My thread keeps bunching up on the bottom side. HOw do I solve this.

Those are called bird nests or thread nests. When threading your machine, be sure to ALWAYS raise the presser foot so the thread will seat completely in the tension disk.

What causes Bird Nests Superior Threads

Birds nest under the fabric big loops of thread top side looks good...

Sewing Machine Thread Bunching Up Here Why

Most likely your top thread is not threaded correctly. Unthread and rethread. Check with your manual to make sure you have threaded correctly. Thread bunching up on bottom indicates top thread is threaded wrongly.

try a different needle
here's a link to a free manual from singer
http://www.singerco.com/uploads/download/1199_8770-efs.pdf
some machine can't handle thick fabric & some can
rethread the machine top & bobbin
clean under the needle plate & in the bobbin area
make sure the thread has not come off the thread take up lever

try changing the needle
check the top thread tension to make sure it's not to loose
rethread the machine top & bobbin, make sure the bobbin is wound
correctly & inserted correctly into the machine
make sure the thread has not come off the thread take up lever

then it's very possible that the machine is out of time & needs to be serviced
make sure the needle is in serted correctly--flat side to the back of the machine & all the way up into the needle holder

Usually it is your top threading. Totally rethread then try this trick, with the presser foot up, pull on your top thread, it should feed smoothly, now, lower the presser foot and pull again, your thread should barely move. Sometimes this seats the thread and your problem is solved. Hope it works. Good luck

Sounds like it could be! Probably worth trying to readjust it. Are you using a fine fabric too? That can cause bunching.

when you have bunching on the bottom, you have a problem with the top thread: no tension. (and visa versa) Make sure the thread runs through the tension discs, these discs are activated when you put the presser foot down, so you want to thread the machine with the foot up, also feel if there no burrs, hooks, or whatever, so your top thread comes smooth off the spool, no jerking.

Hi!
There could be several reasons due to which the thread keeps bunching up underneath. 

It may be due to tangling of upper thread. Remove the thread completely from the machine, use correct size spool cap for the size of the thread spool, re-thread the machine, now remove the bobbin and make sure the bobbin is threaded properly in the shuttle race. Remove any loose threads or lint in the shuttle race.


You could be holding the needle thread too tight. Hold the thread lightly to keep the end from going down into the shuttle.
The needle could be thread incorrectly. Thread the needle eye from the front to the back.
The needle could be bent or improperly inserted. Install a new needle with the flat side of the needle facing the back.

Please rate the solution as FixYa and revert for any clarification.

Thanks
Rylee

I have a Singer 2950. The thread keeps getting bunched up on the reserve side of the fabric, and does not stitch. It is driving me crazy. I think I have the bobbin threaded correctly, as well as the machine. I have tried everything! Please help!