# Clearing a thread jam: Because the rotation of the bobbin in the bobbin case is pretty sloppy, thread jams can happen fairly frequently. Use the screwdriver keys that came with the sewing machines to open the needle plate (a.k.a. the throat plate) and access the bobbin case. | # Clearing a thread jam: Because the rotation of the bobbin in the bobbin case is pretty sloppy, thread jams can happen fairly frequently. Use the screwdriver keys that came with the sewing machines to open the needle plate (a.k.a. the throat plate) and access the bobbin case. |