Downgrading from MMU2S to MK3S
After trying and failing to get the MMU2S working reliably for over 6 months now, I've finally decided it's not for me. I'd rather the greater reliability of the base MK3S setup, so I'm looking to downgrade.
Does anybody know how to do the downgrade? Is it simply a matter of unplugging and removing the MMU then flashing MK3S firmware?
RE: Downgrading from MMU2S to MK3S
just unplug , and you prrobably want to switch their sensor on the extruder and the extruder door back to mk3s style. the firmware does not change.
RE: Downgrading from MMU2S to MK3S
just unplug , and you prrobably want to switch their sensor on the extruder and the extruder door back to mk3s style. the firmware does not change.
Thanks David. I just unplugged it and flashed the other firmware and it seems to work fine even though I didn't change out the sensor. I'll post here if I have any other updates.
If I ever reattach the MMU2 I think I'll make an external disconnect for all the cables do I can more easily bypass it entirely for single material prints. If only I didn't also have to reflash the firmware in between...
RE: Downgrading from MMU2S to MK3S
you don't have to reflash 3.7.2 is common to both. if the data ribbon cable is unplugged it runs as a plain mk3s, once it sees the data from the MMU it switches mode to mk3s+mmu. if you are quick at power up you can see the menus change after the mmu boots and talks to the mk3
RE: Downgrading from MMU2S to MK3S
That's great news thanks David, so I can leave the MMU2 firmware installed next time if I swap the MMU back in and out.
And Gemm: I left the IR sensor alone (elevated mount) and it seems to be working fine.
RE: Downgrading from MMU2S to MK3S
I think the main reason there's two different styles of IR sensor is that without the MMU attached the printer needs to detect the end of a filament earlier, otherwise there's not enough of it left to reverse the end out of the extruder.
I doubt it will be much of an issue in daily use, you can probably just push the next spool of filament in behind the previous one.
I wish there was a way to disable the MMU with a setting in the lcd menu without having to unplug any cables, then all we would have to do is pop out the pfte fube from the extruder and direct feed filaments. I would like to leave the MMU loaded with PLA and direct feed PETG for instance.
RE: Downgrading from MMU2S to MK3S
I think the main reason there's two different styles of IR sensor is that without the MMU attached the printer needs to detect the end of a filament earlier, otherwise there's not enough of it left to reverse the end out of the extruder.
I doubt it will be much of an issue in daily use, you can probably just push the next spool of filament in behind the previous one.
I wish there was a way to disable the MMU with a setting in the lcd menu without having to unplug any cables, then all we would have to do is pop out the pfte fube from the extruder and direct feed filaments. I would like to leave the MMU loaded with PLA and direct feed PETG for instance.
I had to do this while troubleshooting a bad print.
I selected Single-filament mode, unscrewed the ptfe-tube and set it aside, selected a filament that was loaded in the MMU and as soon as the MMU started to load the filament into the ptfe-tube I inserted the filament manually in the extruder. That will stop the MMU from spitting the filament out more. I just left the filament half way in the ptfe-tube while printing and let the MMU pull it back after the print was done, but if you want to you can pull it back manually.