Still having issues with the dual extruder calibrating but I have tried to connect Luban now and get a message that the configured nozzle diameter (0.4mm)is inconsistent with the machine (L: undefinedmm; R: undefined mm). I don’t see anywhere in the manual where I a able to define the nozzle diameter on the machine. Latest version of Luban and firmware.
I have the same issue…
If you go to the snapmaker luban 4.7 issues thread, the developers know. It’s a bug and being fixed.
Just hit cancel and it will work. But in 4.7.3 released a few days ago it is still present.