I printed the following object (I'm printing the single opening version, Flower_pot_3.STL), and observed an unusual print artifact. I would like some idea of what's going on so I can avoid it in the future. The object is essentially an open-top box. In the image below, you can see a ridge along the bottom of the print. This corresponds to the upper surface of the bottom side of the box. The ridge is present for 4 layers, the same number of layers on the top surface. The defect is basically a positive ridge all the way around (not a layer shift). The G-code render below is for the top layer of the bottom surface.
- Printer is Prusa Mk3, with white PLA plastic. Nozzle is HS steel at 210 °C
- 0.2 mm Layer height, 15 % Gyroid infill, 3 perimeters
- Perimeters are printed first each layer, with the outer perimeter coming last. -
Ideally, I would like to know what caused this artifact, and what I could do to avoid it in the future. I can add more information as requested.