The ones I know about used two beams of light at 90 degrees (stereo) and only where the two beams met did it harden the liquid. Otherwise you cannot make parts that have hollows, pockets, holes.
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Huh. The one I saw had a single beam (IIRC) that hardened the top border of the object, then the stage lowered one step...lather rinse repeat. One of the standard demos was to make a hollow sphere which, if they didn't leave a drain hole at the top or bottom, was full of still-liquid resin.
About the only thing I can think of that would quietly kill humans and pets inside an enclosed area that's NOT CO would be oxygen deprivation-- which is also highly likely with any sort of propane, NG or kerosene heater inside. Most newer propane and NG heaters have 02 sensors that will extinguish the pilot light if 02 levels get low, not sure about kerosene heaters...
The machine I am familiar with used 2 lasers like John said. This was probably 10 years ago.
The two laser versions are the same as my old inside carving laser I had for doing glass block ornaments
The new resin printers only use one and the tray of resin moves up as it lasers the underside
I went to their forum and see that Dan will not release any up dates to when they will ship due to competitors may get some information. Sounds like another stall so people don't pull their money and buy another brand.
So, when does announcing a possible shipping date fall into the realm of 'industrial espionage'? good grief...
That is what a lot of people that are on the forum are asking
I Still say they'll NEVER ship any quantity!
And this continues to move towards a bankruptcy!
Not releasing information that you said you would be doing on a regular basis?
Yep Stinks pretty bad. I'd be yanking my funds out like now!
And what competitor is doing anything but LAUGHING at them?
yep bankruptcy. DS is in the Bahamas sippin umbrella drinks with 45.000,000$ laughing
Well they're operating comfortably on investor seed money and have all the income from pre-orders earning an estimated .75% interest. If they go bankrupt it's going to take a REALLY long time. More than likely they'll have shorter delays going forward, but I expect they'll ship all their orders.