cannot seem to get the black bobbin case back into?

Bobbin won't wind?

the thread is bunching on underside of fabric it looks like birdnest?

how to get the tension right on my machine?

Singer 201 went bang , smelt and now won’t work?

What size needles can I use for my Singer 39a3?

Presser foot is loose?

Engine revving up ?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

My CG 500/550 Singer Sewing Machine's bobbin isn't working?

Singer 507?

Need a service manual for a Singer Treadle Sewing Machine Model 66-1?

1965 Singer 275k sewing machine foot pedal?