even the tiniest variation in threading can cause problems. Make sure you have followed the exact order, that all the threads are engaged in the tension disks and that the threads cross in the right direction. Bernina's(my opinion) are particularly hard to thread. Since my bernina was my third serger I sold it and kept the elnas.

movingwewst is right make sure the thread is settled into the disk properly and threaded through the machine right. also, it is important the order that you thread it. if you are looking at the machine you have two needle threads #1 & #2 then the lower and upper loopers #3 & # 4. you need to thread in a certain order. First thread #3 then #4, then #1 & #2. As you thread each one pull the thread to the back of the foot.

hope this helps

Bonnie

I just googled your machine and it looks like it's all color coded for the threading,so like the op said,make sure the threads are settled into the tension disks correctly.Good luck
Kathi

Thanks to those of you who have offered help. I will try again. I appreciate the encouragement.

SOOOOOOOOOOOOOOOOOO did you get it threaded and working properly???
Kathi

Are your needles inserted all the way in? That is somethimes the culprit behind loops and chains that don't form correctly.

Just a suggestion. If you do get it threaded right - and I hope you do - take a digital photo of it and take several. I think If I had had the camera back when I had my serger I'd still have my serger.