I prepared my model for print, took me so many hours and I realize now that I have micro over hangs (ranging from 1 to max 5 layers) where they are not attached to anything and I’m wondering if they will fail my print or if I can afford it. Preform won’t let me put supports to hold them because those areas are too narrow. Is it too dangerous to test printing it?
No, I routinely print models successfully with these little glitches. I stopped worrying about them long ago. You want to worry about large unsupported areas, but small specks get wiped away as Fantasy2 says, or they embed at the first layer that reattaches to the model and come off in the peel. Particles smaller than the smallest feature size of your print don’t seem to impact print results much… which sort of makes sense.
PreForm does sometimes miss smaller ‘islands’ like those that you’re seeing. Often, it’s best to avoid these but they typically don’t cause issue and usually either stick to the part or end up printing successfully. Some users opt to enter support edit mode and use the layer slider to identify any unsupported minima and place support points on them.
Yeah I usually hunt down does problems for a good 2 to 3 hours, even 4 hours sometimes and place supports to fix them, but sometimes I can’t place supports. Good to know those will not fail my print thanks!