I took a few measurements off the micrographs of the most recent "Hello World" and got some data points. First, if I spread a thin film of Nail Art resin as thin as I can without leaving any wrinkles in the surface, the film is about 50μm thick. Any thinner and it starts to glob. I can spread such a film over at least 2mm x 3mm.
Shining UV from the 125/9 fibre a few microns above the film surface causes the resin to cure in the following pattern:
I am advancing the UV fibre along the surface at 2μm/sec. This gives some idea about how simple, flat structures such as folding frames may be designed. Obviously not very high resolution, but I suspect would be a fair bit faster than building something from single layers.
Unfortunately I am dragged away from the workshop once more and cannot conduct further tests on building layers with the fibre probe immersed in resin. My current theory is that it might be best to make the first layer several microns thick, which would effectively level the first layer. Then subsequent layers can be made a couple of microns or less thick.
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