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Carbon3D – 3D Printing via Continuous Liquid Interface Production

carbon3d.com

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Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#71

Post by jonnycowboy »

jonnycowboy wrote: post #64
crocowhile wrote: post #48

I am just a bit sad that this is going to be a commercial venture protected by Intellectual Property. IP is the reason why filament extrusion is so widespread and cheap for DIYers compared to SLA.

Don't worry. IP protection is only for commercial ventures. Once the details are well understood by hobbyists, you will be able to build one yourself with no worries of infringement. That said, I'll hold my breath until somebody replicates the optically transparent - oxygen permeable membrane (I guess it is some kind of "holed" plastic or glass, with a goretex-like coating on one side).

Correction - the oxygen permeable surface is Teflon AF 2400 which is available commerically: http://www.randomtechnologies.com/ The spacer (initial seperation between window and glass build plate) which determines resin thickness is 8 mil (200 um) aluminium shim stock. The projector looks like a UV projector: http://www.ti.com/devnet/docs/catalog/thirdpartydevtoolfolde...

That should be enough to get anybody started!

Too bad the Telfon for a 10"x10" bed, 100 um thick would be 750$ (10 grams at 72,000$/kg).

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#72

Post by andrewmb »

darkmighty wrote: post #35
andrewmb wrote: post #33

The website is pretty and the copy is tight, but it's nothing pathbreaking in terms of fundamental principles. This is just bottom-up UV-DLP SLA with a new twist: taking fuller advantage of oxygen permeable materials for the vat to eliminate the recoating step and get to continuous printing. A similar idea was tried, the ill-fated Solidator used a pressurized vat bottom with a permeable membrane. Though from what I k…

The speed and smooth ascension are actually game changers imo.

Agreed. I have a more or less exact idea of what they're doing just from the concept description as I design resin-type 3D printers at my day job. I know this concept has been tried, I think they're just the first ones to have gotten it to work.

The other thing to note is that this only works with a certain subset of polymerization reactions--not all polymerizations are oxygen inhibited so if they want to move into truly water-clear and UV stable materials this design won't work.

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#73

Post by jonnycowboy »

8dad6bea wrote: post #27
8dad6bea wrote: post #24

See the paper in Science released online just now: http://www.sciencemag.org/content/early/2015/03/16/science.a... It will apparently be the cover story. (Does this count as Sequoia breaking Science's embargo?): https://twitter.com/sequoia/status/577651625545748480 From the abstract: "...feature resolution below 100 micrometers. ... complex solid parts can be drawn out of the resin at rates of hundreds of millimeters…

The supplementary materials, including 2 videos showing printing in real-time (keep watching, they slow down), are available without a subscription: http://www.sciencemag.org/content/suppl/2015/03/16/science.a... Movie 1: http://www.sciencemag.org/content/suppl/2015/03/16/science.a... Movie 2: http://www.sciencemag.org/content/suppl/2015/03/16/science.a...

I didn't see in the supplementary materials, does anybody know if they are using a pressurized air or oxygen source to increase oxygen flow through the membrane? edit: to repond to my own Q: they can use both pressurized oxygen and pressurized air. Using pressurized air decreases the dead zone but still very workable.

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#74

Post by tim333 »

sova wrote: post #41
allending wrote: post #39

Earlier quoted context omitted.

That's fascinating but a bit out of my depth. Do you have any references that a newbie to 3d printing should look at before taking the plunge?

it's like a laser printer but instead of toner it uses gooey resin. project (in UV light) a shape on the bottom of the goop and it will start to solidify in that shape (once it touches oxygen)... so gently pulling some solid surface goop out gets you to the point where you can "print" stuff! Pretty cool! It's not clear to me if the resin solidifies only on contact with UV light and the oxygen level is controlled from…

I think the oxygen prevents solidification which is what stops the object from sticking to the screen they project the image on to. By the looks of it the oxygen just diffuses from the air through the screen.

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#75

Post by gonoobie »

I was just about to purchase my first 3d printer (Lulzbot Taz 5), but this gives me pause.

As runner up to the coolest 3d printing technology I've seen recently, check out the Mcor Iris:

http://mcortechnologies.com/3d-printers/iris/ https://www.youtube.com/watch?v=hh3McRQi6II

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#76

Post by nakedrobot2 »

Kliment wrote: post #53
crocowhile wrote: post #48

I am just a bit sad that this is going to be a commercial venture protected by Intellectual Property. IP is the reason why filament extrusion is so widespread and cheap for DIYers compared to SLA.

I agree, and it is sad. Well, in 20 years when the patent expires we can finally get some progress on this tech, just like when the patents on filament extrusion expired the costs went down two orders of magnitude and print speed and quality up one order of magnitude in the space of a couple years. Until then it's going to stagnate.

20 fucking years. I'm sorry but this is so hopelessly obsolete, it is outrageous. Is there any hope for this to be universally reduced to say 5 years in the foreseeable future?

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#77

Post by blisterpeanuts »

Wow, that's an impressive presentation. I'm interested in the tech behind that website; can anyone suggest how it was done? I see several elements that are in vogue:

Scroll down slightly to reveal top menu bar Animation at the top Scroll down and a left frame of animation appears, while allowing scrollable text on the right. Scroll down more, left animation disappears, and we find an embedded Youtube video.

Where can one read more about this type of design, such as online tutorials and the like?

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#78

Post by tdaltonc »

gavazzy wrote: post #63
crocowhile wrote: post #48

I am just a bit sad that this is going to be a commercial venture protected by Intellectual Property. IP is the reason why filament extrusion is so widespread and cheap for DIYers compared to SLA.

If it weren't for patents, they likely wouldn't have spent $40million developing it. Someone would reverse engineer it and then launch a Kickstarter and sell it without having to spend the R&D cost.

That's what academic engineering labs are for. The state foots the bill, and everyone gets to share in the progress.

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#79

Post by doczoidberg »

blisterpeanuts wrote: post #77

Wow, that's an impressive presentation. I'm interested in the tech behind that website; can anyone suggest how it was done? I see several elements that are in vogue: Scroll down slightly to reveal top menu bar Animation at the top Scroll down and a left frame of animation appears, while allowing scrollable text on the right. Scroll down more, left animation disappears, and we find an embedded Youtube video. Where can…

you can realize things like this with a scrollspy. E.g. that from bootstrap: http://getbootstrap.com/javascript/#scrollspy

Re: Carbon3D – 3D Printing via Continuous Liquid Interface Production

#80

Post by 542458 »

brador wrote: post #44
FrankenPC wrote: post #36

This is going to take off like a rocket. It's genius. Maybe some chemistry/materials engineer can figure out ahead of time how to take a polymerized object and convert it back to a usable resin. Really, we have to start analyzing the end product for recycle-ability before the tech explodes.

Agreed. This is more like what I want from 3D printing. The smelly ABS 3D printers were never really suitable for indoor use, but this I can see myself using!

> The smelly ABS 3D printers

Don't kid yourself. The photopolymer resin used here still has a noticeable odour, which is in many cases worse than ABS.

PLA filament, on the other hand, has very little odour.

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