Any ideas on this nasty scar (non z-seam)?
I'm having difficulty troubleshooting the scar you see in the photo. It occurs on a sloped cylinder, which I know are difficult to print, but the angle isn't too severe and the scar only occurs on one side (the other side is flawless) so I don't think it's related to the angle? This is PETG, but it also occurs using ABS. Z-seam is set to random. It's almost as if a "divet" was taken out of the side. Is it possible this is underextrusion?
I'm stumped. Any hunches? I'm using PrusaSlicer and printing on an mk3s.
RE: Any ideas on this nasty scar (non z-seam)?
It is an awful small part. Did you print just the one?
Reslice it and print 3 or 4 of them. Uncheck "finish one at a time" so that they each get printed layer by layer at the same time.
I think you're dealing with overheating. Having more instances will move the head away from each part long enough for it to cool so it doesn't sag.
RE: Any ideas on this nasty scar (non z-seam)?
Yep you're correct! I realized the defect was always happening at the rear of the print, no matter how I oriented the part. It seems the cooling in the rear is worse than upfront (makes sense, I suppose, but I was a bit surprised). At 100% fan speed and by printing multiple parts at a time it's significantly improved. Are there any other optimizations I can make that come top of mind, or is this probably as good as I can do without a new duct? Thanks!