unable to make a simple sweep - channel along curve

tom_10

Hi, trying to create a C-shaped channel along a curve , and getting "could not create valid swept body"
The preview looks good actually, could not find the problem
any help will be appreciated . link below



https://cad.onshape.com/documents/577ab6481779d6c08f370135/w/225ec47b2a08591f7833f3b5/e/2dd93bf657300691adc022b4?renderMode=0&uiState=6656d5f87391106c9524d4b3

David_YL_Nguyen

Hey @tom_10,

The problem will most likely be the sweep path, resulting in some self-intersecting geometry. I think the curve might just be too tight for the sweep profile.
Check my screenshots for where I think the issue lies. 

Hope this helps. Cheers

tom_10

hi thanks for the reply! it seems like there should be a way to perform this action...?
I winder if sub-dividing the path into smaller segments will eventually make the overlapping segments small enough that the algorithm accepts it? why won't the algorithm allow overlapping parts to just be joined into a single volume?
I will try a different approach, doing more of the work in Inkscape instead of Onshape (maybe giving the path a thickness and extruding it , then using a shell command to create a channel)

_anton

Though it's not a fully robust solution (it'll fail for much higher values), I had some better luck with a surface extrude + thicken: https://cad.onshape.com/documents/a63b9d3b0505327c7b4f6868/w/94a36c066e034938654a6782/e/9bfce2af114844bf093e2be3