the thread is bunching on underside of fabric it looks like birdnest?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Need a service manual for a Singer Treadle Sewing Machine Model 66-1?
Need an equivalent to an old Hunts WA71 capacitor/rectifier?
Presser foot is loose?