[derk derin]

As far as operation of the machine it was a trials & errors for me as it was in storage and disassembled for years before I decided to start using it.
YouTube videos on the subject helped me understand many things about setting up the machine like how to load the spool of thread in the bobbin correctly and placing it in the sewing machine. Tension on the bobbin thread and sewing machine tension was critical in getting a nice tight stitch without breaking the thread. Trial & error! As far as the spool bobbin winder, that I had to figure out all on my own. Sitting for so many years left things gummed up and had to be lubricated. Nothing a tin of sewing machine oil didn’t fix.
The bobbin winder must be set up on the table so when the machine is running, the wheel isn’t turning. By placing an empty bobbin on the wonder you then push down on the bracket which puts the wheel up against the belt and allows the bobbin to spin. Run your thread through the tensioner at the other end and thread through the eyehole to guide it and once the thread fills the bobbin, the arm kicks off the wheel!