Quote Originally Posted by curious aardvark View Post
Is that rook print in real time ?
Bloody impressive if it is :-)
So why does it bob up and down ?

So the resin. Is that daylight resin and if so, do you have problems with it setting in the vat ?

Other than worries about that, given the cost of resin, you'd not want any to go to waste - have to say it's a very interesting looking machine.

What's the build volume ?
I typed out a long reply yesterday morning, and the site said a moderator will need to approve it before it goes up, but it has been a while so I'll try again copying the post I wrote to the best of my memory.

The rook video is not in real time, it is sped up a quite a bit. The actual print time is about 1 hour and 15 minutes, I will make that clearer in the video description. The print time is actually determined by the resin. Lighter colored resins, like white, are cured faster by light than darker resins such as red. Lighter resins could cure in a second or less, and darker resins could take about 2- 3 seconds to cure (depends on layer thickness and brightness of the projector). I prefer darker resins, because they give you a wider range of usable settings to get great prints.

The build plate bobs up and down to release the 3D print from the vat surface after each layer. A big problem with DLP 3D printing is that the 3D print wants to stick to the bottom of the resin reservoir after each layer cures, and could destroy the print or cause errors. There are some fixes like tilting vats, non-stick silicone covered vats, and flex-vats (this type). The flex vat uses a clear non-stick sheet of FEP teflon film that is flexible so the cured layer never sticks.

Also, the resin is cured by light so leaving it out stored in the printer would probably waste it so I use a funnel to pour it back in bottle. I also remove the vat and put it in a ziploc back when I'm not printing with it, then I store the bottle of resin and flex-vat in a cool dark place so that no resin will cure while storing it.

The build size is 80mm x 90mm x 140mm, and the actual build plate is 51mm in diameter, but you can print larger than the build plate by using supports to offset the print from the build plate.