Question about Brother LS-1520 Mechanical Sewing Machine
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Posted on Jan 02, 2017
Our machine had the same problem, there was a piece of broken thread stuck in the upper tension spring keeping the tension spring open. removing the broken thread in the upper tension solved the problem for us
Posted on Mar 21, 2007
SOURCE: Brother XL-5130 Sewing Machine
Put the thread through one of the holes. Then put the bobbin on the spindle. Pull about 3 or 4 inches out of the hole and hold on to it. Start winding the bobbin. After about ten turns, or when the winding thread is secure, you can stop the machine and cut off this 3 or 4 inch tail. To insure that the thread winds up and down the bobbin and not off the top or bottom, there is probably a metal bobbin tension disk that the thread must pass around before it goes to the bobbin. It is probably on the left of the machine and may or may not be part of a thread guide. The thread must pass around this disk on its way to the bobbin in order to put tension on the thread so it will wind properly. If you can't find the disk, which is a small metal button or screw with some type of somewhat moveable spring cap, you can just get the thread to pass through your thumb and forefinger. Hold your hand 6 or 8 inches to the left of the bobbin and pass the thread between your thumb and forefinger so that it makes the thread go in a direct straight line to the bobbin. Pinch the thread only enough to keep it taught but not tight and let it flow through your finger to the bobbin. The thread should go up and down evenly on the bobbin. If not, move your hand up or down to position it so the thread will wind up and down smoothly. It will not be necessary to move your hand once you find the correct position needed for winding.
Posted on Jul 20, 2007
The top of the machine is not threaded correctly. First raise the presserfot then rethread the machine. Bottom looping is usually caused by a lack of top tension. There could allso be a bur on the hook.
Posted on Feb 23, 2008
IT PROBABLY IS THREADED INCORRECTLY. GO SLOWLY BY THE DIAPHRAGM AND MAKE SURE IT IS THREADED CORRECTLY. ALSO MAKE SURE SPOOL PIN HOLDERS ARE IN PLACE THAT HELPS TO GUIDE THE THREAD CORRECTLY.
Posted on Sep 22, 2008
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.
Thread knotting on the bobbin can be a lot of things but here's some guidance:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on toip and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
Jamming bobbin case:
If it is damaged from turning out of place once, it could have rough spots on it that makes the thread hang on it, and keeps making it turn over and over. Use a finger nail board (fine sanding) and smoothall rough spots. Then reset the bobbin case taking care to put the notch in the bobbin case in alignment with the proper spot in the machine (basically 5 o’clock) when looking at the round area where the bobbin case goes.
Posted on Mar 18, 2009
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