Bernina Aurora 440 knotting below my fabric and into bobbin area.
Every time I start sewing, the thread gets tangled up on the bottom of my project and tugged down into the bobbin area, breaking the thread most of the time. The bobbin makes some clicking sounds when this is happening. I've changed to a new needle, cleaned and oiled the bobbin case, and dusted the area. I've checked the presser foot tension - 47. The top tension is set at 4. It was working fine, then I switched to the Stitch Regulator Free Motion foot and every time I pressed the foot peddle, it was going a million miles an hour and knotting up - I had the speed at the lowest it could go and tried both BSR 1 and 2 setting. Then switched back to foot 20 and regular straigth stitch and brought the foot tension from 1 to 47 again (and yes, I had the feed dogs down for the BSR and up for the straight stitch). Now it won't work for the straight stitch b/c of this knotting problem. Any suggestions?
Re: Bernina Aurora 440 knotting below my fabric and into...
Are you sure you have the bobbin the right way round in the holder....when you look at the bobbin and tug the thread, the bobbin should move clockwise.
Pull out the foot pedal and use bsr2 with the start/stop button.
Bring bobbin thread to top of work before starting to sew. This may help knotting problem
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The problem most likely is not the bobbin. The problem is the top thread. If thread is knotting, tangling under the fabric, it is a top thread problem.
Remove the top thread from the machine. ALWAYS RAISE the presser foot and rethread from the beginning.
If there are still thread clumps under the fabric, you will need to increase the top tension. (The extra thread appearing under the fabric is excess top thread hanging up under the fabric.) You may need to keep adjusting the top tension until both top & bobbin threads meet in the middle of the fabric.
try changing the needle --make sure the needle is the right one for the fabric being sewed try a different thread make sure the bobbin is not over filled make sure the bobbin is turned the right way in the bobbin case make sure the thread has not come off the thread take up lever
try changing the needle---flat side goes to the back side of the machine also check the top tension depending on the fabric your sewing on--the needle & thread have to work with the fabric--example light fabric needs a different needle & thread than a heavy fabric check to see if the thread is coming off the thread take up lever when you sew.
Something is not threaded right on the top, or the thread is tangled. Take the thread completely out and rethread. Also, make sure that no thread is caught in the bobbin area, if necessary take bobbin casing out and clean with a brush. Always turn the handwheel towards you, never away from you because it can mess up the timing, Also google Singer 401a there is a great blog on this machine
I had this same problem yesterday. I took apart the needle tension casing and now it doesn't get tangled or stop. The only thing is the bobbin is not sewing...it looks fine on the top, but the bottom is just loose loops.
when the needle pulls the fabric into the feed dog you dont have enough fabric behund the neelde when you srart, and the fabric gets caught in the feed and the bobbin case underneath clean it out anf change the needle they often get bent after they get tangled in the thread and fabric