CM4-IO-CARRIER-CASE

Notes:

• This design is made using FreeCAD
• The case is designed to maximize convection around the carrier PCB.
• By design, there are no screws inside the case.  Consequently, the insert and the IO Carrier can dislodge if dropped.
• Before printing, it is recommended that you verify that the dimensions are suited for your purpose.
• The case is designed to fit an M2 adapter and NVME drive.
• Print using Prusa i3 MK3S+ or later.
• Print in PETG with a 0.4 nozzle.
• Print inside an enclosure.
• When printing the BODY, you will need to use paint on supports for the overhangs in the front.  

• Honest feedback encouraged

To assemble the case:

1. Insert 4 M3 Threaded Inserts into the Body.
2. Attach CM4 with the IO Carrier to the Insert.
3. Guide the Insert into the Body; press hard to ensure the Insert is level and firmly secured into the case. 
4. Affach the fan (AF-A9) so air blows onto the CM4 IO Carrier.
5. Connect the fan
6. Use 4 M3 screws to secure the lid. 

Settings:

• Perimeters=4
• Infill=Gyroid, 20%
• Layer Height=0.3

BOM

• SC0326 Raspberry Pi | Embedded Computers | DigiKey
• SC0678 Raspberry Pi | Embedded Computers | DigiKey
• Noctua NF-A9 PWM, Premium Quiet Fan, 4-Pin (92mm, Brown)
  https://a.co/d/bLH9zsw 
• M3 Threaded Insert Knurled Brass Nuts Female Thread
  https://a.co/d/5BKYaaO
• 25mm M3 Screw
  https://a.co/d/7WfWmY9
• 3d Printed Parts 
• Passive Heatsink for CM4

Credits:

Thank you, “Number One” for posting STEP files for the Compute Module 4 IO Board.

• Raspberry Pi Compute Module 4 IO Board | 3D CAD Model Library | GrabCAD

Thank you to the FreeCAD development team.

• FreeCAD: Your own 3D parametric modeler

Future Improvements

• Remove the need for screws.
• Recenter the front plate.