How to create a non planar path to be used for a sweep

[Greyble]

I'd like to be able to sweep or loft a profile over a path that is non planar. I've attached a mock up hopefully it'll help explain the issue.

In the PartDesign WB I created a bowl as a body. Using this I wish to create a 'cradle' that spirals out from the base (in XY plane) and at the same time rises to touch the outside of the bowl - i.e the actual path looks like part of a spiral when projected onto the XY plane and part of an elipse when projected onto say the XZ plane.

[TheMarkster]

Perhaps a helix would be better than a spiral?

[chrisb]

Have a look at the addon macro "3D parametric curve".

[papyblaise]

use Part (I don't know how to do it in PartDesign)
Make a Helix, create a wide strip with Sweep, make a Common between a bowl copy and the spiral strip
draw the profile of the support and make a Sweep between this profile and the edge of the Common as a path

[Greyble]

First - thanks for all the prompt replies.

I was unaware of how useful and general purpose the online macro's could be - the '3d parametric curve' will be useful elsewhere.
Thanks to papyblaise - I was looking for a technique to solve this sort of interaction issue. This approach will also be very useful.

[drmacro]

Or with just profiles and the Curves workbench:

Spiral3D.png (87.85 KiB) Viewed 599 times

[mario52]

hi

other idea Macro_FCSpring_On_Surface

Bowl01.png (36.62 KiB) Viewed 597 times

Bowl00.FCStd

(112.77 KiB) Downloaded 14 times

mario