HettyB

I came across this article which I thought was very interesting and might be of interest to those with the long bobbin winder

It is entitled Math and the Sewing Machine - mathematical aspects of the action of the sewing machine and of the often associated bobbin winder

http://www.ams.org/publicoutreach/fe...umn/fc-2015-05

Regards

liking quilting

Great resource to links in this article!

QuiltMom2

Thanks for posting. Very interesting since I have clear memories of my grandmother's machine with the long bobbin.

KLO

Thanks for this. I have a long bobbin machine so will be reading through the article in the near future.