Can only sew for less than a min. upper thread shreds and jams up Using 18 needle and size 92 thread
Without seeing your manual it's hard to tell for sure, but it is likely that your needle and thread combo is causing the problem. Another thing can be a burr or nick on the presser foot or needle plate. First change change the needle to a different one in size 18. If it still shreds we no it is probably the needle... size up to a 20. If it works... you are good to go.
If that doesn't work... take off the presser foot and examine the needle plate for burrs, stab marks, chips. Also examine the presser foot.
If you find a defect carefully smooth that with some very fine sand paper. and try sewing again.
Good luck
SOURCE: Needle Thread breaking after about 30 seconds of quilting
Make sure the feed dogs are dropped (or feed dog cover is on - I can't remember which way this machine works). The stitch length on the machine has no function so ignore it. (I set it to zero so the machine doesn't have to work as hard). Hopefully this is all that's wrong. If not, use a shorter setting for the stitch length on the regulator, oil the hook and move slowly and smoothly.
Good luck!
SOURCE: which way to put the needle in the Juki, The
The indent is called the scarf.
The scarf will be at the 3 o'clock position and, if you look closely, you will see the hook pass the needle at the scarf.
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: I recently purchased a Juki
perhaps you have the wrong needle or its not in the proper position?
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I have a Juki 1541S that seems to have developed shredding problems. I think I have found the answer! I noticed that the thread TWISTS rather than shredding but the results are the same; the thread breaks.
All of my thread is Z (left) twist AND I NOTICE THAT THE TWISTING UNRAVELS THE THREAD and the buildup at the needle gets to be a fuzzy bundle of thread prior to breaking. Most machines use the Z twist. I don't have any S twisted thread BUT I do have a roll of very good BONDED thread that DOES NOT TWIST and with that in my Juki, I no longer have so called shredding problems.
Hope my experience helps others because this stinking problem has haunted me now for weeks. Spent countless ours adjusting the machine to no avail. So yourselves a favor and either insist on good bonded thread or S (right) twisted thread. Oh the thread I am using with excellent performance is American & Efird's Sunstop N-WCK Bonded T-90. The roll also has printed on it UV SO-JT BLK.
This thread has an excellent bond and I cannot untwist the thread with my fingers.
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