Sébastien Mischler (aka skarab)
Basically there are two very common techniques for SLA printing : DLP and LASER. Personally I find it unfortunate to monopolize a beamer for a printer, so no DLP here. Laser? why not but it is complicated to implement, (and dangerous), so no laser.
What remains? A more recent technique is to use a nacked LCD panel as slide and UV LEDs to cure the resin. Hmm not bad! No overpriced equipment, possibility to recycle old screens, simple to implement... Ok! we'll go with that.
Single LED setup (small screen)
LED's array setup (medium/big screen)
Prototype
SketchUp project : Download
Electronics
Simple electronics based on an Arduino board with Grbl firmware.
Software
- Slicer : http://lautr3k.github.io/SLAcer.js/
- Printer Controller : https://github.com/onlfait/uTopiaController
Slight disadvantage of using a 1:1 setup with an LCD screen is that the resolution of an LCD screen is more-or-less fixed at around .25mm per pixel. With the current geometry it will be difficult to get significantly higher resolution.
On the other hand, a projection might also be possible. Keep up the good work!