Question - Export Planar Mesh to 2D path


#1

Hi,

I have a low poly model consisting of a number of planar faces. I wish to export the faces as a 2D path such as a .DXF or .AI. When I do so, however, the path exported is from a left/front/top projection rather than along the plane of the face itself.

I eventually want to use the path as a cutter guide to create a real life model from wood.

How do I export each of the shapes to a cutter path along the correct plane?

Thanks is advance.


#2

Use ExtractSrf (option copy) to extract the surface, then UnrollSrf. You will find the surface on the world-X-Y plane, near the origin. Select the surface, then use DupBorder to create an outline that can be exported as a 2D toolpath.

Max.


#3

Thanks Max.

When I try to use ExtractSrf, I am unable to select the surface. Same goes for UnrollSrf.

When I select it normally, the lower right hand indicator reads ‘1 mesh added to selection’.

Does the fact that it’s a mesh rather than a surface make a difference? Or are these 2 terms for the same thing?


(Pascal Golay) #4

Hi Thomas - you might need to jump through a hoop or so - Select your meshes, DupBorder, then hide the meshes. Select the border curves and run PlanarSrf - if the curves are in fact planar, you’ll get surfaces that you can then UnrollSrf.If those have thickness, you may want to only ‘process’ one face on each, not all 6 sides.

-Pascal


#5

No they are not the same thing. Rhino surfaces are NURBS surfaces, it will recognise meshes but you have to use different commands to manipulate those. I don’t know much about meshes, so I would not know how to create tool paths from those. Follow Pascal’s advise.

Max.


#6

You should select all meshes to work with and use the command MeshToNurb first, then go on with @maxz´ Steps.


(Pascal Golay) #7

Yeah, MeshToNurbs is perfect here, I don’t know what I was thinking…

-Pascal