You are going to get a burr on any edge that is flat for sure… just look at some of the sample prints straight from Formlabs especially the new Nylon Tough sample. It is way worse than what you are seeing here.
For Nylon 12 we are currently dealing with this burr on all edges no matter the orientation when running the Default settings versus the edges looking perfect on the PreForm Legacy settings for Nylon 12. So, this can be minimized in custom settings but we have had not been able to do that yet with Formlabs support.
Legacy seems to have done a “worse job” at keeping a true edge…so in turn you get a more “sanded and rounded” corner. However, this looks a lot better to us, in our opinion, than having Default settings offer a “more improved corner accuracy” as they state it does…which in our case pushes the corner out the other direction and looks exactly like what you are showing here.
I have a thread here with plenty of what you are seeing in Nylon 12. I don’t think your Nitrogen will make a difference in this.
A sample part delivered straight from Formlabs
So, that part being offered as a “sample” of what Formlabs themselves can do… not sure you are going to eliminate that totally.
However I am certain if I ran this same sample part in Nylon 12 “Legacy” settings… it won’t have that burr edge and at least it would look a lot more pleasing to the eye…as a finished/sanded looking part.
As they “refine” these edges, I have asked Formlabs to maybe provide a simple “Sanded Edge” option in settings to get more of that look like Legacy Settings provides… but right now they have me tinkering with “upskin and down skin” trying to achieve this. Also, adding a “chamfered or faceted” edge on all our designs is one thing…but we get a few outside designs that it is hard to go in and do all that now and still does not provide as nice of an edge as just running Legacy settings with Nylon 12.
Good luck, Let us know what Support tells you offline…would love to hear it!
FYI… I was running Nylon 12 GF for nearly two years but the cost of material and 70% refresh needed to successfully do so was WAY to over priced for running production parts… so we are giving Nylon 12 a try. I know folks running Nylon CF but they do it primarily in a prototyping environment… as the cost per part of that is even much worse. Hopefully one day a milk jug of powder won’t cost $300!