Loopers jamming I,ve got a lumina overlocker, the upper looper and lower looper are not jamming against each other, I can,t use the machine please help, I,ve tried oiling the machine and even pushing the loopers but it then catches the needle cause it's not aligning properly, I,ve put it back now but it's still jamming

SOURCE: timing off on my 104d

I had to fix my machine last night because the looper was not grabbing the thread. We advanced the belt that turns the shaft (which connects to the looping mechanism) by one tooth and it solved the problem. We actually advanced it two (accidentally) the first time and the needle was catching on the bottom. Basically, the timing was off... the needle shaft was raising before the looper had time to grab the thread.

Not sure if yours is the same situation, but might be worth a look at the timing.

(My machine is a New Home My Excel 23L if that matters)

SOURCE: thread continually breaking in lower looper needle

I was having this very same problem with my lower looper . I had been using the one needle stitching all afternoon and I was doing quite nice stitching. then I decided to put the right needle back in and do some overlock stitching and guess what I spent the next two hours fighting the looper problem. I had completely re-thread this machine at least 20 times now. I decided to take the needle out and re-insert it and re-thread it one more time (right lower looper- then upper looper- right needle- then left needle) was careful to pull all threads to the back and under the presser foot for about 6 inches.
Held on to the thread, lowered presser foot and did the chaining stitch. BINGO it didn't break, tried it with a piece of cloth and Perfect stitches. I have a Babylock BL402 and used tension settings left to right
4-3-3-3 and default settings for the rest.
Hope this helps someone someday.
Jo Griffith

SOURCE: I have a singer Overlock

Yes, it can. What do you have your differential set at? Try it in the middle and see if it makes a difference.1 is usually for overedging, 2 is usually for easing in a sleeve, etc. I have my tensions set at 4,4,4,4, stitch length at 3 to 4. Do not be afraid to try gradually changing the tensions, but do them one at a time, that is what I did and finally got it.

SOURCE: After threading the machine and

have you checked the tension on the looper thread to make sure it's not to tight

are there any burrs on the loopers or in the area of the loopers where the thread come in contact with the thread?