Filament doesn't extrude properly despite loading tests seeming to be all good.
I've recently built the MMU3 and am testing it on my MK4. I am doing a 5 filament test.
When I start the print, the very first filament used loads fine and prints fine.
Once it switches to the next one is where I encounter issues. Filament 1 will unload, with the filament sensor and superFINDA sensor reading turning on and off as expected. As filament 2 comes in, nothing seems out of the ordinary as well, with the sensors reading out as expected and the idler lever moving as well. However, immediately after it does this, the MMU3 backs it back out, and than backs it in again for no (discernible) reason.
Moreover, once it does get printing, the filament is not extruded! I individually extruded one filament, and the nozzle is not clogged or anything. The filament will than continue to swap to the other filaments, but nothing is extruded anymore.
I know that the filament is at least getting past the filament sensor due to the readouts, and since the idler lever does engage I figured it should be good from there, but I suppose it is not moving past that to actually get to the nextruder. All the load tests for all 5 filaments also seem to be fine, with the idler lever engaging as well as the sensor readouts looking good.
Has anyone had this issue? My working theory is that the MMU3 is pushing the filament just a smidge short of where it needs to be or that the nextruder is not catching the filament, but I imagine that there could be other issues as well.
Any help would be greatly appreciated