I am working on a experimental prototype, SLA 3D printer it is about the size of a refrigerator. It will be used for large scale manufacturing. Right now I am running nano DLP software on it, but it is lagging professional design and speed.
The basics of how it operates is this: a STL file is uploaded into the raspberry pi, it is then sliced and a G code is created that corresponds perfectly with each image layer. Gpio pins are then used to send a single over to the stepper motor controllers for the z-axis. The HDMI port on the PI is used to send the images to the UV projector, a single is also sent to turn on the projector. A Arduino is connected via USB and it is used to control a wiper motor, and resin pump that lays new resin for the next layer. A second Arduino is used to wash down the product after completion and turns on a relay for UV lights to cure the product, and a speaker will play a beep when cycle is complete. I'm happy to continue using Nano DLP software, if that can keep the price down, but if you think it would be better to start over I'm willing to look into that option. I'm open for feedback on changes that could be made.