doing just fine sewing on my first quilt and then all of sudden my top thread is making raised wierd lines on the back of my quilt.....sticking up and not even laying flat.......haven't touched anything on machine......can someone help me with this please.

Clean your bobbin area well, completely rethread your machine, check that your bobbin is in correctly, and if that doesn't do it, try changing your needle too :D:D:D

Excellent advice from amma - changing the needle does wonders - also besure you somehow did not move the tension part or thread not running smoothly from the spool.

will do thank you

I agree with what has been said!

okay did what you said......needle thread seems to get stuck inside the machine and there was a lot of dust in there.....is there a proper way to clean it out beside blow on it..

I bet your thread "jumped" out of a tension disc or take-up lever somewhere. I would start by rethreading, cleaning the lint out of the bobbin area and giving it another go.

thank you all so much it's back to working.......again thank you

You should have a soft little brush - similar to a small pastry brush to work all that lint out of the bobbin area. My Singer 401A sits in a cabinet made for me and the area is open from the bottom. I can even get my Singer brush up from that way. I'm so glad things worked out. - We all knew what you were feeling!

And make sure the thread is in the take up arm up there at the top of the machine. Sometimes it pops out and causes your problem. The best way is to just rethread it, like someone else said.