I teach others to sew I used to leave out the explanation of how a stitch
is created. I didn't want to over-whelm new students with all they have to
learn the first few lessons. However, recently, I have decided to add this
information and I have found it amazing the curiosity and interest that
students have about how a stitch is actually made.
This is the
sequence of events on how a stitch is made:
The feed dogs
(little teeth like things on the plate where the fabric lies) job is to
push the fabric forward. While the needle with the thread enters the
fabric, the feed dogs lower. The needle comes back up again through the
fabric leaving a loop. The hook on the bobbin case catches the loop making
it go around the bobbin thread. When the needle is at its highest point,
the feed dog push the fabric, and the fabric is drawn forward, it pulls
the loop tight, and creates a locked stitch.
This sequence is
repeated for each stitch.