My Grandma wanted a dedicated bobbin winder. She liked the way one of her sewing machines wound them so I copied the setup it had. I made it with scraps I had lying around. Works pretty good.
Step 2: Find a motor
I had an old nail sander that I took the motor out of.
I took the switch out as well.
Step 3: Cut Dowel For Bobbin
Cut a short piece of dowel and sand the end round.
Drill a hole in the flat end slightly smaller in diameter as the motor shaft.
Press the dowel on the motor shaft.
Step 4: Make a Thread Tension
I found some washer and domed them with a ball peen hammer.
Put the to washers on first domed sides together then the two nuts tightening the two nuts together.
Ended up not using the square one.
Step 6: Motor Housing and Thread Post
Drilled a hole in a piece of wood the size of the motor part way through. Then drilled a smaller hole for the arbor.
Drill a hole in the bottom for the thread post and glue in.
Step 7: Glue Up
Center the motor in the housing and glue i with epoxy.
Then glue the motor housing to the back board.
I cut a small piece of wood and glued it to the back to bring out the thread tensioner.
Drilled a hole smaller then the threads of the bolt for the tension and screwed it in.
Step 8: Electrical
I took the C battery box off and soldered a AA one I had in the junk drawer.
Screw the switch and battery pack to the back.
Thought AA would be more convenient.