Question about Brother LS-2125 Mechanical Sewing Machine
Top thread is too loose making big loop
Here are 2 free manual for the machine choose which one is correct
for the model, when the top thread is loose you have to adjust the
bobbin tension which should be covered in the manual,, if the
information is not in the manual then the machine would have to
be taken to a repair shop for the adjustment
Posted on Jan 07, 2013
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Posted on Jan 02, 2017
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 top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension)
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 matter how much thread you pull, your thread is good. If that your machine passes that test, we can go to step 2. If not, try different spool of thread, do the 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.
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 20, 2009
on this condition,you can avoid wasting time and material try on this, the problem is your set up of tension thats why.,but you should follow upper theading. see figure,this just sample of exact threading,next bobbins set up see fig.the thread should be clockwise rotation on winderfollow this set up,and upon inserting be sure
you have clean feed dogs and shuttle race free from fabrics and threads chips.set dial tension to #3 to #4 and stitch dial to #12.then try this set.and you can watch on you tube sewing. try this stuff on internet address type www.youtube.com then on search box type sewing machine,have enjoy and have a nice day.don't forget to rate me,
Posted on Apr 14, 2009
it sounds like your bobbin tension is too tight. to adjust bobbin tension, remove bobbin case (remove needle plate first) and adjust bobbin tension screw on side of case until bobbin thread has a slight resistance as you pull it through the bobbin case.
this will be trial and error until you get best result. you should always try and match top and bottom threads. if the top thread is quite thick you may have continue to increase needle thread tension until balanced.
Posted on Jul 26, 2009
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