So now I have an assembly together with a mesh file and a parametric file. CONVERT MESH TO GEOMETRY MESHLAB UPDATEThe Update button is grayed out so I have manually overridden the mass and could also enter the Center of Gravity, etc. In the physical properties tab below I have chosen ABS from the material drop-down but there are no calculable values. When using meshes as parts these values will have to be manually entered as overrides in the part iProperties. Inventor is unable to set a material to a mesh part and it has no calculated mass or center of gravity. A few things about using meshes in Inventor is that they have no physical properties. The mesh part is now constrained to my parametric part. I could have used any combination of constraints though as if I was modelling with a normal part. To assemble the bottom of the chassis I’ll select three mate/flush constraints to position it. You can see an example of the selections in the image below. All standard constraints and motion constraints will work with mesh selections. With no geometric changes necessary, once the mesh is inserted into the assembly, I can use the standard constraint tool to assemble the bottom to the top of the quadcopter. Unlike STEP files and other An圜AD file formats a mesh cannot be maintained in its original file type. When I insert an OBJ or STL file, Inventor will immediately convert to an IPT part file and insert it into the assembly. To continue, I need to add the bottom half of the enclosure. Here I have the part I modeled in my last post inserted into a new assembly. (The OBJ format is newly supported this year as an An圜AD enhancement). Using the Place command you can select mesh files, whether they are STL or OBJ. If you do not plan on modifying any geometry though why not insert the part mesh right into the assembly. The intent was to be able to make changes to the geometry while retaining its general form. In my last entry I converted the top half of a quadcopter body into a parametric model. We can now insert and constrain meshes in an assembly file directly. There are new sketch projection selections for mesh geometry and a new surfacing tool that can convert mesh vertices into an Inventor surface body. However, you may find that the enhancements to Inventor’s assembly environment mean that you don’t have to convert a mesh part into a parametric model at all. We have seen how Inventor 2017’s part modelling environment can be used to reverse engineer mesh files to make parametric models.
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