Need advice on my Singer 111w155
I purchases the above Singer walking foot mach. Worked perfect tell i ran out of bobbin thread. After Rewinding bobbin it won't sew. I hand wind mach to start,, then use the foot pedel. i just get thread on top for an inch or so tell it catchs the bobbin thread again [at this point i can c the white bobbin thread coming through on top. I use black on top &white thread for the bobbin]
It just catches maybe once every inch or so.
I've played with the top thread tension adjustment but that doesn't seem to make any difference.
I don't know how to adjust the tension on the bobbin. There are two very small screws on the bobbin case. Both are as tight as they can be.
Any help would be appreciated.
Thank you in advance. Jim