How to mend Hello Zigzag Singer

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

Singer 507?

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

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

Machine Stuck in Reverse?

Singer 6234 Tension problems?

pedal machine Singer serie K10736204?

how to get the tension right on my machine?

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

Singer zigzag 457 Stylist not threading bobbin/making stitch?

singer HD110?

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

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

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

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

Engine revving up ?

Replacing a gear in Singer Stylist 457?

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

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

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

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

1965 Singer 275k sewing machine foot pedal?

Bobbin won't wind?

singer foot pedal ?

obtain?

Singer model 750 Golden touch and sew?

Presser foot is loose?

Singer 188K1 presser bar stuck?

machine motor running the wrong way?

Why does a sewing machine motor overheat?