ok so my machine keeps doing this annoying thing where the thread spool or bobbin, maybe it is both, seem to slip....like jerk when I am sewing. The thread bunches in wads underneath the fabric but the top stitch is fine.
I think it is a tension issue, which I always have problems with the tension dial. I haven't figured out yet how to know what setting I should adjust it to for let's say a straight stitch vs a zig zag stitch.
Anywho! any help would be appreciated! it is driving me bonkers having to constantly rip out messed up stitches and re-thread and re-do everything to start over and it does it again.