Sketches on curved surfaces
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Sketches on curved surfaces
Using FreeCAD 0.19, I understand that starting a sketch on a non-planar face doesn't work.
In this model, I've basically tacked on primitives to get the job done. But I'm wondering if there's more of a 'sketch' way to do it.
With the 'arms' I realize I could make a square, on top, and use the "hole in a cylinder method" (https://forum.freecadweb.org/viewtopic. ... t=0#p30704)
However, I am not sure how to make the 'bumps'. I haven't figured out a way to pad/extrude a sketch into a sphere.
In this model, I've basically tacked on primitives to get the job done. But I'm wondering if there's more of a 'sketch' way to do it.
With the 'arms' I realize I could make a square, on top, and use the "hole in a cylinder method" (https://forum.freecadweb.org/viewtopic. ... t=0#p30704)
However, I am not sure how to make the 'bumps'. I haven't figured out a way to pad/extrude a sketch into a sphere.
Re: Sketches on curved surfaces
you can revolve?
Re: Sketches on curved surfaces
Oh, that's a good idea! I'll try it later today!
Re: Sketches on curved surfaces
Not sure I follow, but I am also still figuring things out. By "std planes" do you mean a single sketch, making edits to the sketch?
I'm confused about how to do with with varying heights necessary. Is there a tutorial about this I can read about?
Edit: Also, I learned by doing this and watching this. Are you saying this tutorial is doing things 'very bad'?
https://wiki.freecadweb.org/Basic_Part_Design_Tutorial
Re: Sketches on curved surfaces
yes the tutorial is outdated:
https://wiki.freecadweb.org/Topological ... problem
scroll down to making stable models: https://wiki.freecadweb.org/Feature_editing
https://wiki.freecadweb.org/Basic_A ... Tutorial
https://wiki.freecadweb.org/Topological ... problem
scroll down to making stable models: https://wiki.freecadweb.org/Feature_editing
https://wiki.freecadweb.org/Basic_A ... Tutorial
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
Re: Sketches on curved surfaces
Thanks for that. I read through the problem, and ways to avoid it. Since my design is simple, and not very far into it, I will adjust the way I am doing this and use datum planes.drmacro wrote: ↑Wed May 12, 2021 9:22 pm yes the tutorial is outdated:
https://wiki.freecadweb.org/Topological ... problem
scroll down to making stable models: https://wiki.freecadweb.org/Feature_editing
https://wiki.freecadweb.org/Basic_A ... Tutorial
Re: Sketches on curved surfaces
datum planes not required, typically, just sketch attachment offsets.
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
Re: Sketches on curved surfaces
You can do it like this:-
- Attachments
-
- Example.FCStd
- (84.79 KiB) Downloaded 41 times