Dim3nsioneer 558
I continued on this issue and switched to a Sky Blue filament which seems to show the effect best.
In the meantime I got a new z nut from Ultimaker as the old one showed some significant play in all directions. The new nut hasn't got the play but doesn't solve the case neither.
The following picture shows three test prints. From left to right: old nut, new nut, new nut without fans.
The print settings were: The=210°C, Tb=60°C, 3731mm/s.
Obviously the filament is very sensitive to cooling compared to other colors. Shutting the fans off is not a solution as I got a very nasty line spacing at the top fill.
I already tried:
- Increasing flow by decreasing filament diameter settings to produce rather over extrusion
- Higher (220°C) and lower (205°C) temperature
- setting up new PID parameters for the hotend (achieved stability +/-1-2°C)
Nothing of that worked...
So I'm open for new ideas... :???:
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That kind of "banding" looks to me rather a consequence of the pretty high speed you are printing at. I can bet that if you are patient to try at 20-30 mm/s it will disappear. It is also that artifacts are more visible on white (with "adequate" lighting) than on colored material.
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