As of 6.4.0, the XL still crashes toolheads into one another. It is inexcusable.

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Gerald

(@gerald-6)

Active Member

6.4.0 Firmware for Prusa XL

RE: 6.4.0 Firmware for Prusa XL

Hello.

Based on your feedback and the reports we’ve received, we’ve decided to withdraw firmware version 6.4.0 for the Original Prusa XL. The main issues are related to Phase Stepping calibration.We are currently working on a fix, which should be available in the coming weeks.

If you are experiencing Phase Stepping issues (noise), layer shifts, or random tool crashes, please downgrade to the latest stable firmware version, 6.2.6.

These issues affect only the Original Prusa XL. If you’re running firmware 6.4.0 on your MK4 or CORE One, there is no need to downgrade.

Napsal : 05/02/2026 6:17 am

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