Is there a way to prevent or reduce this effect? I seem to notice it more on my 1/8" bits, which I thought was due to cheap bits but I just tried a Kodiak bit, which wasn't pricey but also not cheap, and got the same effect. This is a mating piece so when I try to sand them off it of course doesn't line up as nicely as it should. The one other difference right now is my 1/8" bits use a 1/8" collet where all my others are 1/4" shank, but I'm not sure how that would leave ridges. Am I cutting too deep per pass and deflecting the bit? It appears this way all the way around the piece so I don't think the gantry is skewed.
I assume a finishing pass would help remove this, perhaps I should just bite the bullet and use Fusion360 for this.
Edit: 1/8 quare upcut bit being used. This is the one that produced that picture, https://www.amazon.com/gp/product/B0070YYL40/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1