New pre-release FW 6.2.0-RC1 for MINI & MINI+
Summary
- Changes
- Disabled switched fan test (XL)
- Bugfixes
- Fixed skipping a gcode after a pause
- Fixed HF nozzle not being on by default on new installations (Mk4)
- Fixed Z position bug after power panic, re-enabled power-panic (Mk3.5)
- Fixed print progress screen not opening when the timeout was set to 30 s
- Unused tools are now cooled down on the print start (XL)
- Fixed tools not heating after power panic (XL)
- Reduced cases of extruder stopping mid-print (XL)
- Fixed motor skipping/crashes in some situations (XL)
- Fixed estimated finish time showing nonsense sometimes
- Fixed considering steel sheet uncalibrated when minimum value set (Mini/Mk3.5)
- Added option to reduce display refresh speed (non-Mini)
- Fixed part cooling fans not spinning up during cold pull
- Regressions
- Dropped backward compatibility loaded filaments
This is a public release of the 6.2.0-RC1 firmware for the Original Prusa MK4/S, MK3.9/S, MK3.5/S, XL, and MINI+.
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.
Please note that this is a testing firmware developed primarily on stock unmodified printers. If you are running any 3rd party upgrade, exercise caution and let us know in case of any issues.
Changes
Disabled switched fan test (XL)
We have decided to remove the switched fan test from the XL. All our XL toolheads come preassembled from the factory, so there is no need for switched fan test. The fans have very similar properties and the test was not able to distinguish them with a 100% reliability issue #3480
Bugfixes
Fixed skipping a gcode after pause
We fixed a bug causing the first gcode after unpause to be skipped. This also presented itself when bed leveling failed, because the failure resulted in a print pause.
Fixed HF nozzle not being on by default on new installations (Mk4)
After a factory reset, the printer will be configured as the MK4S. However, the nozzle was set to standard instead of high-flow, which is now fixed.
Fixed Z position bug after power panic, re-enabled power-panic (Mk3.5)
In 6.2.0-alpha2, we have temporarily disabled the power panic for the Mk3.5 printer, because the printer could resume to a wrong Z position. This has been fixed now and the power panic feature was re-enabled.
Fixed print progress screen not opening when the timeout was set to 30 s
We fixed a bug in the firmware where setting the print progress screen timeout to 30 s would not open the screen at all. There are still some weird conditions limiting the displaying of the screen (such as minimum Z must be at least 1 mm), which we are yet to look into.
Kudos to @crasbe for pointing out the issue #4184.
Unused tools are now cooled down on the print start (XL)
The “Preheat” function preheats all tools on the XL. When printing a model that doesn’t use all the tools, the unused toolheads were left heating for the whole duration of the print. Moreover, they couldn’t even be turned off by G-code, because G-codes follow the tool mapping, making the unused tools inaccessible.
To remedy this, we now turn off all tools that are not mapped to anything at the start of the print.
Fixed tools not heating after power panic (XL)
We fixed a bug that was causing tools rarely not to heat up after power panic on the XL machines #3393.
Reduced cases of extruder stopping mid-print (XL)
We have received reports of the extruder motor stopping extruding on some XL machines, and implemented a fix that should remedy the problem for at least a portion of the affected users. However, we are still investigating the issue, and apologize for the inconvenience. The printer should now also be able to detect the extrusion dropout and go into a redscreen instead of continuing the print (17536 Extruder error). If the issue still persists for you after this update, please contact our support team.
Fixed motor skipping/crashes in some situations (XL)
We have fixed a number of kinematics bugs regarding XL toolchanges and homing #4240.
Fixed estimated finish time showing nonsense sometimes
We have fixed an issue where the estimated finish time occasionally displayed incorrect information #4196
Fixed considering steel sheet uncalibrated when minimum value set (Mini/Mk3.5)
When sheet Z-offset was set to the minimal or maximum value, it was wrongly considered uncalibrated. This has been fixed.
Kudos to @jenda122 for analyzing the issue #4295.
Added option to reduce display refresh speed (non-Mini)
We’ve received reports about occasional display irregularities, and we’re working to identify the cause. To assist with this, we’ve added a new “Display Refresh Speed” option in the “Settings → Hardware” menu.
If you’re experiencing display issues, please try setting this option to “Low” and let us know if it resolves the problem. We understand this setting may significantly slow down the display; this is a temporary measure only to allow us to identify the problem. We will issue a proper fix once we collect the data.
Fixed part cooling fans not spinning up during cold pull
During the cooling phase of the cold pull procedure, the part cooling fan was spinning up only for tool 1 issue #4249. This is now fixed.
Regressions
Dropped backward compatibility of loaded filaments
Due to a bug in the older versions of firmware, we had to drop backward compatibility of the currently loaded filament information. If you downgrade from 6.2.0-RC1 to an older firmware version, the printer will forget what filaments are loaded. Upgrading to 6.2.0-RC1 from older versions will work without any data loss.
Release notes: https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v6.2.0-RC1