I wanted to modify (adapt it for smaller size robots) the Inmoov hand published on thingyverse
I've spent hours trying to find a way to convert STL files into something that CAD system such as Inventor and FreeCad can import.
The problem is that STL is a mesh file and CAD systems work with "bodies" and convex objects and keep data in a way that is easy to define transition between 2D sketches and 3D convex objects and ways of mutating bodies etc.
Finally I found a way. The software is called Instep
http://www.solveering.com/products/prod ... 2step.html
Step1 : import all STL files into sketchup and create a single STL file with all the objects (move each one around when importing so that they don't overlap)
Step2 : import the new file into InStep
It will automatically recognize every independent object and treat it as a solid. in this case 61 solids were found.
Step3 : change the settings in InStep to export all objects
Step4 : export as STEP file and read it into your favorite CAD.
As you can see, there are 61 bodies detected.