All of this done on a 0.4 hardened steel extruder using default settings for the Bambulabs filament.
Having trouble comparing this to the “common problems” I see online, it doesn’t seem to fit any of the other categories cleanly. Before just trying a bunch of things, can someone take a look at these photos and give some ideas as to what is going on here or where to start debugging?
Have you tried printing a temp tower. If you aren’t using Orca slicer, try it out and run the calibration screen. Execute the temp tower calibration and run it through 190 - 245c. It will take a while but what it will tell you is if you are having temp issues with your extruder.
If I were to hazard a guess, if the increasing temp doesn’t change the outcome, I’d be next looking at a faulty thermistor. If you’re control board is misreading the temp, one would expect this kind of extrusion problem. They are pain to replace but not too difficult to do.
Alternatively, you can simply check the cable to your thermistor and printhead and make sure it’s seated properly. If there is an increase in resistance on the thermistor, it would give a false reading to the controller board thus telling the printhead to print at the wrong temp.
Conversely, if the thermistor is OK, have you tried swapping the printhead?
Tried adding 5 and 10 degrees to the filament temp and it doesn’t look to have changed much. I also tried reducing the flow rate with the +10 degree temp change without much success.
I’ll try the temp slicer and investigate the thermistor next.
It looks like the problem was with the thermistor - I cleaned the nozzle and reset the thermistor and everything looks to be functioning correctly now.
