Multiple nested lofts

karl_davies

Drawing: https://cad.onshape.com/documents/c84be3eaa57835779958b51b/w/5ba0502032e859af3bbc6e36/e/7a26f09ac3996fbb3c7d839b

Nested lofts always seem to defeat me, is there any way to achieve the nesting below? So each ring should loft up to the matching, slightly smaller ring above it. I can sorta manage it by making each "wall" separately, then thickening by 1mm, but this means adding 19 lofts (inner one can render fine using the faces). Additionally, taking this approach, once the thicken is added there is a gap at the corners.

Many thanks!

karl_davies

I got it using multiple sketches. This the most efficient way?

https://cad.onshape.com/documents/c84be3eaa57835779958b51b/w/5ba0502032e859af3bbc6e36/e/22dc9ec24776464344d2bd74

bruce_williams

You can choose two profiles with 6 selections each.   It is then similar to what you did with separate sketches. Then repeat for each of the 4 sizes. 
 See this picture.

karl_davies

Mate you are a legend! Thank you 

bruce_williams

You are very welcome @karl_davies

Another issue maybe - you will have angles on top & bottom edges due to thicken working normal to face.  If that matters you can make the part longer, split with plane, and delete excess OR move/replace faces to/with a plane.

romeograham

Another approach could be to use Solid Lofts (easy to select each closed profile). Then, with a single Shell command, you can remove the top and bottom faces, and end up with your 1mm walls:

https://cad.onshape.com/documents/e91bafbcc809fc7f21cd6117/w/4766ed7ff65755ee9a9ff291/e/083f39a57b7b75eda3817ce2





Good luck!