Modifier Wall Count - Am I doing this wrong?

[ssashton 2]

I want to have 2 walls in most of the model, except where the geometry modifier is I want only 1 wall.

 

However, the behaviour I see is the number of walls listed in the modifier is 'added extra'. So if I globally set 2 walls and 1 wall in the modifier, I get 3 walls where the modifier overlaps.

 

Am I doing this wrong?

 

 

I get 1 wall extra, but I wanted ONLY 1 wall.

[GregValiant 1,411]

It's so simple and so complicated.  The block has properties and the model has properties.  An "Infill Mesh" will interact with a model and change certain things, and as a "Cutting Mesh" the same block will interact with the real model in a different way.

Here is a little Cutting Mesh in the bigger model.  The cutter is set to single wall,  If you look closely you will see that the small block does indeed have a single wall but the portion of the real model that it has cut still has it's 3 walls - they go around the little block.  A problem is that the little block will leave scars on the exterior of the model as it is "cutting" the model and so what it is really doing is leaving a pocket in the model.  So that pocket has 4 walls - 3 of the regular model and one wall from the cutting mesh.

It's the scar on the exterior that I don't like.

 

 

I'm a firm believer that the slicer should be excellent at slicing the model I give it.  If I want the model to be different, I give it a different model.  Cura is an excellent slicer, but it will never replace a CAD program.  My advice therefore is to alter your model so that area only has a single wall, or you will need to live with some of vagaries of trying to modify a model in a slicing app.  It can be done...but it's complicated.