My machine was doing lovely for a whole week then yesterday while I was sewing along the tread bunched up on the underside around the bobbin. Now the bobbin thread will not catch at all. I have tried everything, I took it apart - cleaned it - made sure everything was in the correct position - tried every kind of bobbin and or needle I had - and still no success. It is only a week old and I cannot finish my dress:( Please if you have any insight, share.
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Jan 21, 2014 - There are lots of reasons for sewing machine thread bunching up, and ... or bird nesting, on the top of your fabric, the culprit has something to do ... Frequent dusting underneath the throat plate and along the thread .... It looks like it's hardly been used but the top thread keeps tangling below the material.
I had/have the same problem...the gal at Joann's told me that it is USUALLY related to the needle being wrong for the fabric, an old needle, pulling as you sew, etc. Tweak everything possible, use a scrap fabric, keep resewing til machine behaves and then go to your real fabric. I always sew now with a scrap I test before doing something on the real piece. Also I was having bunching with my UNDERSIDE and assumed it was the bobbin thread. She told me the underside problems are from the top thread, not the bobbin thread..so she showed me how I was slightly threading wrong. I have a Singer Curvy and love it, but it is finicky when default settings are changed with stitch, width, length not matching the recommended settings. Good luck!
Take the thread off the top of your machine and rethread it. Anytime a sewing machine bunches up the thread on the bottom the cause is the top thread. Make sure the tension dial is on "5". After you thread the machine, put the pressure foot down,(like its resting on fabric, but not on the thread), and pull the thread towards the back of the machine. It should be somewhat tight. The needle should "bow" slightly before the thread comes through the needle.
Check between the tension disc, sometimes you can get a piece of thread caught in that and it prevents it from tightening down and making a good stitch. Also, make sure that your presser foot is in the up position when you thread your machine.
Try putting a new sewing machine needle in and make sure the eye of the needle is facing the right way. Needles look like they should go just anyway, but if they aren't in right, it could cause the problem you are having.
Remove your needle plate, and take out the black bobincase. Check the edges on the black bobbincase for scratches or damages. The upper tread should glide smootly around the upper edge of this bobbincase.
If you find any scratches, you may use a very fine sandpaper/grindingpaper (not shure what you call this in english) to remove the scratches.