Topic: Moire - Might not always be in the printer
I just finished swapping out my extruder stepper with a high resolution .9º stepper. Couple this with the 1:32 stepper drivers that I have gives me over 400 steps/mm. On flat wall prints I have insane print quality. No artifacts show other than the infill which show as faint dark lines in the first picture. However, curved surfaces always tended to show moire that I thought was from extruder pulsing. After taking a second look at the STL and design, you see that the curved surfaces show small lines that resemble extruder induced moire. That is the result of most 3D modeling programs using polygons as circles so you circles are not round. This post is just to get the idea out there. I'm not saying all of it is due to the stl quality. I am trying a couple other slicing programs as well right now as well as some high resolution models. Hopefully I will find something that clarifies this once and for all!
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.