Extrude, Keep Edges

famadorian

If I extrude something like this, the edges disappear.

What I mean is that I've specifically made cuts here that I want the extrude to keep. 

If that's not possible, then I'm not sure which workflow I should be using, cause this is a cabinet and when I attach the door to this cabinet in the assembly, I don't have the edge that I want to attach it to. 

https://cad.onshape.com/documents/a3610a44fdd7c3eb8128d329/v/ef5ec9cd30c496a8b6f3635c/e/361a1676f80cbe423bcba51c

Jake_Rosenfeld

@famadorian

You will have to do this as two extrude features.  Sketch regions that are touching in an extrude feature will automatically merge with each other, no matter what boolean option is set.  Do the extrusion of the outer box first, and then do a second extrusion of the shelf, making sure to set "New"

NeilCooke

If you’re using “add” then any intersections will merge with the rest of the model. If you use “new” it will keep the edge. I think that is what you are asking?

famadorian

Ok, I tried using "New", but it complains that "No merge scope selected", even though I checked "Merge with all"

NeilCooke

You image says “add”?

famadorian

Right, but I was using "new"; sorry, was confused. 

However, when I use "new", the edges disappear. 

famadorian

Here's the result of using "new"; the edges I want disappears from the final extruded result

famadorian

I want to somehow get this edge, which was in the sketch

I need this edge to put the door on. 

I can ofcourse make a whole new plane and add some geometry there, but if there is a way to get this edge, it would save me that step. 

Jake_Rosenfeld

@famadorian

You will have to do this as two extrude features.  Sketch regions that are touching in an extrude feature will automatically merge with each other, no matter what boolean option is set.  Do the extrusion of the outer box first, and then do a second extrusion of the shelf, making sure to set "New"

Jake_Rosenfeld

That or after the extrude, split the front face with the planar faces created by the extrude.
https://cad.onshape.com/help/Content/splitpart.htm

famadorian

Thanks;)

owen_sparks

Jake_Rosenfeld said:

That or after the extrude, split the front face with the planar faces created by the extrude.
https://cad.onshape.com/help/Content/splitpart.htm

Just as another alternative, there is a custom extrude feature that does that.  Now who wrote it?  I think it was a Jake Someoneorother, hang on a minute I'm sure it will come back to me

O.S.

Jake_Rosenfeld

@owen_sparks

  

( https://cad.onshape.com/documents/cf2ebd36a36695408b9650a9/w/8e89a7bc10431e16fe2fceb7/e/b34a987c9a30ef7498b53f66 )

owen_sparks

That's the one, clever chap that Mr. J.  Someoneorother