Daniel Schöni

Workaround: Calculate the sphere's posittion by using Trigonometry. For 45° and symmetries sqrt(2) can be used ... Use the U-Parameter of the sphere to cut it. In many cases it...

One strange thing: Using an uncutted sphere with rotation 0° causes an error. Using it with the opposite 180° works. The same with 45° and 225° ... Altough using an...

So, as I think, I gave enough information, to reproduce the problem. The issue is obvious. Closing the issue does not solve it.

I've recreated the file. [Sphere-Problem.FCStd.zip](https://github.com/FreeCAD/FreeCAD/files/10079605/Sphere-Problem.FCStd.zip) (Remove the dummy zip extension) This demonstrates the bug. (Does not mean, that I do it still the same way ...) In the meantime I've...

I still have massive problems with roundings, like the following: [Test.zip](https://github.com/FreeCAD/FreeCAD/files/10889300/Test.zip) It seems to be impossible, to create this object in parts workbench.  I found no way, to merge...

@FlachyJoe No, not by the scaled cylinder, but by the fillets! Anyway, thank you for the attempt to help! I've tried to recreate the whole parts on different ways and...

@FlachyJoe Really interresting! it's my impression, designs created by parts workbench will create always invalid solids with time ... But unfortunately I have always problems, creating sketches. Often there is...

Short summery: As some radii are involved in calculations while cutting, merging, fillets or other operations, the process fails often and leads to errors in part workbench. The problem still...

There seems to be no intention to solve this problem, so I'm looking to try Fusion 360.

Working in part workbench is a more natural way, to get results. If you want a hole in a bowl, you drill it with a cylindrical tool. You will not...