Thank goodness I have been using a practice sandwich!
I'm getting that clunking noise and major ... MAJOR ... globs of thread on the bottom.
I've done all the suggested steps ... rethread both top & bobbin; tension up, tension down; changed threads;
It is so frustrating!
Is there a CLASSIC reason for the giant loopy glob of a mess of thread on the back???
Oh, & it definitely is the TOP thread that is coming through making the mess.
Thanks for your help,