Be sure to install a brand new needle--check that the needle eye is the correct size for the thread you are using--a small needle eye will shred heavy thread. It may also help to remove the top thread from the machine, ALWAYS RAISE the presser foot and rethread from the beginning. Verify the thread path is correct. Try different thread--AVOID old or bargain bin thread. Check that the upper tension is not too tight.
If the top does not pick up the bobbin thread, the machine may be out of time.
Otherwise, there may be a burr or snag somewhere along the thread path that is catching and fraying the thread. Sometimes there is a snag in the bobbin area (possibly the needle plate or hook) that is rubbing the thread.
http://www.servicethread.com/blog/stop-industrial-sewing-thread-breaks
What Causes My Thread to Shred
Fraying Breaking Madeira
Testimonial: "Thanks for the advice. Tried all those things, only use good threads. Took the machine to local shop to get it maintained.It seems that the water soluble backing, that I use a lot, might be the problem."
SOURCE: Needle will not pick up thread from bobbin on a Brother's machine
This is going to sound silly but its one of the first things I check for... make sure that the needle is in correctly make sure that the flat side is towards the back as you place it in the needle clamp. better yet take the needled out all together and put a new one in just to be sure that it isnt bend
SOURCE: singer advance 7422....won't pick
It sounds like your timing is in need of adjustment and unfortunately you need special tools and know how. So, you have to take it in for service.
SOURCE: Brother innovis qc 1000 machine.
Also check your tension. I'm assuming you've recently oiled your machine, and that's why the thread is getting greasy. You'll need to get in all the areas the thread runs thru with a thin bit of cloth to absorb the excess oil, too. You probably inadvertently changed the tension settings while you were oiling the machine. Check the tension and adjust it-see if that solves your problem.
Good luck! Hope that helps!
did you get the needle in correctly--all the way up into the needle holder
& the flat side of the needle goes to the back of the machine
also after you check the needle & it's in correctly it's very possible that the machine is out of time & a sewing machine repair technican would have to retime the machine
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