Laser cut acrylic cases are super popular because they look cool, they’re easy to customize, and cheap to make. This tutorial shows how customize our simple Sick_of_Beige Sick of Beige case design to fit your own project. If you start with our standard PCB templates you can get your project into a case with minimal hassle.
Not everyone has a laser cutter, but there’s cheap online services and your local hackerspace might have one. We’ll show you what we do to order laser cut acrylic from Seeed Studio. Continue reading below.
Before you start
You’ll need to have Google SketchUp installed. See our introduction to SketchUp.
Download and install the SVG export plugin
We’ll use Seeed Studio’s laser cutting service, they take SVG formatted files. Grab the SVG plugin for SketchUp to save in this format. Put it in the SketchUp plugins directory.
Download the case template
Download the Sick of Beige simple case template SketchUp project that fits the standard size PCB you used.
Didn’t use a standard PCB template for your project? It’s gonna be a little more work, but you can still follow along.
Position the PCB footprint at Eagle coordinate center
Open the PCB file in Eagle, and the case template in SketchUp .
The origin marker of the standard size PCB footprint in Eagle should be positioned at the Eagle coordinate center. Origin markers are something every Eagle footprint has, it is identifiable as a white + marker.
We positioned our SketchUp Template so the coordinate centers in Eagle and SketchUp match. Any location on the board relative to the Eagle coordinate center is should match the template in SkectchUp. The intersection of Red, Green, and Blue guidelines shows the corresponding SketchUp center point.
Adding hole shapes for extruding parts
Find the part’s origin point location relative to the coordinate center
Next we find the origins of parts that need cuts in the acrylic. Keep in mind that the origin coordinates in Eagle are relative to Eagle’s coordinate center.
First change the grid in Eagle to millimeters, found in the ‘View/Grid’ menu.
Right click on the component and select ‘properties’:
Using guide lines in SketchUp
Once you have the location of the component draw guide lines in SketchUp.
Now we’ll precisely position the guideline to match the X-coordinate in Eagle using the keyboard input method.
Once you’re done with the X-axis guideline it’s time to draw the Y-axis guideline.
Draw the hole shape for the part
Once you have the part’s origin location on your template, simply draw the outline of the hole you want to cut out.
Draw additional guidelines as needed, and refer to the component’s datasheet for precise dimensions. Be sure to leave 0.5-1mm of clearance for manufacturing defects.
Repeat for all extruding parts
Repeat the above for all the holes you’d like to cut out on your case. We use the ‘Tape Measure tool’ (guidelines) often. It simplifies the sketching, and fully control the location and dimension of the line.
The Tape Measure tool is really easy to use, and after a couple of minutes you’ll be a pro. Here is a manual for the ‘Tape Measure tool if you need some more help.
Export the shape to the SVG file
Now that our case design is done, we’ll export the files for the laser cutting service.
Once everything is setup click ‘Ok’. The plugin will let you know the file has been exported.
Send for Laser Cutting at Seeed
There’s several online laser cutting services. Some have an online interface for ordering, others need time to prepare a quote.
We send our designs to Seeed Studio’s cheap Laser cutting service. It starts at $7 total for 5 copies of a design. Seeed’s low-cost international shipping saves us $50 or more over an order with our previous favorite supplier.
You can find further instructions at Seeed’s laser cutting service page, but this is roughly what’s involved:
Select the quantity, material, and the dimension options that suit your project.
For job difficulty, you need to estimate the overall length of the laser cutting lines. These include the template lines, as well as the hole lines. You can get specific parameters from SketchUp:
Under ‘Length’ is the over all laser cutting length.
Once you buy the cuts you will receive a order number. Compress your SVG file into an archive called L.rar (e.g. L123456.rar) and email it to Seeed.
Tip: If you’re on a budget or making your first prototype, just send the top custom panel and use one of the extras for the bottom too.
Feel free to ask for help
Stuck on something? Ask us in the forum.
Share your designs
Case templates are open source and licensed under Creative Commons 0. They are free to use in any way you like, including commercial projects.
If you make something new please share your designs with us forum in the forum.