Selector at Station 2 while Feeding Station 1
Well I finally got around to fitting the MMU2S to my brand new I3Mk3S.
Have not managed to complete any 2 colour prints. Jams.
But now the MMU is trying to feed from Station 1 while the Selector (is at position 2). MMU is totally confused. This happens after a jam. Has happened many times
Seems like us customers are doing the R&D for Prusa. Not good enough.
RE: Selector at Station 2 while Feeding Station 1
Check your idler drum setscrews. If they are loose it will not align properly and feed the wrong path.
RE: Selector at Station 2 while Feeding Station 1
Also make sure it is not doing an "eject" action. When it does the selector moves out of the way and it pushes filament out so you can clip the tip off and with draw it completely from the machine.
RE: Selector at Station 2 while Feeding Station 1
Just experienced a similar issue: The Idler drum did stopped doing the full end stop calibration at initialisation and would feed the wrong filament compared to the selector (for example selector was correct at filament 1, idler would feed filament 2)
The solution was to factory reset the MMU, and it worked ring away after that. I followed this guide https://help.prusa3d.com/en/article/factory-reset-mmu2s_1920/