31.

Why does the lower thread keep breaking?

32.

Fabric and Thread

33.

The bobbin thread cannot be pulled up.

34.

The machine does not make stitches

35.

Can I lower the feed dogs so that my machine doesn't feed fabric automatically?

36.

Upper thread tightened up

37.

How do I sew hook-and-loop fasteners(hook-and-loop tapes)?

38.

Thread tension [Video instructions]