Originally Posted by
NJ Quilter
Don't know anything about Juki's but is it possible there is some miniscule piece of thread stuck in the bobbin area somewhere? Have had that problem create issues on other machines mimicking a tension issue. Finding that itty bitty piece of thread solved the problems.
This was my thought - I've had this happen too. Just a tiny bit of thread lodged in my bobbin case; I think it was letting the bobbin thread sort of jump out of its groove now and then and giving me all sorts of weird and inconsistent stitch problems. (Mine is a Janome)
I hope you can figure it out!! Nothing worse than when something is broken but mysteriously fixes itself for the repair guy.