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Bobbin tension is too loose

How do I adjust the bobbin tension in a Singer 7422?

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"Birdnesting" occurs when there is no tension on the needle thread to pull the bobbin thread. This is easily corrected by rethreading the machine, following the threading path carefully and making sure the thread is fully engaged in the tension mechanism.

Posted on Apr 16, 2010


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The thread tension on my singer advance 7422 is to loose, and i move the thread tension dial to make it tighter but it doesnt make a difference. what can i do to fix this?

Useful to check the spool and bobbin threading. If either is not threaded correctly, the fabric will pucker/thread will break/loops will appear on either side of the fabric. Easiest to do with machine manual open so as to follow the instructions. Easiest to check your threading each time you change threads by running a test seam on scrap fabric (I keep a large piece of scrap fabric folded in half just for this). More often than not, the problem is with threading. Check threading before you change tension dial or ajust screws. Otherwise, you'll have changed the tension and may still have threading problems. Good luck.

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My Singer 7422 seems to be jammed. When I start to make a stitch, the thread from the needle gets caught on something on the bottom and the thread goes over the bobbin.

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My thread (not bobbin thread) is bunching excessively on my singer 7422 and can't figure out why.

Hi Tammy,

The problem seems to be with the thred tension adjustment lever/screw (it looks something like 2 inverted disc washers clamping each other thru which a section of your thred passes before going to the puller and then subsequently to the needle guide and then the needle. The fundamental principle of all sewing machins ae the same. Check for the tension. It may have become loose. Also check for the rocker on the inside where you place your bobbin. Are the rocker arriving in syncronisation when the needle is at its maximum in side the knotting hole. If not then there must have been a slight play in the assembly. You alone may not be able to solve all these things. But atleast you know what are the possibilities. I suggest you try only what you can do on the outside. As for the rest, you should refer it to an authorised service person.

Good luck tammy.

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Make sure you have the machine threaded for the bobbin and not threaded through the sewing path. Also, check to make sure that the bobbin is pushed directly against the post as far as possible.

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