Wont catch bottom thread
Please change your needle. It is likely that the one you have in the machine is either not fully seated into the needle bar... or it is bent or damaged in someway. Also please double check to make sure the needles you are using are suitable for your machine.
SOURCE: Bottom thread will not catch
Unplug the machine and remove the needle plate so that the bobbin case if fully exposed. Lift out the bobbin case and the cup that it sets in will be visible. Locate the "hook" on this cup. It is a finger with a sharp point at the upper edge of the cup. The hook is what grabs the thread from the needle while sewing.
If the hook passes by the needle AFTER the eye of the needle is above it, you timing has slipped and the machine must be taken in for repair.
If the hook catches the thread from the needle, put everything back together and try threading again.
SOURCE: bobbin holder keeps catchin thread
Try re-threading, make sure the presser lifer is up so the tension discs are open and the thread will go into them. It sounds like you may have missed either the upper tension discs or the take up lever.
A drop of oil on the hook wouldn't hurt if you haven't oiled in awhile.
good luck!
SOURCE: Sewing Machine (brother XL 3200)
You may have the bobbin case in wrong. I have this machine, and I know that it is really easy to put the bobbin case in wrong. Try taking it out and making sure that the little stop is in the front and it is seated down in there and able to wiggle back and forth. My experience with this machine, until the other day when my cat knocked mine off the table and knocked something out of alignment, is that it just works. Any time mine hasn't worked, it has either been dirty, needing oil, threaded wrong or the bobbin case wasn't seated right. In other words, it has always been my fault.
SOURCE: Needle not catching thread
im no expert, just been sewing for many years, i use 2 different juki machines, i suggest looking at the needle, are we sure you have the rite size? 135/ 140? did the needle just get changed? it could be the correct one, but if its in backwards, there isn't a dimple to let the hook behind the thread, to catch it, feel free to call me, 239-895-4845, my name is devin, shop is Quality Auto Trim Inc., ill try to help you over the phone if necessary, good luck
SOURCE: When I turn the knob
Have you removed the bobbin case to clean it? If so, it probably needs to be reseated. Remove the bobbin. Take out the case and reinsert it. If you can't get the bobbin out easily, there is probably thread clotted up somewhere under the feed dogs. I usually gently rock the handwheel back and forth as I brush the bobbin case area to begin dislodging the "clot." It also helps to remove the throat plate so you have a better view of the mechanics under the feed dogs. You'd be surprised at all the goop that can be caught but you can't see. If you do find a thread clot, use a machine brush and tweezer to gently remove each thread bit. I really hope this helps you. If it does, please come back to Fixya and rate my advice. Thanks!
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