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Jeggo
(@jeggo)
Estimable Member
Upgrade from MK3S

Hello,

I would like to upgrade from my MK3S to the CORE one. I have the full upgrade kit from MK3S to MK4S and the upgrade kit from MK4S to CORE one.
So this should work. Yesterday I read, that the firmware of the MK4S needs to be higher than 6.2.4 and that the CORE one would not start if it is not OK.

Today I read parts of the upgrade manual from MK3S to MK4S. Is it possible to just connect the XBuddy board (power lines and power panic line) to the new display and the power supply and start the firmware update? I do not want to build the full MK4S do the upgrade and disassemble it right after this to start the CORE one upgrade.

CU

Jens

Best Answer by k1mu:

 

Posted by: @jeggo

Hello,

I would like to upgrade from my MK3S to the CORE one. I have the full upgrade kit from MK3S to MK4S and the upgrade kit from MK4S to CORE one.
So this should work. Yesterday I read, that the firmware of the MK4S needs to be higher than 6.2.4 and that the CORE one would not start if it is not OK.

Today I read parts of the upgrade manual from MK3S to MK4S. Is it possible to just connect the XBuddy board (power lines and power panic line) to the new display and the power supply and start the firmware update? I do not want to build the full MK4S do the upgrade and disassemble it right after this to start the CORE one upgrade.

CU

Jens

See https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/completed-my-conversion-but-firmware-what-are-my-options/
Basically, disconnect the door sensor.

Posted : 06/08/2025 3:00 pm
k1mu
 k1mu
(@k1mu)
Estimable Member
RE: Upgrade from MK3S

 

Posted by: @jeggo

Hello,

I would like to upgrade from my MK3S to the CORE one. I have the full upgrade kit from MK3S to MK4S and the upgrade kit from MK4S to CORE one.
So this should work. Yesterday I read, that the firmware of the MK4S needs to be higher than 6.2.4 and that the CORE one would not start if it is not OK.

Today I read parts of the upgrade manual from MK3S to MK4S. Is it possible to just connect the XBuddy board (power lines and power panic line) to the new display and the power supply and start the firmware update? I do not want to build the full MK4S do the upgrade and disassemble it right after this to start the CORE one upgrade.

CU

Jens

See https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/completed-my-conversion-but-firmware-what-are-my-options/
Basically, disconnect the door sensor.

Posted : 06/08/2025 4:20 pm
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