Gear workbench problem with naming faces

[cehjan]

Hi

If I create an Involute gear in the Gear workbench, the side faces get some names like Face91, Face92... As far as I can see, names are first given to the sides of the teeth and then to these side faces. Now when I make a 3D model of a complicated gear based on this gear and want to change it, any change in the number of teeth will change the name of those two sides and will provoke a TNP. If I reduce the number of teeth, the pages will be called e.g. Face73, Face74 and if I increase it, then for example Face121, Face122.

I know how to draw to avoid TNP, but sometimes it's not practical. Since the sides of the teeth are used for almost nothing it might not be a bad idea to always call these two sides Face1 and Face 2, then they would never change when the number of teeth changes.

I know that an algorithm for solving TNP is currently being implemented in FreeCAD. I wrote this just as a reminder that maybe some problems can be solved with simple fixes like this. This way, FreeCAD will be faster and simpler. I hope I didn't write something stupid since I'm not a developer and I don't know the way FreeCAD names pages.

Best regards

[cehjan]

Hmmm. I noticed that the Part Design Involute gear works the same way. Apparently FreeCAD first gives names to the pages that are formed from the sketch and then to these two.

[chrisb]

I know how to draw to avoid TNP, but sometimes it's not practical. Since the sides of the teeth are used for almost nothing it might not be a bad idea to always call these two sides Face1 and Face 2, then they would never change when the number of teeth changes.

That would indeed be good.
I faintly remember that it used to be like that. But sadly there is a non zero probability that I'm mistaken.