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steriolithography[1] is neat, and i think older than deposition style printers. This is kinda wacky. Rather than a conceptually simple layer by layer approach,
by jfoutz 8y ago
steriolithography[1] is neat, and i think older than deposition style printers.
This is kinda wacky. Rather than a conceptually simple layer by layer approach, this has this funky convolution. they're getting it for free with the simple rotation. You can kinda see how bulbous that airplane model is, because some finer details get 'overexposed'. i bet, if they could rotate 10x around 1 axis and 1x around another axis, that tumble would sharpen up some of those edges, since you wouldn't be baking the same adjacent space so much.
Think about a 6 sided pencil. if you just rotate around the main axis, it's probably going to look pretty round without the crisp hexagon sides. but if you can also rotate around a minor axis, you could also project just the hexagon shape for a while and still preserve the cone of the tip of the pencil since most of the solidification came from the sides.
There's an opportunity for deep optimization there. Seems tricky. but pretty cool.
it's almost like pca. what projection (or series of projections) maximize hitting the target, and minimize the overbaking, all while taking into account the characteristics of the resin. maybe you can let it cool for a bit, and have more freedom to expose without hardening.
also, not a replicator. this is just one _fabulously special_ super material you mess with, not metal and plastic and cloth and fur and chitin and whatever.
[1] https://en.wikipedia.org/wiki/Stereolithography https://en.wikipedia.org/wiki/Stereolithography
- Franciscouzo 8y agoI don't think it would be possible to rotate around another axis, the printed object would start tumbling around the resin. If they rotated the projector instead of the resin it would be possible.
- eveningcoffee 8y agoCorrect. Their problem is that the projector they are using is projecting a 2D plane. It would be a different story if it was a circular projector (think of a LED strip). It has to be then rotated only along a single axis. Turning the projector circle physically can possibly add additional precision. Magnetic fields can be used to keep the container sphere in place. I am now going to take the screenshot of this conversation and send it to my self in a registered mail.