Prusa XL Buddy Board Vented Cover
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This is an alternative to Prusa's metal unvented XL Buddy Board Cover
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The OEM Electronics Bay Cover is not vented resulting in the MCU temperature rising to >80°C. The motherboard also reads >90°. Prusa does not list maximum temperatures for these components, but such high temperatures cannot be conducive to long life.
There are a number of modifications that require one or two fans. Instead, I chose to install a heat sink on the MCU and to create a cover with large amount of vent holes. I chose to use 1.5mm hex holes in order to provide maximum protection against foreign object intrusion while creating a large, combined ventilation area.
This has resulting in a 10-15°C lower temperature on both components.
Given the relative high temperature in this area, the cover must be printed in ABS, ASA, PC, or other high temperature material.