Folks, this isn't about thread nests. And it's probably not about tension or holding onto the thread tails when you start a seam. I'm not sure what is the cause: thread path clearances, burrs on the hook, bad bobbins, humidity, or phases of the moon.
Take a look at the thread I linked to in the first line of the original post. On the second page, halfway down, I posted a photo. The thread is wrapped around part of the feed dogs or something under the needle plate. Usually it looks even worse because you can't stop quickly enough when it happens.
And it seems to happen only to Singer Slants, or at least I haven't heard anyone else complain of this affliction.
Tate
Last edited by tate_elliott; 04-29-2015 at 04:13 PM.