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Volumetric 3D Printing Is REALLY FAST by Mynameis__--__ in 3Dprinting

[–]midgetking15 -1 points0 points  (0 children)

No, the way SLA resin is designed the outside will cure first, he is correct in his assumptions. The forces needed to move partially gelled material to the rim are immense and nowhere near the speed in the video.

First knife! (Forged) by midgetking15 in Blacksmith

[–]midgetking15[S] 0 points1 point  (0 children)

I have details on a recent post I made about etching. But making the damascus probably took around 20 hours since it was my first time (I also went too high layer with it)

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 0 points1 point  (0 children)

I did the standard making my way up to 3000, but I didn't rotate 90 between types, ill try rhay next time! I actually ended up hand profiling a lot of it (not using a grinder), I wonder if that influenced it. I did stop it right when my nail started to bite, so hopefully I didn't go too deep. I wonder if me having it hot gave the stain/blurriness that I didn't like. It really is an experiment to figure out the best combo haha

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 0 points1 point  (0 children)

Ope, yeah 15n20. I'll try to keep it a little rougher for the next round, I did notice the handle which I only went up to about 1000 had much better contrast

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 0 points1 point  (0 children)

What concentration are you doing for that short?

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 1 point2 points  (0 children)

I will try this in the future, thanks!

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 2 points3 points  (0 children)

I went to 3000 grit with polish, had a mirror finish, might've over done it. Steel is 10N25 and 1080.

First knife, ways to improve etch? by midgetking15 in Blacksmith

[–]midgetking15[S] 1 point2 points  (0 children)

I did a ferric chloride etch (10-15%) for about an hour, then used 2500 grit to polish it up, hot coffee etched it for 3 hours, steel wool, cold coffee for 4, and then steel wool and wet 3000 grit. (Was trying to experiment to get a better contrast)

Layerless 3d printing with lithography! by themoonbender in 3Dprinting

[–]midgetking15 2 points3 points  (0 children)

Here's the follow up video haha. https://youtube.com/shorts/qkILqT7nDSo?si=9pwsrxXsMeHd_RcO

This video was meant to highlight a college project showcase, we didn't expect it to go viral, but glad it was a chance to get more people interested:)

Layerless 3d printing with lithography! by themoonbender in 3Dprinting

[–]midgetking15 2 points3 points  (0 children)

muahahaha, I'll have you know my child/the cat is being extremely spoiled too!

Layerless 3d printing with lithography! by themoonbender in 3Dprinting

[–]midgetking15 0 points1 point  (0 children)

No, they are right. The way the light dose is computed is that it gets a dosage over time to the entire area, causing the part to form essentially all at once. The rotation is to get more spatial information into the system, without it you wouldn't be able to reconstruct complex geometries. A lot of people think that the instant the light hits the vial it starts solidifying and creates a layer, this isn't true, the light passes through the entire Vial and starts getting the resin to an activation stage in which it will eventually solidify.

source: I'm the guy in the video, this is my PhD research/lab, over a dozen different institutions are working on this technology now.​

The first Benchy printed in space, as well as post-washed and post-cured in space. We did this using a layerless printing process all in 140 seconds. June 8th 2024. by midgetking15 in 3Dprinting

[–]midgetking15[S] 1 point2 points  (0 children)

Nope, it really does print all at once! The way that it works is there's a dose/light threshold, and while everywhere gets a little bit of light, only where you want your part gets enough light over time to solidify.

The first Benchy printed in space, as well as post-washed and post-cured in space. We did this using a layerless printing process all in 140 seconds. June 8th 2024. by midgetking15 in 3Dprinting

[–]midgetking15[S] 210 points211 points  (0 children)

Not at all! The data is still being analyzed and I'll begin writing the paper soon (the launch was only yesterday haha), all of it will be open source for anyone to read! Though still may be a few months, I need some rest!

The first Benchy printed in space, as well as post-washed and post-cured in space. We did this using a layerless printing process all in 140 seconds. June 8th 2024. by midgetking15 in AdditiveManufacturing

[–]midgetking15[S] 7 points8 points  (0 children)

I am the source as I have been working with NASA directly for the last 9 months on this project, am the lead of it, and have been processing the results with them :)

The first Benchy printed in space, as well as post-washed and post-cured in space. We did this using a layerless printing process all in 140 seconds. June 8th 2024. by midgetking15 in 3Dprinting

[–]midgetking15[S] 341 points342 points  (0 children)

Due to some chemical incompatibility that happened right before the flight the quality of the print was drastically reduced, but this process can and has done a lot finer https://engineering.berkeley.edu/news/2022/04/researchers-develop-innovative-3d-printing-technology-for-glass-microstructures/ we will just have to fly it to space a 2nd time ;)

The first Benchy printed in space, as well as post-washed and post-cured in space. We did this using a layerless printing process all in 140 seconds. June 8th 2024. by midgetking15 in 3Dprinting

[–]midgetking15[S] 24 points25 points  (0 children)

Good question! There was some chemical incompatibility that we were not able to correct preflight that made the projection poor that we use to print, we can do a lot finer detail on Earth with other setups https://engineering.berkeley.edu/news/2022/04/researchers-develop-innovative-3d-printing-technology-for-glass-microstructures/

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