How to remove certain faces of my object

[snoozy]

Hi guys, I'm very new to freecad and made already some progress in learning.
Now I got lost and Im'm looking for some guidance.

I try to create a hexagon shaped box for cable storage. I'm almost done, just need to remove some of the flat surfaces and some walls to make more space for some bigger cables.

Can I somehow just degrade the surfaces?
I also tried to copy the basic scetch with the hexagons to reuse it, since it has the form I need. This messes it up.

hex.PNG (69.65 KiB) Viewed 921 times

hex.PNG (69.65 KiB) Viewed 921 times

[chrisb]

You can try Part->Defeaturing, but as it is not parametric I would not really recommend it. Instead create a bigger hexagon and subtract it from your object.

There are several topics about such patterns, you may search the forum.
Besides, I don't recommend to mix Part and PartDesign if not necessary.

[snoozy]

Thanks for the fast answer. For me it seems to be necessary to mix part and part desing. I will try different next time.

Defeaturing worked for the parts of the bottom.

And I could use some cubes to remove the walls.

Is it possible to add a sketch to the walls, to make them a mesh pattern? This should be for removing material.
I guess its to late at this state of the project and the way I construct it.

[freecad-heini-1]

You can try Part->Defeaturing, but as it is not parametric

Pleasy give the defeaturing workbench from easyw-fc (Maurice) a chance, because there is a parametric defeaturing tool inside.

[drmacro]

For me it seems to be necessary to mix part and part desing.

Could you expand on this please?

I'm curious why this is the case.

[snoozy]

Well as far as I learned from the tutorials. This is my way of construction:

I create a sketch in part design here, this are two hexagons. Then I can pad them to make them 3D. I used the multitransform feature to create more of them.
And now, I need to remove the fillings. Therefore I need Blocks, which I get from Part.

I guess I should create another sketch in Part design to create remove parts. But I cannot put it on any surface and this messes everything up.
Maybe I just don't know how to do it correctly

[Bance]

Why don't you add a smaller hex inside the big one and do it all at once?

[chrisb]

You have subtractive blocks in PartDesign as well, that saves you the cut operation and keeps the tree cleaner and less nested.
But it may be easier to sketch small hexagons inside of the bigger ones so the inner part isn't extruded at all.

Concerning mixing: All this can be well done in PartDesign, however, the pattern tools are not optimized yet, so for a grater number I indeed recommend to use Draft Array.

I had a look at your file and there is something very strange going on: The body starts with a pocket, which shouldn't be possible after all. So I currently don't understand what you have modeled in the body.

[chrisb]

A serious problem we see rather often when mixing workbenches is the usage of forbidden dependencies. In your case you even have a cyclic dependency, which must be removed.

[Vincent B]

An another way to get your honey comb.