I'm pretty clueless with my machine. It is second-hand and I don't have the manual; here are the instructions for threading. I just pulled the machine out for the first time since we moved. I managed to wind the bobbin and thread the machine, but when I try and actually sew, it only makes maybe 1/2" of stitches, and then the needle comes unthreaded. I tried fiddling around with stitch size & tension, but I really don't know how that would affect anything. Any ideas? I finally got to work on my unfinished project, have it all pinned, and now I'm stuck! 
