I am having trouble with my sewing machine. The back of the stitch makes big, messy loops of thread. Thoughts?

I have tried rethreading and adjusting the tension.

I am having trouble with my sewing machine. The back of the stitch makes big, messy loops of thread. Thoughts?
1. Consult manual if you have one. Usually it%26#039;s a tension problem. It%26#039;s happened to me when I try to sew using some exotic (unusual weight or slippery) fabric and then I end up playing with the tension as you are doing and then doing the stuff described below.





2. * Are threads caught in the feed plate section (take out the bobbin and examine). If there are, get a tweezer and pull them out. Also clean/ blow/ brush out any lint you see in feed plate and bobbin region as that can cause theads to catch. THE SERVICEMAN COMPLAINED I HAD FAILED TO CLEAN THE LINT FROM MY MACHINE THE FIRST AND LAST TIME I TOOK IT TO HIM. SO NOW I ALWAYS CHECK THIS FIRST.





3. Insert the bobbin without thread. Don%26#039;t thread machine. Does machine jam when you run it slowly (turn the wheel with your hand)?





4. If it does not jam, take scrap cotton fabric -- an old sheet or pillow case (doubled) -- try running it on slow speed (I always keep my hand near the wheel) without any thread. Does the needle go up and down as it should with the needle entering and exiting the feed plate normally? If it seems OK, try feeding scrap material through again with same regular-weight cotton or cotton/poly thread in both the bobbin and on top. Will machine work in reverse without the threads catching?





5. If you still can%26#039;t seem to get it going, you will need to bring it to your sewing machine service center: it probably needs servicing.
Reply:take the bobbin completely out of the casing and see if something is stuck in the machine,try adjusting your stitches also
Reply:Could be the wrong size needle for the fabric being used. It really sound like a tension problem though - maybe your tension screw is worn and pressure is not true anymore.
Reply:if your bobbin is okay it is your tension adjustment
Reply:If your bobbin is in a separate metal casing pull it out of the machine and put the bobbin back in it pull the thread some to make sure the bobbin is turning clockwise, hold the metal piece with the little bar sticking up , then just holding the thread the whole thing should slowly fall downwards, if it doesn%26#039;t move at all your bobbin tension is to tight, falls right away to loose, adjust the small screw in the metal casing accordingly. also make sure your thread is snapped through the opening of the bobbin and that the metal casing is sucurely in the machine.
Reply:Your problem is with the bobbin, try re-threading the bobbin, or your bobbin may not have threaded itself correctly. The other thing to try is to see if you have the proper sized bobbin for your machine!
Reply:Make sure your bobbin is properly loaded and the thread is not getting stuck in it. That%26#039;s what happens to me. I have a really old (20 years) sewing machine.
Reply:You upper tension needs to be adjusted.


When the bottom is out of wack, the top tension needs to be adjusted, when the top is out of wack, the bobbin tension needs to be adjusted. If you cannot get in adjusted on your own so that it works properly, you may have to take it in for a professional cleaning and adjustment.
Reply:make sure there is no lint in the tension assembly, then adjust it to about the middle and try test stitches, adjusting it a little tighter each time (or looser) until the stitches look the same on the top and bottom.



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