I was wondering what cooling solution you use for the Raspberry Pi 5/CM5?
When running my control code, CPU usage is between 70-80%, and the temperature is 80-86 C. The system flags indicate throttling due to reaching the maximum temperature. This causes slower operation and more jitter in the control loop timings.
It would be great if you could provide CAD of how the CM5 is fitted inside OSL. To get an idea of how CM5, the new electronics PCB, and other components could fit in the available space.
I do not have a CAD to share, but I did use a passive heat sink (see here). It worked well. We did used a custom 3D printed part to fit everything inside the electronics compartment
You could also try to use the casing as your heat sink or use an active one.
The problem is that I’m not sure how the CM5, the electronics PCB, and heatsink (with or without a fan) fit into the electronics space.
They certainly don’t fit into the part with the cutout for the RPi 5 ports. As shown in the attached illustrations, they don’t seem to fit into the space outside it either, without losing access to USB-C/XT-30 ports (unless I’m missing an obvious configuration). That’s why I’m interested in a photo that shows a successful solution.
With the alternative orientation, you can use 90 deg flat usb-c cable.
If you tilt the board, instead of having it fully vertical, you can have more space for both the XT30 and usb-c connectors.
Hello! We use a 3D-printed part to hold the RPi Compute Module, interface board, and heat sink, which was shared in earlier responses (thanks Louis!).
Please note that the screws used to secure the RPi CM5 and interface board to the heat sink (circled in the image) should be tightened very lightly. Overtightening these screws place excessive stress on the boards and could cause damage.
Thanks @ldevillez and @elissacimino . This is super helpful! I really appreciate sharing the CAD for the interface part.
Do you have a specific recommendation for the USB-C to USB-C cables? I assume the configuration shown in the CAD with the interface doesn’t require 90 degrees USB-C cables.
