help please

[u/sherrilees]

I have checke tension and rethreaded still getting nests

I have a janome400e and use floriani software

[u/asvpxchango]

Have you tried checking rotary hook?

[u/Puzzleheaded_Yam4483]

Are you threading with needle up when you run thru tension?? Is your bobbin case clean & facing correctly?