STEM Lab’s 3D Modeling Options Investigation
3D Printing for Beginners Series
- A 3D Printer Overview
- 3D Modeling Options
- Slicer Software Explained
- Fun with Fusion 360
- Tinkercad Tutorial
Welcome to 3D Modeling Options, the second section of our 3D Printing for Beginners series. In this section we will discuss:
- What an STL file is.
- Our go-to websites for downloading free 3D modeling designs.
- A list of popular software options for creating your own 3D models.
STL Files
The most common file format used when designing 3D models is the STL format. While the origin story of the STL acronym seems to be lost, the general consensus appears to be that it either stands for “Standard Triangle Language” or “Standard Tessellation Language” and that it’s native to the stereolithography CAD software created by 3D Systems.
When you create a 3D model, your .stl file will contain the surface geometry of your three-dimensional model. However, it will not contain anything related to your model’s color, texture, or other common CAD attributes it may have.
Your 3D printer will not understand the .stl file containing your 3D model design. You have to use slicer software to translate the .stl file into a set of instructions your printer can understand. We will discuss the g-code programming language used to write these instructions in further detail in our Slicer Software Explained section. Until you have more experience, we recommend you use the slicer software recommended by your printer.
3D Modeling Options
Every 3D object that you print starts with a 3D model design. If you’re new to the world of 3D printing, the 3D modeling step may feel a bit daunting. But don’t panic, our 3D Modeling Options section will guide you through the two options available. You can download an existing 3D model’s .stl file, or you can design your own model using 3D modeling software.
3D Modeling Websites
You can find numerous websites devoted to sharing existing 3D model designs. Whether you’re looking for something functional or something fun & whimsical, chances are someone has it available to download. Once your modeling skills improve, you can upload your own designs for the next 3D printing newbie.
Note: The websites we discuss in the tab below are well-known sites, but you should still proceed with caution. You should only download the .stl file for a 3D model you’re interested in. Never download its g-code file. The contributor’s slicer software generated the g-code for their specific printer setup and filament. It’s also possible to include harmful commands within g-code files which is another reason to be cautious.
3D Modeling Software
Creating a design of your own may seem overwhelming, especially when you’re not sure which software works best for you. That’s where we come in. Check out our software tab below for useful information on a number of the more popular software packages available. Whether you’re looking for something for you or your kids, options are out there.
Note: We are in the process of adding a few modeling software tutorials to our 3D Printing for Beginners series. Contact us if you’d like to be added to our email notification list for these tutorials.
3D Modeling Websites
As much fun as you may find creating your own 3D models to be, there will be plenty of occasions to go for an existing design as well. It may be some time before your modeling skills include very intricate or overly complex 3D models. There are some pretty amazing designs you can download and print while you’re working on these skills. For example, the NASA 3D Resources website and the NIH 3D Print Exchange site below offer incredibly authentic designs. These sites include designs most people can’t easily create without extensive research.
We looked at over a dozen popular websites that share 3D models. We found it hard to pick which sites we liked best, however, the options below are easy to navigate, offer a good selection of free 3D model designs, and had us going back for more. Plus, each of these sites uses the HTTPS protocol.
Note: Remember to read the license restrictions on the 3D models you download. Some model designs will be available for personal use, but not commercial.
We hope the following summary of our favorite sites helps you as you look for existing designs, but please remember that just because a site isn’t listed below, doesn’t mean that it isn’t a good site. Feel free to contact us with any site you think would be a good addition to our list.
Thingiverse
MakerBot’s Thingiverse has been around since late 2008. With over 1,983,090 open-source designs, it’s no wonder they can claim to be the world’s largest 3D printing community. This site is easy to explore, upload to, download from, and even customize the shared models.
While navigating our way around the Thingiverse website we discovered they have an impressive section dedicated to the educational field. Designs shared in this area are searchable by subject and contain content-rich lesson plans.
We also appreciated the fact that we did not have to create an account to download from this site.
MyMiniFactory
Launched in 2013, MyMiniFactory now offers thousands of designs. The site is easy to navigate, and MyMiniFactory has a 100% printable objects guarantee. Every file is checked and printed by someone within the MyMiniFactory community before it’s allowed to be published.
Note: You do not have to join their MMF+ Subscription Service to download from their free STL designs. A paid subscription does seem to offer a lot to the serious designer though.
PinShape
Another community platform, Pinshape has over 70,000 Makers and Designers, where members can share and sell their creations. We found the site easy to navigate and appreciated the option to see free designs only. We like the flow of the site as well as the options available to educators. PinShape does require you to create an account before downloading any designs though, and this restriction may be enough to have you prefer other options.
NASA 3D Resources
The NASA 3D Resources website made our list for the uniqueness of the site. There may not be millions of digital designs to choose from, but what they do have can be exciting yet educational. Plus two of our favorite models available on their site definitely have the wow factor. NASA’s Curiosity Rover 3D printable model comes with 50 printable parts that need assembling, and their Deep Space Station antenna has 6 .stl files for you to download and print. Printing and building NASA’s Curiosity Rover should be on every astronaut enthusiast’s bucket list.
NIH 3D Print Exchange
With just over 10,000 3D printable models available to download at this time, the NIH 3D Print Exchange is another site on our list for its uniqueness. If you or your kids are bioscience enthusiasts and you’re looking for an accurate representation of biological objects, you need to check these guys out.
STLFinder
If you don’t have the time to search multiple websites when you’re looking for a specific design, STLFinder may be worth a try. Known as a search engine for free 3D models, STLFinder will search the major sites for you, displaying the results of the search in an easy-to-view list of designs. Some of the results on our searches were no longer available, and some results were no longer free, but we were still impressed with the ability to search multiple sites in one location.
Thang
A newly discovered 3D modeling website by us, Thang isn’t just another 3D model community. With over 1,500,000 models to choose from, Thang is becoming one of the fastest-growing communities for 3D modeling. Their site offers a powerful search tool that will search for similar models to the ones you upload based on geometric shapes. There is no limit to the number of models you can upload, and they offer model version controls if you’re interested in working with others on a project.
Once you have the .stl file for your 3D model design, you’re ready to transform it with your slicer software to create a set of instructions your 3D printer can understand. After that, you’re ready to print.
But what exactly does the slicer software do? The next section in this series, Slicer Software Explained, will help you better understand what’s going on during this process. Furthermore, it will show you some settings you can change in order to get the print you’re hoping for. For instance, if you adding a skirt around your model will eliminate some imperfections by getting the filament flowing smoothly before the actual model is printed.
Note: Contact us now and we can email you as soon as additional sections in this series are finished.
3D Printing for Beginners Series
- A 3D Printer Overview
- 3D Modeling Options
- Slicer Software Explained
- Fun with Fusion 360
- Toying With Tinkercad
We hope you enjoyed the second section of our 3D Printing for Beginners series.