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6.2.1 Firmware for Original Prusa MK4, MK4S, MK3.9, MK3.9S, MK3.5, MK3.5S, MINI & XL
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@danopernis danopernis released this 18 Feb 13:49
· 1419 commits to master since this release
v6.2.1
4a137bb

Summary

  • 'Not HF Nozzle' status reset post-update
  • Recalibration of X and Y Axes after reset
  • Support for M30 G-code

This is the stable release of firmware version 6.2.1 for the Original Prusa MK4S, addressing issues identified in version 6.2.0. This update is recommended for all users.

'Not HF Nozzle' status reset post-update

In firmware 6.2.0, a check was implemented to prevent printing G-codes with high-flow profiles on printers without a high-flow nozzle installed. However, after updating, all nozzles were defaulted to 'not high-flow,' leading to incorrect warnings for many MK4S users.
With firmware 6.2.1, MK4S printers will default to recognizing the nozzle as high-flow. Users can adjust this setting in the printer's menu under Settings.
Reported on GitHub #4401

Recalibration of X and Y Axes after reset

A bug causing MK4 series printers to lose their homing calibration upon startup has been fixed. This ensures that X and Y axes retain their calibration settings after a reset.
Reported on GitHub #4185

Support for M30 G-code

The M30 G-code command, which allows for file deletion from the printer's storage, has been backported from firmware version 6.3.0 to 6.2.1.
Reported on GitHub #4429 and fixed by community contributor @bkerler

Known Issues

Numeric error accumulation possibly causing layer shifts

A recently discovered numeric error accumulation bug may cause layer shifts, particularly on prints using gyroid infill.
A fix is currently being tested and is expected to be released in an upcoming firmware update.

Full Changelog: v6.2.0...v6.2.1

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