Hi,
I was using my Juki 5410 Needle feed with Coats Epic80 Tex40 without any issues. Now I swaped to bonded nylon Coats Nylbond 60 tex45 and the bobbin thread snaps while I sew. I start normal but during the sewing there is a noise as if the thread gets overstretched (stretching string sound) before it snaps. Otherwise the seam formation looks fine.
The bobbin was inserted anticlockwise.
Thoughts?
Thanks