How do I correct the problem of loose thread in my bobbbin. It also loops a bit. The manual said something about tension and to fix the little screw. Well they forgot to say which screw and where it is located. There are lots of screws on my machine and I have no idea which one they are talking about. Can you help? Thanks.
My sewing machine is a Singer and does not have a removable bobbin case of the past....my thread loops a lot!...had the same problem with my last Singer sewing machine....they don't make them like they used to...quality is not in the picture anymore, it seems.
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Check your upper threading. Make sure it's between your tension discs. Remember loops on bottom, something is wrong with upper threading/tension. Loops on top something is wrong in the bobbin area (like the bobbin being in upside down or a loose bobbin tension spring)
start by rethreading the top thread with the presser foot UP.
If it is your top thread looping then the top thread is too loose and you need to tighten the top tension. Usually the higher the number the tighter the thread. If it is the lower thread looping to the top then try loosening the top thread first by lowering your tension number. If this doesnt work then depending on whether or not you have a separate bobbin case, which has a small flat screw 3-4mm diameter which can be turned by the flat of your thumbclockwise to tighten, if looping and anticlockwise to losen. Normally only the top tenison needs to be fiddled with. If you have to change the lower(bobbin) then one way of checking a good tension is to let the bobbin drop whilst holding the thread and it should drop comfortably with a small pull on the thread a little bit like operting a yoyo:)
If by "bobbin thread is usually too loose." you mean that you are seeing loopy stuff on top of your seam... then first you need to make sure your bobbin is un-spooling in the correct direction.
Also make sure that the tension spring on your bobbin case is not missing it's screw. Don't mess with the tension there yet... loosen your top tension first... sew on scrap fabric of the same type as your project. Loosen the top tension until you stop seeing loops on top of your seam. If you have loosened it enough to see loops on the bottom... tighten it a bit.
If all else fails make sure you re-thread the top thread with the pressure foot up position so you make sure you are getting the top thread in the tension discs and try test sewing again.
have you checked the tension? In the older machines you could adjust the thread tension by tightening the screw on the side of the bobin case. With alot of the newer machines you have to lift out the bobbin and then lift out the casing to adjust the screw on the underside of the casing.
Manually cycle the machine watching the action with the bobbin covers off. The needle should come up a bit and put a loop out for the little point on the shuttle to come around and catch. Also check needle is in correctly and fully seated.. Groove should be toward you.
If the cloth is very light, the friction of the thread in the cloth may NOT be enough to allow the loop to form. You may have to hold the needle thread a bit to add to the friction so the loop/buldge can form.
If the thread is looping underneath, you're top tension may be too loose or the thread may not be in the take-up lever. If it's looping on top, double check that the thread is in the bobbin tension or that the bobbin tension isn't too loose.