Build Your Own SLA/SLS

I'm using marlin to control a laser to cure the resin (top down approach). Can someone tell me where I can make adjustments in the slicer so that it will drop the build plate every layer and immerse the part in resin, then bring it back up for the next layer?

How can I go about this?

Thanks!!

Thanks Steve,

I may already have figured out how to do it. In Slicer you can insert commands before or after every layer. BTW, can creation workshop slice the STL using the slicer engine to produce gcode? was hoping it could run regular repraps too to make it easy to convert repraps to laser sla.