. Turn the screw that is located next to the thread opening. Remember: Righty, tighty; lefty, loosey!
Coser un círculo fácilmente esto realmente funciona, han utilizado la idea durante años! Círculos perfectos cada vez. ---------- Sew a circle easily THIS really does work, have used the idea for years! Perfect circles each time.