Free Cad Files For 3d Printing – If you’re tired of using existing STL files or paying someone to create them, you might want to learn how to make them yourself.
CAD stands for computer-aided design; This type of software allows you to create 3D models – unlike the 2D images you can make with many programs such as Photoshop.
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As with 2D design software, there are a variety of CAD programs to choose from. Some are suitable for inexperienced beginners, while others are more complex. Some are free and some require a subscription and so on.
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It is an open source program, which means that developers can freely add new features and improve them. Unfortunately, this also means that it can contain some bugs.
The program offers many tools, including a 3D parametric modeling tool that allows you to create real-life objects at any size.
The parameters are easy to modify, so you can load and edit a template if you don’t want to create a model from scratch.
Perfect for beginners of any age, 3D Slash is a great introduction to 3D modeling. Several features have been specially developed for schools, making this software useful for educational purposes.
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Their web version is perfect to try out and you can continue using the free version for as long as you want. However, this version only has eight colors and you will have to wait in a queue to export the file.
Alternatively, premium plans start at just $2 per month and include many features to help you create the designs of your dreams.
A browser-based software, SculptGL is perfect for sculpting and painting. It’s pretty basic, but has all the tools you need to create artistic or decorative objects.
The software starts with a ball of content. All the tools are symmetrical, meaning that any changes made to one side of the sphere are automatically applied to the other side. This makes it easy to create figurines, for example.
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Often described as the best CAD software for beginners, TinkerCAD is another free program that comes with tons of features.
Like Slash 3D, it is based on block building. You can develop models from a set of basic shapes, rotate the object to work on its different parts, and even add extra features like electronic circuits.
If you were into LEGO Bricks as a kid, Leocad could be the perfect CAD software for you.
This program allows you to create any kind of object from bricks in LEGO style and is suitable for simple projects and complex structures with many parts.
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Like FreeCAD, LeOcad is free and open source, meaning anyone can add to it and add new features.
Once you’ve designed your part, you can save the file as an STL and save it to your computer.
Finding a free CAD program isn’t too difficult. Different programs have different features. So, if you’re a complete beginner, you might want to take your time trying a few and see which one works best for you.
Once you’ve found the software you like, create a few mockups to learn its features and familiarize yourself with the tools. Fortunately, most programs for beginners are very intuitive to use.
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Depending on the part you want to make and your design skills, you can build the object from scratch or import a template and edit it.
Some CAD software has an extrusion tool that allows you to convert a 2D image into a 3D object. If you want to use 2D images, it’s important to check the software you like and make sure it has extrusion or a similar option.
It is essential to check the option when saving, because CAD programs can be used for different purposes and not only for creating 3D printing models.
The problem is that slicers cannot support these formats. Importing your file as STL will make the slicing process easier.
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The final step in creating your own 3D printer file is to export the design from CAD to the Slicer software.
There are two ways to do this and you may have to choose one over the other depending on the CAD software you are using.
In most programs, just go to file -> save, enter your file name, and save it as an STL on your computer.
In addition to allowing you to save the file locally, some CAD programs can export an STL file directly into the Slicer software. Whether your chipper can import files from your CAD program depends a lot on the compatibility of the two.
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Open source slicers, such as Cura, work with most CAD programs that offer slice export functions. Other slices like Simplify3D can only work with some CAD programs.
If your chipper cannot import the file directly from CAD, you can save it to your computer and load it manually.
Once uploaded or imported, you can open the slice file and cut it to prepare for 3D printing.
You may have found the right CAD software, but there are a few things to consider before designing your model.
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CAD software is available for a wide variety of purposes. Some programs, such as Zbrush or Blender, are designed with 3D artists in mind, even if they are suitable for beginners.
The problem with these programs is that they offer more autonomy in creating models. You may need to enter things like wall thickness manually. This may be difficult at first.
Fortunately, most programs offer tutorials and guides that teach you the basics of creating and preparing a model for 3D printing. Read and follow the rules to avoid mistakes.
As mentioned above, most CAD programs save files as DWG or DFG by default. These files will not work in most slices.
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In order to make your design ready for 3D printing, a slicer needs to make it into small triangles. The 3D printer can read the location of each triangle and print accordingly.
STL stands for standard triangle or standard tessellation language. This is the language your 3D printer can understand, so it’s important to save the file correctly.
The slicer turns the object into small triangles that are connected together. Your printer extrudes one triangle at a time, even if the process isn’t always visible or intuitive.
However, the reason you don’t see the triangles on the surface of 3D printed objects is because the original files are high resolution. If the STL file has a low resolution, the triangles are more likely to be visible.
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For example, if you are designing a chimney that needs to fit in a hole, you need to make the hole slightly larger than the pipe, but not too big.
When designing the object, calculate how much clearance you need for each part and make sure the separate pieces are aligned with each other so they fit properly.
In general, a tolerance of 0.01mm is enough to fit the parts together, giving your model a smooth appearance.
An important thing to keep in mind with 3D printing is that each model must have a solid base.
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If you are designing a hollow object (like a tube with both ends open, for example), the base of the mold may be too thin to adhere properly to the build plate. If this happens, the model may bend or tear.
To print a hollow part with two open ends, you should use cork. A raft is a solid foundation on which your partner is built. After printing, you can cut the cork and just keep yours.
If the walls are not thick enough, the model may bend. Too thick walls can generate too much internal stress and break the printed pattern.
As a general rule, you should calculate the wall thickness as twice the diameter of the nozzle you are using. So for a 0.4mm nozzle, the ideal wall thickness is 0.8mm.
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The easiest way to get 3D print files is to design your parts in CAD software and save the file as STL.
To do this, you must first import the 2D image into a CAD program and turn it into a 3D object. Save the file as STL and export it to your slicer.
A 3D printer file can be created regardless of skill level. Free programs with educational features are best for complete beginners. If you have designed in CAD before, you can choose a more complex program.
Regardless of the software you use, remember to save your file as STL, or your slicer won’t be able to process it.
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