Build Your Own SLA/SLS

The host computer doesn't need much horsepower for the arduino communication with CW but it does need some graphic power to create/load/display the images. I was going down the RPi route but decided on just using a mini pc tablet which works great with CW:
http://tinyurl.com/pmtf2dn

Awesome, I can't wait to see more...

I thought the big guys use a wiper system (and a laser). I'm not sold on the film as that is my biggest issue with my bottom-up but I hope you prove us wrong (adherence issues, stretching on larger parts/heat, degrading over time, increasing exposure time).

Ahhh, now I get it. So its like a flex vat on a bottom-up machine but everything is upside-down. Do you have any issues with sticking to the teflon instead of the build platform? This is the biggest issue with bottom-up. Very intriguing.
Dan

Very nice design. Can you explain the tilt-up box? Also a quick overview would be appreciated.

I don't see a problem with it. Maybe placing it in the Buy/Sell section would have been better. Nothing wrong with trying to make a couple bucks. If you don't want it, don't buy it. Some people don't mind paying a little to have things handed to them. I have paid for plans for some diy machines just...

Make sure your 'top' nut is press-fit or otherwise cannot come out of its holder. Now you will need a mechanism to attach your nut assembly so it only moves in the z direction (linear slide, etc). As you have it now it will just rotate on the shaft until the build platform hits something. Also your ...

Secure one nut so it does not move in the z direction at all and no rotation. Allow the second nut to move in the z direction but no rotation.

Personally, I would never go back to silicon after switching to a flex vat.

There are lots of projectors out there that need NO modifications. The mUVe recommends:
ViewSonic 1920×1080 PJD7820HD
ViewSonic 1280×800 PJD5533W