Originally Posted by
azwendyg
It looks to me like your top thread may not be actually in the tension disks, or your bobbin tension is way too high. If it was just a speed issue, those eyelashes would be more prevalent around the curves, but yours look fairly consistent throughout.
Yes this above what Wendy says.
Also it seems every machine is different. It took me years to figure out the best setting for the Janome 6500. It ended up being that I have NO problems if I leave the feed dogs up with that machine. I also do better with a slightly thinner/lighter thread in the bobbin then the top or a lighter thread in both. When quilting I also use a top stitch needle 90/14. It made a big difference for me. Maybe you can post what machine this was done on.