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What type of 3D printing file format do you use when you export your A 3D model represents a physical body using a collection of points in 3D space, connected by various geometric entities such as triangles, lines, curved surfaces, etc. There are 3 main types of modelling methods: 1. Polygonal modelling, 2. Curve modelling and 3. Digital sculpting (see these terms). Also see 3D file.
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What Are .STL and .OBJ File Formats for 3D Printing?
.STL format is one of the most commonly used file formats for 3D printing. It is due to the fact that most CAD software has the feature of exporting models in .STL format and most 3D printers support it. The file generates the surface geometry of the modeled object only.
.OBJ format is considered to be more complex than .STL file for the fact that it is capable of representing texture, color and other CAD attributes of the three-dimensional object. .OBJ is also easily exported from most CAD tools and is supported by 3D printers.
However, according to people’s opinion on forums and 3D printing enthusiast platforms, .STL seems to hold a top spot in the list of preference of file formats for 3D printing. The main reason is that this type of file is simpler to use and most mesh repair tools work better with than .OBJ.
On the other hand, if you are willing to print a multi-color 3D model, you would want to choose .OBJ file format.
How to Export .STL and .OBJ Files in Autodesk Maya
Almost all CAD software has an export feature for .STL files set by default.
For .OBJ files this is not the case. You will see that does not provide default setting to save your model or part of a 3D model in .OBJ. For this, you need a plug-in.
Go to Window> Setting Preferences > Plugin Manager > objExport-bundle
Check the boxes next to the objExport_bundle feature and click Refresh.
For the next step, you need to select the object by clicking on it. Go to File> Export Selection (check box)
A drop-down menu will pop up from which you need to select Objexportand clickExport Selection.Another window will pop up in which you can give a name to your file and save it in the directory you want, on your computer.
Viewing .STL and .OBJ Files
There are great online viewing tools that enable you to check your .STL and.OBJ files without the need to download and install complex software that takes up your hard-drive memory. They can be accessed directly from your browser and put your disposal quick and easy features. Here are some of the best of them.
– this online tool enables you to upload and view 3D files in 55 formats, including STL and OBJ. You simply upload your file, regardless of its size and complexity, and view it directly in your browser, without any additional plugins.
it is another free A 3D (three-dimensional) file is an electronic file representing a three-dimensional object. It is created via 3D modelling, which is the process of developing a mathematical representation of any 3D surface of an object via Computer Aided Design (CAD) software. It is also called a 3D model. A 3D file or model can generally be printed with a 3D printer.
3D- Tool is available in FreeViewer, Basic, Advanced and Premium versions. The tool supports both .STL and .OBJ files and has a multitude of features for viewing and analyzing, providing information about the dimensions, surface area and the volume of 3D models.
Checking and Repairing .STL and .OBJ Files in Netfabb
Netfabb is a great tool for checking your 3D files. Equipped with great measuring and slicing features, Netfabb can check and repair your 3D files, making you sure that the 3D model will be strong enough when printed.
Every 3D model is composed of 3 basic elements:
Vertices are points where 2 or more edges meet;
Edges are lines between 2 points;
Faces are surfaces between edges.
All these elements together create a mesh. For your 3D file to be printable, it has to be manifold. Manifold geometry is what makes your model be printed accurately, without gaps and holes in it.
A good example of manifold geometry is the rubber that makes up a balloon. To make sure that your 3D model is manifold, you have to check it first, before sending it to print. Otherwise, your 3D printer will get confused and will print the model with errors.
To repair your 3D file in Netfabb, follow these simple steps:
Step 1. Open Netfabb
Step 2. Drag the file in the program window
Step 3. Click Repair
Step 4. Click Automatic Repair
Step 5. Click Apply Repair button
Step 6. Press Remove old part. This function will repair your file
Now you have your 3D files repaired in Netfabb, and ready to be sliced, to generate the G-CODE, a language that your 3D printer speaks.
Conclusion
There you have it, a quick overview of the most common file formats in 3D printing. Thanks to this tutorial you now know how to correctly export your 3D models in .STL and .OBJ format, view and identify potential errors in the files and repair them easily in Netfabb.
About the Author
Obj Inkdraw Manual Transmission
This article was written by Gambody, a 3D print designs marketplace where users can buy and sell 3D files of game related models. They have been featured on 3DPrintingIndustry, 3Ders, 3Dprinting and other popular 3D printing platforms. You can check them out on Facebook, Twitter and .