Bad perimeters with High-poly models

[Le_Don_Macaron]

Hi,

I'm getting strange wobbles in the toolpaths generated for models with lots of polygons. (I need my models to be high-poly because I am using displacement maps to "engrave" details into them in Blender).
The models themselves appear perfectly smooth, but as soon as I "prepare to print", the bumps appear in the sliced result.

Hi Poly model:

Med Poly model:

Low Poly model:

As you can see, the problem gets worse with a higher number of polygons. Any ideas what's happening here?

The problems only seems to exist on parts on the model which are *almost* straight lines, so I wonder if it's perhaps something to do with Simplify trying to interpolate between loads of points which are not fitting within some kind of tolerance?

[Le_Don_Macaron]

Anyone got any ideas?

[DarthRevan]

Can you upload your factory files or link them if they're too large to upload here?

[Le_Don_Macaron]

Yes - will do

[Le_Don_Macaron]

https://www.dropbox.com/s/5i1iigeay9ggi ... ctory?dl=0

[Le_Don_Macaron]

That's the hi poly one with the issues. Do you need to see the lower poly ones too?

[DarthRevan]

I'm not entirely sure what the issue is, but the model does get detected as having self intersecting surfaces. I've seen slicing irregularities stem from model issues before. They're in multiple places but on outer face they seem to be right along where the issues are showing up in the preview.

[Le_Don_Macaron]

In case anyone else has this problem - I eventually solved it by using the Decimate modifier in Blender to reduce the number of faces by approximately half, then re-exporting the STL. No visible change to the model, but Simplify was then able to slice it cleanly.