Anybody any clue what’s going wrong here ?
Just some ideas:
Is the nozzle clogged or still free running after this printout?
Do you use retraction for this print?
How is your fan working?
I experienced similar results for two conditions:
Hot end too hot: material will degrade in the nozzle, for too much retraction it will stuck sonwhere in the hotend.
Temperature too low: filament will slip in the extruder, having too few material for extrusion.
The onset/switch off of the fan for these smaller part can induce this deviation
Do you have any other observation which may give you a clue?
Does this happen with all models and colors?
Or just this model?
[quote=“Wrong Way”]Does this happen with all models and colors?
Or just this model?[/quote]
Happend with several models I tried.
Just got this machine so still trying to learn the basics.
Apparently temperature was set to 210 standard, lowered it to 190, waiting for the results.
You may also want to change the retraction in the Cura configuration Extrusion tab.
I have Retraction set to 4mm Retraction Speed set to 110mm
Tested with temperature set to 190, slightly better result, but still there’s this band were it’s not printing OK and the material gets very brittle.
Strange is that the first part and last part are OK.
I’ll do some tests to see if it’s the problem occurs after a certain amount of time or at a certain height.
[quote=“Wrong Way”]You may also want to change the retraction in the Cura configuration Extrusion tab.
I have Retraction set to 4mm Retraction Speed set to 110mm[/quote]
I found the settings, but what exactly is this ‘retraction’ ?
When the print head moves from part of the project to another with out printing it will pull the filament (retract) back up into the head so it doesn’t drip out during the move.
It is strange that the top an bottom turn out for the most part to be OK and the middle was so bad.
Do you have a different roll of filament to try.
I’m thinking there might be some inconsistencies in that roll.
One strange thing in your result is the de-colouring of the material. This in for me an indication of over-temperature. Did you observe a change in the fan flow during the suspicious layers? Is there any change in the temperature during the printing of this area?