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Time to get serious. Let’s try something that looks like a tire. 20% infill. Basically a spur gear with a shallow chamfer and large bore. If this works well I’ll design some treads.
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I think the inner v-groove in first tire was too aggressive. This one has a flat inside profile, but I suspect if I want a gentle concavity to fit a barrel-shaped hub, it'll work fine. The stringing was caused by the v notch. And I don't think supports are a good idea with TPU
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I honestly didn't think I'd be able to get this right... I ordered several sets of toy wheels, expecting I'd have to buy rather than build, but my rover is going to have made-from-scratch wheels
Success Kid Is Successful! GIF
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Yesterday’s success with TPU inspired me to try PETG again. Tried TPU settings (slower movement, overextension) but that didn’t extrude stop all! Realized overextrusion is for soft filaments and PETG is stiffer than PLA. So dialed that back and just used lower speed. Worked ok.
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