u/SneakyXho

I've heard people here explain that a 12v wiper is enough. I can't make the math work on that, though, or maybe my spec demands are excessive?

3.5kg is what I found as the bare minimum for linear force. Let's be cocky and stick to that.

Is 20cm of stroke length too much? It feels a little low, but I could be wrong.

And then I heard someone mention 250rpm, which is... impressive, fair enough.

By my math, that's barely within parameters, and that doesn't factor the inertia of a reciprocating motion at all, which should push it into nonstarter territory. What am I missing, what specs should I be expecting here?

Got me a Qidi Q2, and I am trying to figure out what filament I should be using, and what finish. I'd like to be quite a bit confident hygiene-wise, and am based in europe, if you have sourcing advice.

Thanks, all!

So, title! I'm looking for something more sophisticated than a straight circular shape, to figure out sizes. Plan's to print it in PLA as disposable prototypes, then move to vapor-smoothed ABS for the real thing.

So, ABS is a safe plastic according to the wiki here, and it's also a plastic that can be 3D printed.

Another thing it can do is be put in a jar with some cotton soaked in acetone, and then the fumes will melt the surface, making it melt into a smooth polish, like an injection-molded finish.

Now on one hand, sanitation definitely improves with a smooth surface rather than tiny ridges (or even the micro-scratches of sanding).

Does anyone happen to know if there's any safety issues with that, or is it acceptable/a good practice?