How to mend Sewing Machine Thread Singer

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

singer foot pedal ?

Presser foot is loose?

Hello zigzag industrial singer 457 u105 not stylist is missing stitches?

Why won't my Singer Touch Tronic pick up the bobbin thread? ?

Machine Stuck in Reverse?

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

obtain?

Why does a sewing machine motor overheat?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

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

Engine revving up ?

singer HD110?

where can I get a thread guide post for a Singer Touchtronic?

Singer 507?

pedal machine Singer serie K10736204?

How can I replace the Top Vertical Shaft Bevel Gear for SINGER MODEL 248?

My bobbin case for Singer 2662 will not seat right and I cannot sew?

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

Singer 188K1 presser bar stuck?

Singer 6234 Tension problems?

1965 Singer 275k sewing machine foot pedal?

Bobbin won't wind?

Singer model 750 Golden touch and sew?

how to get the tension right on my machine?

Replacing a gear in Singer Stylist 457?

I'm in Australia and need a Bobbin case for a singer 196K205?

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

machine motor running the wrong way?

How can I fix a reverse problem in my sewing machine?