I recently purchased a Creality Ender 3 Max as my first 3D printer and overall I am quite impressed with the print quality after only leveling the bed.
However, every print I have done so far has had bumps on the outer walls, limited to a section of the lower layers, usually around 6 layers in height.
Standard print settings:
- 1.75 mm PLA filament
- 0.2 mm layer height
- 20 % infill
I have tried:
- Prusa Slic3r (default settings) vs Cura for my slicing. Prusa Slic3r exaggerated the effect compared to Cura.
- Increasing the extruder and heated bed temperatures (200 °C & 50 °C, 210 °C & 60 °C, 225 °C & 70 °C). Higher temperatures seem to reduce the effect.
- Reducing the print speed from 50.0 mm/s to 35.0 mm/s. Slower print speed seems to reduce the effect.
My next experiment will be to combine a higher extrusion temperature with reduced print speeds however I suspect that this is just making the print more forgiving and masking a different cause.
Does anybody know of a way I can eliminate these artifacts?
Further experiments I can run to debug this or even the correct terminology or search terms for this (I'm having difficulty finding anything that looks like this problem online) would also be greatly appreciated.
- Test print with 0.1 mm Z Offset shows a slight improvement but does not resolve the issue.
- Test print with 0.2 mm Z Offset shows no improvement over 0.1 mm Z Offset and nearly compromises bed adhesion.
- I printed a 20 mm cube benchmark. X and Y measurements are spot on but the Z axis measures 19.2 mm.