Hi,

I'm new to MoI and 3D too, so I tried to do this exercise.

I think the problem is after the extruding operation: for an outside fillet one must boolean/union the two or more faces where the fillet is to come. That means that after selecting the model you need to click again on the body to select the face and then click on the extruded faces, do a boolean union and only after this you can fillet.

The fillet itself is very small (1mm at the most).

I find the filleting in MoI not very intuitive..

Hope this helps.


Frank

Hi Frank - yes after building things in this way as individual separate surfaces that are next to each other you then usually want to join the surfaces together so that they have a shared joined edge between them rather than being totally separate objects.

Although you can use Boolean union to do that, I'd generally recommend to use the Edit > Join command instead for this type of combining (when combining along shared edges). That's because the booleans are more focused on trying to intersect objects and potentially remove material from them, so they will go through some extra calculations to try and determine if the objects being unioned need to be cut up. The Edit > Join command on the other hand is only focused on gluing edges together and does not attempt to do any intersection or cutting step at all.

And yes for doing the regular edge-based filleting that's done on joined edges so you want to get the pieces joined together after you have built surfaces.

When possible it can be nice to keep things as solids more throughout the entire process and carve pieces away using boolean operations rather than building individual surfaces. That can then avoid needing to join things together as a separate step since they stay joined throughout. But it can also be helpful to work at the individual surface level for building more complex models as well, that's why MoI supports either way.

When you work at a surface level you will end up doing some more manual joining steps.

- Michael

Hi Michael,

After some experimenting I ended up joining two joined surfaces and then the fillet was OK.

I tried the solid/boolean thing and that worked OK too.

Thanks,

Frank