DLP/LCD Test Print

[cliffyk]

Thinking this over further while dealing with my insomnia--it occurred to me that pictures are = 1000 or more words--so...

Using FreeCAD I created a single cone with a 0.3 mm base diameter and 0.6 mm height, then exported it to an .stl file and sliced it with Chitubox with  20 micron layers.

Examining the sliced .ctb file with UVTools (which would not properly display the layers) I was able to retrieve a visualization of how it would print (keep in mind we are building this cone of mushy little 0.05 x 0.05 x 0.02 partially cured "bricks" of resin:

Here it is in FreeCAD:



in CHITUBOX:



and in the UVTools print simulation (not pretty, it appears to be only 12 layers as the "inline" 20 micron layers stack up):



In the actual printing process the uppermost layers I suspect each, comprised of just a half-dozen or so "mushy little bricks", cannot survive the stress of being torn away from the FEP and are just left behind as detritus in the resin vat.

I am not intimate with DLP resolution or specific process, perhaps it could do this better?