Obliterax wrote: ↑Fri May 07, 2021 5:43 am
I got it to work the way I wanted it to. It looks like the problem was that the rotations
of the body and the bore weren't the same. Once I set the angle to zero and the axis to [0,0,1] for both of them, they ended up where they were supposed to be.
Even then not use a Part boolean on a feature, but only on whole bodies.
You were totally right about making the core bigger, though. I guess that must be a problem with trying to fit a B-spline to a circle?
Sort of, but it occurs with simpler shapes too. It is - my guess - the limited precision when calculating planes that just touch. It can happen, that they don't really touch, but that they cross more than once. Something that is not possible in pure geometry.
Is there a way to get the original helix into the Bore body? Or can you make a helix in PartDesign mode?
Yes and yes. You can edit the bodies Group property and add the helix, and you can use the helix feature in the current FreeCAD version. Which shows, how important it is to add the FreeCAD infos to topics.
And does the geometry checker work on PartDesign parts, too?
Yes, on any shape. And probably easyer - and more convincing - would have been to try it; it's only four clicks away.