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XL 6.4.0 Installation  

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Jasper
(@jasper-3)
Member
XL 6.4.0 Installation

Hi,

I downloaded the 6.4 Firmware last week and installed it today.

Now The display says I have to run the calibration. I have questions an hope someone can provide me with an answer.

Does the calibration after a firmware update means doing the same calibration as when the machine was put together (untighten pin, tighten pin, etc.)?

I've seen posts mentioning problems with 6.4, should I continue with the calibration or downgrade to the previous version of firmware?

Best Answer by jan.d.slay:

Prusa has stated regarding firmware 6.4.0that the issues will be resolved and that users should currently use 6.2.6 instead.

Posted : 13/02/2026 4:00 pm
jan.d.slay
(@jan-d-slay)
Reputable Member
RE: XL 6.4.0 Installation

Prusa has stated regarding firmware 6.4.0that the issues will be resolved and that users should currently use 6.2.6 instead.

Mods for Core One: Core One HT 450 degrees, Comfortable display , Very fast print start and Reducing noises
Mods for Prusa XL: Very fast print start

Posted : 13/02/2026 6:41 pm
1 people liked
Jasper
(@jasper-3)
Member
Topic starter answered:
RE: XL 6.4.0 Installation

Thanks.

Posted : 14/02/2026 4:07 pm
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