RE: Underextrusion and transport problems of the filament
Yes, long time ago I opened the planetary gear because of a similar malfunction (underextrusion) of the extruder. But the reason for the previous malfunction was the blocking of the filament coil, which finally caused a stucking of the filament in the nozzle which couldn't be removed anymore.
The failure in the past occured during a 10 h print job. The printer completed the print job but appr. after 5 h the filament coil didn't rotate anymore and the stucking of the filament in the nozzle began. So I had to replace the nozzle. I don't know if this previous failure has any impact on the current malfunction. In the meantime I printed a lot of other parts successfully. I will check the gear and the presence of the washer. I think, afterwards I have to recalibrate the gear, isn't it?
Thank you for your advice!
RE: Underextrusion and transport problems of the filament
Be aware that when you open the planetary gearbox you should run the gearbox calibration after reassembling it.