![]() ![]() When these rings are printing a closed cell is created. First the supports print, then the bottom of the glass will print creating solid layers, then as you continue you will be printing layers in the shape of rings. So for example if you print a shot glass upright with supports. It means at some point in time during printing when the print is pressed down onto the PDMS the PDMS completely closes the cell. The closed cell I’m referring to does not mean completely enclosed in the final print. If you can’t find an orientation that does this that you are happy with you can add a hole to your part to prevent the cell being closed. So the trick is to orient your part so that any cell like this has a hole between it and the build platform so the cup is never formed. The pressure difference created from the peel and return process is so great that it blows through the side walls of the cup if they get thin enough. This creates a kind of cup in the model at that stage which when pressed into the PDMS acts like a suction cup. To check for a closed cell move the layer view slider up slowly checking for an area that is completely cured on one layer and as you move up the higher layers get a hole in them surrounded completely by that cured area. You want to do this so that you do not have a closed cell of uncured resin. So the solutions involve either reorienting your part or editing your part or both. I imagine it has something to do with the power level of the laser having to be higher to cure through the 0.1 layer thus curing the majority or the layer more, but the dynamics of curing resin are a mystery to me. The 0.1 resolution seems to be stronger and less susceptible to blowouts and 0.025 seems to be the worst. The reason it fails on 0.05 and not 0.1 is not something I know the technical details of however is something I would expect. The problem is you have a closed cell of uncured resin which causes the blowout. ![]()
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