Singe 128k Hand crank Heart-cam on bobbin winder
Much to my dismay, the bobbin winder is not working properly. It was working perfectly a few weeks ago and got it out today it won't work.
I load in the long bobbin, thread up and it seems to work fine until the cam comes to a certain point then the cam stops turning and the thread guide stops moving side to side.
The hand crank still turns freely, the tyre is making contact with the wheel, and the bobbin turns but all the thread begins to load in one place.
The cam is lovely and shiny clean and doesn't look damaged. The spiral on the bobbin winder that fits into the teeth look a bit grubby (despite recent cleaning).
Any advice would be most welcome.