Anybody else following the new "CLIP" resin printer tech?

[jimustanguitar]

forum.seemecnc.com/viewtopic.php?f=92&t=7955

I've been reading about this for a few days now, and I can't tell if it's a miracle or marketing... It sounds entirely plausible that an o2 permeable vat would facilitate different kinds of photo-chemical reactions, but there are a lot of folks that sound skeptical about that being so revolutionary...

Have you read up on it yet? What do you think?

[BeeAmaker]

I would defiantly keep an eye on it. I'm wondering if they simply eliminated the up-down-up-down motion and created a faster cure time resin. The up-down eats a lot of time. Might only be a fraction of a second, but add it up for each layer and it becomes hours.
Eliminate that and you cut your print time in half. Add a faster cure resin and reduce your time to print even more.

The don't' really explain well how the "oxygen window" works. So I'm skeptical of this being anything "new" but rather a more efficient way to do the same thing. So they add a "secret ingredient" to gain a patent.

Definitely cool in any case - hope it reaches desktops soon!

[DanWake]

As I understand it, an oxygen-rich area at the bottom prevents the resin from curing right next to the glass. This allows for the liquid resin to flow right in since there's a gap between the glass and the hardened area.

[sgraber]

Oxygen inhibition of free-radical cured systems isn't new. It's a well-known mechanism: oxygen acts as a free-radical scavenger, inhibiting the cure of the (meth)acrylate pendant groups initiated by the decomposition of the photoinitiator into free radicals. Typically this inhibition is mitigated by using an inert environment (such as blanketing with a gas such as nitrogen or carbon dioxide) or by using a photoinitiator that is specifically designed to react so fast that it essentially out-competes oxygen inhibition.

I will say I was skeptical, but now I believe their claims are plausible after reading their journal article on the technique. Essentially they're using a *very* thin sheet of Teflon AF 2400 (0.0026 in thick / 65um), which is both UV transparent and has a very high oxygen permeability. While it works, AF 2400 is NOT cheap.

In case anyone wants to read the actual journal article:

www.dropbox.com/s/jpgn0d1d7cgvkv4/continuous%20liquid%20interface%20production%20of%203d%20objects.pdf?dl=0
www.dropbox.com/s/gy00zt3vhoq8v2q/Tumbleston.SM.pdf?dl=0

[jimustanguitar]

JK, that actually does make some sense to me

So their innovation is just a different vat, essentially? (and a change in process/gcode)
According to the SeeMe link that I posted, it's a rather cost prohibitive material at the moment. 

[sgraber]

Yep!

[navkram]

google.....please translate sgraber post to english speak.

[jimustanguitar]

"Carbon" printer explained by the creator.

[BeeAmaker]

So we just need to find a very large contact lens.

[jimustanguitar]

Some other membrane ideas:

www.kordon.com/kordon/products/aquarium-pond-accessories-2/breathing-bags#suppliers!
www.ebay.com/itm/50-7-X-10-Ultimate-Breather-Bags-KORDON-ALTERNATIVE-/301685756116?pt=LH_DefaultDomain_0&hash=item463ddf50d4
www.sigmaaldrich.com/catalog/product/sigma/z380059?lang=en®ion=US

(credit goes to forum.seemecnc.com/viewtopic.php?f=92&t=7955)

[BeeAmaker]

So are these plastic bags safe for little kids to play with?

[jimustanguitar]

3dprint.com/88933/gizmo-3d-printer-smooth-print/

They mention some interesting software here. Posting to save for later.

[sgraber]

Yeah, they can't have thick walls or a complete solid part otherwise their tech won't work. They have to do thin walls and thin supports unfortunately...