6.2.4-RC1 Firmware for Original Prusa MK4
Summary
- Reduced USB errors
- CORE One printer detection
- Fixed returning to wrong Z position after pause
- New print fan type [XL]
- Improved extruder error detection [XL]
This is a public release of the 6.2.4-RC firmware for the Original Prusa MK4, MK4S, MK3.9, MK3.9S, MK3.5, MK3.5S, MINI & XL.
This is a release candidate intended for experienced users. We’ve not been translating changed/newly added texts yet. The features in this firmware are still under development and may not perform as expected. Should you encounter any bugs or issues with the printer’s performance, please report them via GitHub or in our forums.
Reduced USB errors
We fixed a rare condition that could occasionally trigger a “USB Error” pause during printing.
CORE One printer detection
The firmware brings a new bootloader version 2.4.1, which is able to recognize MK4S from CORE One (based on whether the door sensor is connected).
NOTE: Before you convert your MK4S to CORE One you need to update the FW to 6.2.4. If xBuddy is already connected in CORE One and the door sensor is attached, the bootloader refuses to update. We will remind you of this in the MK4S to CORE One Conversion Guide.
Fixed returning to wrong Z position after pause
When unpausing, the printer was not applying the MBL correction to the unpark move.
This was already fixed in 6.2.3, but 6.2.3 was only released for MK4 and MK3.5. 6.2.4 brings this fix to the XL as well.
New print fan type [XL]
We have extended our list of suppliers for print fans on the XL. The new fans have slightly different properties. Since the printer cannot automatically detect which fan is installed, we have added a settings option (Settings -> Tools Settings -> Print Type Fan) for selecting the correct fan type the printer is equipped with.
Improved extruder error detection [XL]
Extruder errors (extruder not spinning) should no longer trigger for parked tools.
RE:
I'm not sure where to ask this, so please direct me to the appropriate place if this is not it...
Since updating the software, my printer has been having some MAJOR print issues. At first, it was what I think is called a layer shift - the first few layers would print fine, but then there would be a massive (up to one centimeter or more!) shift towards the back of the build plate, at which time the build would finish. My most recent attempt resulted in shifts towards the back...then towards one side...then appears to be back towards the front. It is a hot mess! This is on a print I've successfully completed probably 20 times and with filament that I've used successfully several times. Any advice on what to do? Would this be an update issue...or something else?
Edited to add: My current firmware is 6.2.4+8909