It’s not unique to FreeCAD I’ve certainly run into topological naming instability sometimes in SolidWorks, but there I have been bitten less often I think that its naming scheme ends up more stable in practice not sure why.Īll this to say: I am really impressed with the solution to the topological naming problem that realthunder came up with. Most of the tutorials I watched when I was first learning FreeCAD led me down the garden path by suggesting workflows that set me up for failure there. I’ve also been bitten by the “topological naming problem” making freecad designs unstable. They say they aren’t done yet, but… when is software ever done? Posted in 3d Printer hacks Tagged 3D modelling, cad, freecad Post navigationįreeCAD developers are sending really mixed messages by both saying that 0.19 as a beta is more stable than 0.18 but still leaving 0.18 as the “stable” version and continuing to label 0.19 as a beta - and then complaining when people use 0.18. We’ve also been enjoying Solvespace lately. You code the constraints you want explicitly. OpenSCAD, of course, does nothing but parametric modeling in a very direct way. As an example, you can see a model of a NEMA stepper motor that can change from a NEMA 17 to another size by just selecting different parameters from a configuration table. There’s an upcoming feature that will allow you to group parameters into sets. shows how to use spreadsheets to manage complex parameters in big projects, which is pretty handy. You provide various constraints and parameters and FreeCAD works out the shape for you, keeping all the constraints and formulae satisfied. For example, you could define one line as being twice as big as another line. The nice thing about parameters is they don’t have to be just constants. has a nice video about how to use parameters in FreeCAD. The other advantage is you can use one model for many similar but different designs. One is that you can use parameters to change parts of your design and other parts will alter to take account of your changes. But modern programs use parametric models to provide several benefits. Simple drafting programs just let you draw like you’d use a pencil.
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