Build Your Own SLA/SLS

You'll need to measure the projected size of the image onto the surface of the vat bottom (or top of resin if it's a top-down). Then, you can enter those numbers into the machine profile and Creation Workshop will calcualte the rest for you based on the projector pixel size.
-Steve

Along with what Steve mentions, the distance from your projector to build surface depends on the throw of your chosen projector and if you have any additional optics added. CW has a nice calibration feature.

You'll need to measure the projected size of the image onto the surface of the vat bottom (or top of resin if it's a top-down). Then, you can enter those numbers into the machine profile and Creation Workshop will calcualte the rest for you based on the projector pixel size.
-Steve[/quote]

hey pacmanfan, how to measure the projected image size on vat bottom ? is it by ruler or anything else? & where to enter these numbers ?

I think that would be here

Could somebody help a little more with this, I know I am late to the thread.
I have an Acer H6510BD (uv shield and color wheel removed). It's native resolution is 1920x1080.
If I want a 100micron XY print, I divide by 100 (one pixel per micron) and get 192x108mm.
When I put that in the Build Size (as seen in the pic attached above) and then hit 'calibrate' I get a grid from the projector.
I have printed a grid in centimeters (I checked with a ruler to make sure there was no scaling) on a piece of paper.
I put the projector zoom in the center and adjust it's distance from the paper until the projector grid lines up with the paper grid.
This puts the projector about 8" away. Does this sound correct?

I'm not sure how to make a higher resolution print, though.
If I want to make the print twice the resolution (50micron, 96x54mm), do I put the projector closer? Then scale the model up 200% to compensate?