Build Your Own SLA/SLS

One thing I'm curious about is that the Peachy Printer is a bottom up printer which floats the resin on water and just lets the surface tension pull the resin over the top of the printed part without tilting or shaking the resin. Is this a viable option? Is there a resin with a low enough viscosity ...

I'm actually thinking right now about trying to build something similar to the peachyprinter idea, but with a projector and a better measurement for z axis control. My best thought so far is a 0-1psi pressure sensor. Using the same idea of constant water flow to raise the z axis but use pressure to ...