Flashing custom firmware
(CORE One L, CORE One, MK4/S, MK3.9/S, MK3.5/S)
Relevant for
MK4 family
MK3.9 family
MK3.5 family
CORE One family
CORE One+
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Your Original Prusa Printer has a main electronics board with the printer firmware. In their factory state, our printers only accept official firmware. To flash any unofficial firmware to a printer with the xBuddy board, it is necessary to break the appendix seal in it.
Before attempting this procedure, carefully review the description and the photo below.
To break the appendix, open the electronics box and locate a safety seal on the xBuddy board, with an exclamation mark on it. Then, take a small flathead screwdriver or very thin, sharp pliers and break off the thin middle part of the seal.
Once the appendix seal is broken, flashing firmware can be done following the procedure in the dedicated article on firmware updating.
1 comment
I don't think it is legally acceptable to tell a customer (who is a consumer): "We have provided this handy little seal for you. Feel free to break it, it won't even affect your warranty -- but the product may no longer be CE or UL compliant regarding fire safety." Which seems to be what this disclaimer says. You can't encourage a consumer to override a seal or fuse, and then disclaim product liability.
Prusa, could you please clarify the compliance and product liability implications?
Understandably, Prusa does not want to be liable for something beyond their control.
However, the current wording is ambiguous, as it suggests that a printer with a broken seal is automatically considered unsafe. If indeed something happens, this can cause rather unpleasant discussions with e.g. a home insurance company.
Therefore, it would be nice to have clarified that even a printer with a broken seal is still perfectly safe, as long as you are being properly cautious when choosing the firmware to be installed.