On a fresh reinstall of stable from today, on Win-64 (version 0.21.2 revision 33771 (Git), released 2023-11-14 02:33:39): The following behaviour of BlendCurve objects must be a bug: When editing the BlendCurve, recomputes of the curve during and after editing do not take coordinate transformations ...

A small fillet on the inner corner, then a 10mm fillet works. Fillet is particularly bad when >2 edges meet. Hmm, I cannot confirm that. In the simplified file that I posted in my top message, neither a 1mm nor 2mm fillet on the inner edge, combined with a 10mm fillet of the now three edges gives m...

Well known issue that fillets are fussy about the edge geometry to which they are applied. It is limited fillet capabilities of the OCC solid modelling kernel used by FreeCAD. :( Thanks for the info. I take it, there is no way around that, except for building the model in a completely different way...

Some unexpected behaviour when creating a fillet. Is that a bug? Can somebody reproduce it? Any idea how to work around it? Untitled.png Cheers Peter OS: Windows 7 SP 1 (6.1) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.19.23578 (Git) Build type: Release Branch: master Hash: 50c3c...

kisolre wrote: ↑Sun Jan 23, 2022 10:35 pm

perot wrote: ↑Sun Jan 23, 2022 8:27 pm I'd still like to know why.

And for the third time I will repeat that: OCC does not properly refine shapes every time.

You're obviously not a particularly curious person. I am. For me, this does not answer my question.

Cheers Peter

you probably do not need to remodel as such, your model starts working when the angle is 94 and above. You were faster than me. The source of that number is clear: At 93.82° the seam is exactly at the location where the cut happens. Beyond that it is cut away, along with the problem. I indeed now r...

chrisb wrote: ↑Sun Jan 23, 2022 6:17 pm Errors shown in CheckGeometry are most often, but not always an indicator that something bad will happen in the future.

That was my experience too, so I aquired the habit to, from time to time, CheckGeometry all the objects I created, and if possible, fix the ones with problems.

Cheers Peter

I have increased the cube to avoid all so called coplanar problems. To no avail. Then I swapped the sequence of subtractions and now it works without geometry errors. I noticed this too, by now. Unfortunatly, swapping the subtractions is not an option, as I need the object with the drill hole, but ...

Select this edge and apply a very small chamfer. I used 0.011 mm and it worked to resolve the issue. Snip macro screenshot-297967.png Indeed! How can complicating the surface make problems disappear. Scratching head ... So later today I'll try that solution with my full model. There it'll require a...

What's wrong with this exceeding simple geometry? When I apply Part:CheckGeometry on this object, it reports problems associated with the contour of the drill hole's opening. Somehow this is related to the cut that removes the back part of the base cylinder. If I dissolve that cut, and check the cyc...