6.2.1 Firmware stable for MK4S
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.
Release notes: https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v6.2.1
RE: 6.2.1 Firmware stable for MK4S
Finally 🙂
Thanks a lot!
RE: 6.2.1 Firmware stable for MK4S
I'm just stunned this was released with the numeric error still unfixed. I've run into it myself now, with inexplicable layer shifts that go away when printed on older systems.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: 6.2.1 Firmware stable for MK4S
'Not HF Nozzle' status reset post-update
Funnily enough, I don't have a high flow nozzle installed, and this update set my nozzle status to HF. Because of these notes I knew to look for a change in nozzle status, and thanx to the nozzle type being accessible in Prusa Connect I was able to change back to "Not HF Nozzle" through the Prusa Connect tab in PrusaSlicer.
FWIW, the "is Hardened" that is set on my machine was not affected by either of the 6.2.0 or the 6.2.1 firmware updates.
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs