You have thread in your bobbin case. try spraying wd 40 and let it soak overnite then try to force the wheel. not to hard because the hook will pop out of the finger with the protrusion that goes in a notch in the hook case, in most cases u won't be able to see the thread thats jammed. you may have to take out the hook. next time you start sewing make sure the take up bar is threaded!!!
SOURCE: needle won't pick up bobbin thread tried cleaning
Hi,
did you clean the bottom bobbin area thoroughly? Remove the cover plate and bobbin reel, look for debris. Any left over cotton will cause problems, after you clean it spray some wd-40 on all moving parts.
Thanks
Adam
please leave me some feedback
SOURCE: Juki DDL-8700--top & bobbin thread won't hold together for stitch
What bobbins do I use on a Juki DDL-8300
SOURCE: My juki hzl35z will not pick up the bobbin thread suddenly! Help!
Upper thread breaks
needle may be in backwards
Raise the needle bar to the highest point, then loosen the clamp screw to remove the old needle, place the new needle in the clamp with the flat side to the back of the machine
round needle--the groove in the needle should face away from the shaft.
Push the needle all the way up to the stop or as far as it will go, then tighten the needle clamp screw
upper tension may be to tight
the needle may be bent or damaged
thread may be hanging up in bobbin case--check area for loose threads or lint
try changing the needle to one that will work with heavier thread
you may have to change the bobbin to heavier thread also
try adjusting the tension also
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