M!N!MAL Framework Mainboard Case

Design

The M!N!MAL case series was crafted through experience with all Raspberry Pi generations, from Zero to Pi 5, so we thought it was time to scale up. Now, we’re introducing the M!N!MAL case for the Framework mainboard.

The goal of a minimal case is to reduce material, print time, and resources to the bare minimum, while still offering a practical, protective housing. Compared to the original printable Framework case, this design is 35% smaller and cuts both print time and material usage by more than half, resulting in an elegant, minimalist case that sits neatly on any desktop. Plus, the stands that hold the Framework PC upright double as a mobile phone holder.

Construction

This design relies on two key principles shared by all M!N!MAL cases:

1. Optimized Wall Thicknesses and Features: Wall thickness, radii, fillets, and corners are precisely designed for the intended nozzle size, perimeter count, and layer specifications. This efficient structure allows for faster printing.
2. Mesh Structure for Large Surfaces: Rather than covering large surfaces, this design uses a mesh pattern (gyroid or cubic) to provide protection, airflow, and stability. This approach not only reduces print time and material use but also avoids surface issues like seam start/stop points common with traditional hole patterns.

We made two versions of the case, one for the use without the optional soundcard and one for the use with soundcard which also has different stands to provide additional ground clearance for the soundcard's case extension. Concerning WiFi antennas we suggest the use of the flat, ribbon like antennas provided by framework and did therefore eliminate any antenna mount adding volume to the case.

Openings towards the bottom are open (also for ventilation) and the ones towards the top are closed with just one layer and can easily be cut open in case the interfacing is needed.

Slicing & Printing

This case design includes three main parts: the case frame, the stands, and optional plugs for side openings if desired.

• Stands and Plugs: Print with standard settings, preferably using 2 perimeters.
• Frame: The frame consists of three components: the frame itself, the mesh layer, and the embedded Framework logo (which is a separate part so you can print in a different color or use the same settings as the mesh for it to disappear). Recommended settings for the frame and logo are a layer height of 0.16mm, 2 perimeters, 5 top/bottom layers (or 0 top/bottom layers for transparent prints with 100% aligned rectilinear infill), and the infill oriented at 90° (best for hinge stability). Use aligned seams for a clean finish. Supports are needed for the side openings as these are too wide for bridging. Place seam blockers on the vertical edges where the hinges start for a neat appearance.
• Mesh Parts: Use 30% infill with no perimeters or top/bottom layers. Gyroid or cubic infill is ideal for airflow and stability. A brim is typically unnecessary and can be challenging to remove, especially near hinge areas.

These settings are preset in the provided 3MF file, and sliced GCODE files are optimized for Prusa XLs, with versions available for cases with and without soundcards.

Assembly

Assembly is minimal. To prepare the hinges, place the cooled, printed case back on the print bed, reheat it for a few minutes, then fold up the bottom 90° toward the side and lid. Next, fold the bottom and side together 90° toward the lid. This ensures perfect alignment.

After cooling and unfolding, mounting the mainboard and accessories should be straightforward as all mounting points and openings are in place.

Happy printing and frameworking!