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.
RE: Underextrusion and transport problems of the filament
Yes, I launched the recalibration and after the recalibration I printed a lot of parts without any problems and in good quality.
Today the spare parts from PRUSA arrived. The sent me a new hotend replacement including the nozzle. Tomorrow, I'll install the new hotend and stepwise will introduce your proposed changes:
- check if washer is install correct
- set the print file to the old standard settings
In order to be able to find the real root cause, I'll introduce only on measure per step and will check the improvment of each measure if any.
Regards Bernd
RE: Underextrusion and transport problems of the filament
I missed to mention following changes:
- change supports to snug version
- raise nozzle temperature by 5 K
RE:
I missed to mention following changes:
- change supports to snug version
- raise nozzle temperature by 5 K
You raised the nozzle temperature by 5° Kelvin? That's the same as 5C anyway so I guess it's a typo. Would have been an awesome sight if you raised it by 5000 degrees.
RE: Underextrusion and transport problems of the filament
I shall be precise as an old engineer. The absolut temperature scale in Europe and a lot of other countries is °C. Relative temperatures are defined by the unit K - Kelvin. Don't mix it up with the absolute temperature scale K, which starts at a value of -273,15 °C. So the right rate of temperature rise proposed her is 5 K - a relative value e.g. starting at 220 °C --> 225 °C.