1.0.3-RC1 Firmware for MMU2

Power panic support

This firmware version ensures that power panic works correctly on MK3 printers with MMU2. In case of a power surge, the printer will save the latest G-code instructions and after the power is restored, rehomes and continues with the print.

Smarter operation

In the previous firmware versions, when the filament was loaded to the extruder during a power-on (e.g. resetting the printer), the user had to manually remove the filament first. Otherwise, the MMU2 unit was unable to finish the initializing sequence. Starting this firmware release, the unit finishes the sequence with filament loaded and when there is a need to move with the selector (e.g. a user wants to use another filament slot), the printer indicates with all LEDs flashing red to unload the filament first or in case of resuming the print after a power failure, the printer unloads the filament by itself.

Faster Individual Filament Calibration

Now, there is a possibility to speed up the movement of pulleys while adjusting the filament position during the PTFE length calibration by pressing the left/right button for a longer period of time. Also, the maximum value of the PTFE tubing length was increased. These two changes should help users with custom modifications (such as using the MMU2 inside an enclosure with longer PTFE tubing).