How does a vertical bobbin work?
When the needle comes down into the fabric and begins to rise, a little loop of thread is formed behind the needle. The hook picks up this loop, and wraps it around the bobbin thread by traveling around the bobbin case. … A rotating hook continues around the bobbin in one direction.
Are all sewing bobbins the same?
Types of Bobbins
Bobbins not only come in different sizes, but also in metal as well as plastic, and empty as well as pre-wound. While machines can only use one bobbin size, whether it is plastic or metal does not typically matter, however consult your machine manual to be sure.
Is the bobbin supposed to spin?
Insert the bobbin making sure the bobbin rotates counterclockwise when you pull the thread. NOTE: This is a very important step as the bobbin can become unthreaded and cause sewing problems if it rotates clockwise.
What Does It Do? In general, the bobbin is the thing that feeds the thread to stitch from the lower part of the machine. Its purpose is to hold the thread below the needle, and it is where the thread in which you stitch comes from.
Why do sewing machines have two threads?
But with a sewing machine, the needle’s only purpose is to prick the fabric to push one thread through, so it can make a knot with a second thread before being pulled back up. The knot has become the core. … This bobbin supplies the second thread (also called lower thread).
What happens if you use the wrong size bobbin?
The short answer is YES! Filling a sewing machine bobbin too tightly can make a plastic bobbin bulge or stretch the thread if you are using a metal bobbin. This may be hard to see but can cause all kinds of problems. Plastic bobbins can become compressed in the center causing the bobbin to distort.