![]() Select ‘Polygon’ Select the entire model. (Note: If your model shows up with the object color, and not black with a colored wireframe, skip ahead to scaling the object.)Īs in the Rhino example all of our Normals are inverted. Make sure your geometry is selected and click ‘Import.’ Select the OBJ file we exported from Maya. Click on the Max Logo –> Import –> Import To fix this open the Modify panel, select edit ‘polygon.’ ‘Polygon’ is 3DS Max’s word for ‘FACE’. Inverted Normals appear black, instead of object color. Objects without inverted Normals show as the object color. Max is prepared to show flipped Normals without any extra set up by us. We are now ready to open the file in ZPrint.Īs with Rhino I will again first explain how to solve Normal Issues. Select Stereolithography (.stl) as your file type. Select your model, type ‘export’ into the Command Line. 02 and select ‘OK.’ Make sure the offset did not create any Normals. If the new mesh (White) is inside the object click ‘Flip/All’ to make the offset go outward.Ĭheck the box ‘Delete Input Mesh’ use a thickness of. Since our model from Maya already has thickness however, so in this case we only need to add a nominal thickness to make sure all the surface intersections are closed.įirst, make sure the offset is in the right direction. Now In order to be structurally sound a 3D print needs to be at least 1/8″ thick. Select your model and type ‘offsetMesh’ into the Command Line. We have to make sure the object is water tight.įor this we will use the ‘OffsetMesh’ command.ĭelete the box, we don’t need it anymore. ![]() Great! We have solved our Normal issues and scaled the object to the print size we want. Now scale down your model (type ‘scale’ into the Command Line) until it fits inside the box. We do need to scale the object to a size appropriate for the 3D printer. Since we are dealing with an abstract object we do not need a precise scale. If you are printing to a specific scale you must first take your object by the appropriate scale factor. Orbit around make sure there are no other Normal issues. Your model should now look as it did in Maya. Select the entire object again and type ‘join,’ again as shown above. To fix this Select the entire object and type ‘flip.’ as shown above. This means all our faces are facing the same direction, but they are facing the wrong direction. The fact that everything is green is good. WHOA!! Everything is green!! But, now the model looks like it did in Maya. If your model appears slightly different from the model in Maya, as mine does above, select your model and type in Explode. Note: If your model looks like it did in Maya (doesn’t look like this) skip ahead to scaling the object. Zoom Selected to Center your model into the Viewports. Navigate to your OBJ file and select open. You now have a single object with all the normals facing the correct direction. Select the inverted face and type ‘flip’ into the command line. To fix this first explode the object (type ‘explode’ into the command line) or ungroup (type ‘ungroup’ ) until you are able to select individual faces. All normal faces will be the correct object color.Īn object with an inverted normal will now look like this: Then Select a Bright color other than Yellow (Yellow is Rhino’s selection color – this can cause confusion) and Click ‘OK.’ I like to use green.Ĭhanging Backfaces to green will make all ‘Inverted Normals’ appear green, so you know something is wrong. Open the pulldown menu next to Backface Settings, select ‘Single Color for All Backfaces.’ In the options dialog navigate to Rhino Options –> Appearance –> Advanced Settings –> Shaded First type ‘Options’ into the Command Line. Click Export Selection and save your file. In the dialog box select file type and scroll down to ‘OBJexport.’ The default settings are fine. Go to File –> Export Selection and open the dialog box. Now select the object you want to export. Once you have loaded the OBJ Exporter then click ‘Refresh’ and then ‘Close.’ Only load the Plug-Ins you know you are going to use. Note: Do not check auto-load for all the plug-ins at random. In the plug-in Manager scroll down to OBJExport and check the box that says ‘Loaded.’ Check Auto-Load to have the OBJ Exporter Loaded every time you open Maya. To do this go to Windows –> Settings/Preferences –> Plug-in Manager. I will explain how to use both.īy default Maya does not load the OBJ exporter. stl files so we will use either Rhino or 3DS Max. ![]() The Z Corp 3D Printers recognize Stereolithography (.stl) files. All surface Normals must be facing the same direction. If you were to fill it with water, none would leak out.Ģ. The model must be ‘watertight.’ This means that the object to be printed must be a solid surface with a thickness, and it cannot have any holes in it. There are two important things to remember when preparing a 3D Print.ġ.
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