19 Replies Latest reply on Feb 12, 2019 1:38 PM by Nuno Sousa

    Scan to 3d

    Nuno Sousa

      Hi everyone,

       

      I'm new with surfacing, and I'm training to get the surface from a mesh.

       

      I already try to use the Scan to 3D, but is not working, I a need to clean/adjust the final surface.

       

      Can anyone give me some guidelines/advice.

       

      Thanks in advance.

       

        • Re: Scan to 3d
          Paul Salvador

          Hello Nuno,.. what you can do is create a curve networks to form nurb 4 sided patches/boundaries,.. using planes or directly on the mesh.. keep tweaking/interpolating til you get it as close as possible. (image attached)

          curve-patch-network6.png

            • Re: Scan to 3d
              Jonathan Moore

              I like this technique! Did you create points on the mesh directly, then create 3D Curves from the points?

                • Re: Scan to 3d
                  Paul Salvador

                  Hello Jonathan,.. "if" I had the 3D mesh yes... but,  the above is just a 2D image and a example using curves),.. I freehand a 3dSketch and create boundaries, sheets or quilts...onto the mesh bodies visual boundaries/transitions... and, I don't use "points".. just snapping the 3DSketch knots to the edges/vertex/mids.. and I usually break those relations and refine the placement of the curve along the mesh... btw, always keep the curve network simple and tweak /refine later.

              • Re: Scan to 3d
                Steven McCallion

                First question Nuno, have you actually managed to get Scanto3d to recognise the mesh and bring up the tools you need?

                Did you open the mesh as a Scanto3d mesh like below?

                • Re: Scan to 3d
                  Kevin Quigley

                  Paul's suggestion is what we do as well. Years ago I bought a NextEngine scanner when they were first launched. I used it with software called VX to reverse engineer ceramic products to prove to my customer that they really couldn't fit a plastic injection moulded cover into groovs on this object as the groove locations varied with each part. VX had a specialist reverse engineering mode, and was WAY faster than SolidWorks for mesh handling then.Anyway, to cut a long story shorter I thought it would be a push button affair - scan>mesh>compare. No. It was sand>spend ages repairing holes>spend ages trying to align different objects.

                  Since then we rarely use the NextEngine, and in fact it died last year. We decided not to replace it.

                  But with all the pain we had I realised it taught us a big lesson when it comes to scanning and reverse engineering. Unless you are prepared to get something like Geomagic Studio, just stick to Rhino (as their 3D curve and mesh handling tools are great), or do exactly like Paul suggests.

                  The best you can hope for is an approximation of the point cloud. I don't use SolidWorks automated curve toolsin 2019 as they are a bit clunky. Better to use a plane, section at the plane and use my eyes to match the profile. And keep the number of points on each curve in the same direction the same - will make surfacing a far less painful experience.

                  Good luck!

                  • Re: Scan to 3d
                    Nuno Sousa

                    So, I used the loft to get the surface and the with surface tools get the rest of the shape.

                     

                    Now I'm into a problem, I can't add that to a solid ( mold ). Ideas?

                     

                    Thanks in advance to all of you.