scottdmills71 wrote: ↑Sun Jul 29, 2018 3:15 pm
freecad ver0.16
Linux Xubuntu 18.0471
I am trying to make a negative fillet between a cone and a flat plane.
To me that's a positive fillet because it adds material to an inside edge (and to me a negative fillet would remove material from an outside edge).
scottdmills71 wrote: ↑Sun Jul 29, 2018 3:15 pm
I am not sure which tool/process to use within freecad.
To add to the previous replies, in FreeCAD we don't Fillet separate objects to fuse them together as though we are laying down a weld bead to join them. Instead the separate objects must be combined into one thing before a Fillet can be applied to where they met. To join separate objects use the Boolean Union tool:

after you create a Fusion of them, then you can apply the Fillets to the Fusion.
meme2704 wrote: ↑Sun Jul 29, 2018 5:34 pm
Furthermore I would recommend to upgrade to FreeCAD 0.17.
Do not listen, V0.16 is very good to start, unless you want to know the pangs of Partdesign
I disagree with the suggestion not to upgrade your FreeCAD version, especially because you can have FreeCAD 0.16, 0.17, and 0.18 all installed together on your computer. Version 0.17 brought big changes to the work flow in the Part Design WB, which you might as well learn if you intend to stick with FreeCAD.
TheMarkster wrote: ↑Sun Jul 29, 2018 5:45 pm
With part design features mixed in with part operations maybe upgrading is not a good idea for this model? It contains with a part design pad.
My suggestion is that usually if you start in Part Design, stay in Part Design. But in this model a lot has been done after the Pads were made, so I'll suggest that you stay out of Part Design.
TheMarkster wrote: ↑Sun Jul 29, 2018 5:45 pm
If you decide to upgrade be sure to save a backup copy of your file before trying to open in 0.17 or later just in case it causes problems.
Edit: Then again I opened it in 0.18, so...
And now there is a backup copy on the forum, and I have one too (although I may not keep it for very long).
chrisb wrote: ↑Sun Jul 29, 2018 6:03 pm
Due to Abdullah's phantastic improvements of Sketcher I tend to recommend the current 0.18 version: Best solver messages ever. Best help on finding degrees of freedom ever. And it seems to be as stable as 0.17! Objections?
No objection from me because I have 0.16, 0.17, and 0.18 all installed.