Jagged Perimeter Artifacts
Hi everyone,
Total FDM rookie here.
I'm encountering a weird jagged perimeter draw on a lid I'm printing. Seems to happen on first layer of cantilevered "lip" of the lid (picture shown is the underside of the lid). What should be a smooth curve is faceted in a seemingly random way. It seems like this problem happens on only a couple layers. I've checked the slices and there is no indication of this anomaly.
Any ideas what is going on here?
Thanks,
RE: Jagged Perimeter Artifacts
Did you use supports?
If you use Supports, check contact Z distance and consider using the removeable setting...
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Jagged Perimeter Artifacts
Looks like you're trying to print in thin air. As @joantabb said, you'll need supports to, well, support the overhanging lip.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: Jagged Perimeter Artifacts
I'm unclear if that picture is the top or underside of your print. It looks like a view from the top to me. Those odd extrusions are caused by poor inter-layer adhesion. The filament gets pulled taut as it becomes dislodged and is pulled across the arc. If each layer doesn't have enough filament underneath it -- very possible with a sharply sloped or filleted underside -- there's simply not enough filament below to grab onto.
Slowing down, increasing temp/decreasing cooling, and reduced layer heights can help. Wider perimeter extrusions may help provide more underneath. I'd try slowing down 50% using the front knob as a quick test to see if it improves. If the underside is sharply curved or angled, it may require support (which will give ugly results). You might want to redesign the part to use chamfers instead, if it's your design, or reorient the part to minimize the overhang angle.
It would help if you'd save your part & settings in a 3MF project file, zip it up, and attach the file to a reply here. That way we can examine your part, orientation, and settings to identify possible issues.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan