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Newbie Corner: Doubts about how to subtract an object with another subtracted object (by Gabriel)
Hello everybody!

I started to learn the solvespace and I'm enjoying a lot to draw and learning some tips and tricks.However, I found a situation yesterday that I didn't know how to handle in the best way.

There is an example in the attachment that I made on Inkscape just to demonstrate the main idea. The idea is to make an angulated hole in a sliced cylinder (I think the attachment could explain this better).

I made the main piece easily, just extruding a circle and subtract from another extrusion (a triangle). But the hole is the biggest challenge. I tried to create a new group with a circle extruded and I made a new triangle extrusion to create a "chamfer" in this cylinder. After this, the idea is to subtract from the first group, but I think the solvespace works a little differently.

I assumed that is possible to create object A (main cylinder with chamfer) and object B (hole cylinder also with chamfer) and subtract B from A. I tried a lot of ideas, but subtraction is always applied for all objects due to the sequence of groups.

Sorry if I explained too cofusing, sometimes is hard to explain 3d objects without drawing them. But, is there an alternative way to draw this?

Thanks in advance!
Gabriel
Mon Dec 26 2022, 09:57:29, download attachment holder.png
(no subject) (by Gabriel)
I think I managed to solve this problem. I tried to think in a reversed order. The idea is to extrude the "core" and chamfer and extrude an external ring a little higher than the "core"; after this, I used another triangle to chamfer this one too. Without saying that both pieces are a union, after exporting, the stl file considers everything as the same object. In my case, there is no problem with that.

I don't know if this is the best way to solve it, but in any case, I'm curious to know if there is an alternative way.

There is an attachment of the final object.
Mon Dec 26 2022, 15:11:35, download attachment holder_svls.png
(no subject) (by Andrew)
What you can do is create the shape you wish to remove in a separate file,, and link/assemble it with your first object, and check difference in the link assemble group. You can also create a master base shape in a file, which for your object would be a circle, in its own file, and link/assemble it as the first group n both the base object and the cutter object.

With solvespace, and more you meed to use separate files to achieve more complex objects.
Mon Dec 26 2022, 15:36:53
(no subject) (by Gabriel)
Cool!

I hadn't thought about this alternative. Also, I'll test to see what happens.

Thank you, Andrew!


P.S. FreeCad is a good tool and has its pros and cons, but I'm enjoying it a lot using Solvespace.
Mon Dec 26 2022, 17:07:35, download attachment solvespace_rocks.jpg
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