AbeFM

From my experience, the hub loses itself from time to time anyway. So even if it had to rehome it wouldn't be a problem. It can be done pretty non-invasively.

I'm guessing the later one is to give the extruder selection process time to finish - one could argue this should be done by the select_extruder() function. The lead in...

I often get the button behaving wrong in a light press. Perhaps the read is to short to let the circuit settle, but the MMU buttons often act like one...

I can get it to go from Arduino - make sure you don't have Slic3r running in the background, it takes the port so you have to kill the program....

> @AbeFM from Windows it worked like a charm. I did not get this special 2-3 seconds gap you're describing. Just plugged it, opened Slicer, updated and it is working...

Don't forget that if there's any TPU in your print, speed gets set to 35% each time it's loaded, and stays that way. I've posted >5 times about this, forums,...

Totally with you - I applaud that the printer 'figures it out', but it's a good assumption the tube won't change length significantly from the first layer to the second,...

My MMU only grinds when something is wrong in the extruder. Filament doesn't get released on unload (often due to a string), or hits one of the multiple transitions above...

Mine reset randomly as well - I didn't note what was happening as carefully, I just ran alternate firmware again.

Did you make any progress on this? I had issues with cabling, all sorts of odd behaviors, typically one motor or another wouldn't move or would lose its place partway...