MMU3 at CoreOneL will not work, always unloading the Filament
Good evening,
Today I tried to use the MMU3 on my CoreOneL. I used the official Instructions by Prusa and the same Buffer. The PTFE goes through the lid the same way like the regular one.
If I try to print something, as soon as the filament reaches the filament sensor of the Nextruder he tries to pull it back to the FINDA of the MMU3 imediatly. This is not possible because it has been pulled by the Extruder and create a faul message.... and the Filament is stuck.
I have absolutly no Idea how to solve this issue. The MMU was used on an MK4S without any problems.
What I tried and have done yet:
- Software MMU: 3.0.4
- Software CoreOneL: 6.5.3+12780
- conversion of printer according instructions by Prusa
- Nextruder conversion for MMU
- calibration of gearbox and filament sensor
- Printer is printing with deactivated MMU without any issues
- The PTFE from MMU to the Nextruder is 980 mm long, and I set the printer to a PTFE length of 980 mm
- The side filament sensor is switched on as prusa recommand
- Loading to MMU works
- For all testes, there is only one Filament loaded to the MMU, on position 1
- I tested all 3 filament sensors of the printer and all of them give a signal and the signal visible on the screen
- If I set the PTFE length to 700mm, the fast loating to the Nextruder stopps early an it loads slowly until the filament reaches the FSensor and the magic happens -> it tries to pull back to MMU ...
- If I set to 1000mm it will extrude some Filament and magic again -> ....
- Fastening the bolts on the swivel changes nothing untit it is too strong, in this case it get stuck -> magic is going to happen again...
- Losening the bolts on the swivel will end the Fsensor is not switching correct or too early / it is trapped in a loop of load und pulling back to FINDA
- The Loading Test function is ending in a loop of doom too
Does anyone has an Idea what could be the problem? That is driving me completely crazy.
RE: MMU3 at CoreOneL will not work, always unloading the Filament
Well I tried with the support about 1h everything.
Nothing worked, it get a level 3 topic. They gave it to the devs, lets wait what they figure out.