On my printer I added an external 15cm pipe fan that blasts at the print. I only turn it on on prints that need it, but then cooling and overhangs are perfect.
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I've heard some reports that printing outer walls first has a positive effect on overhangs. I have it on in my slicer and it doesn't seem to negatively effect anything.
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Temperature, speed, flow rate, cooling.
In other words, close to anything. Follow a calibration guide. Also keep in mind that some filaments just don't make good overhangs.
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permalink
fedilink
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Very few printers are going to be able to do 90 degree overhangs even close to nicely. Bridging? Sure. With significant overhangs, it’s always going to wiggle a bit until you get some more layers.
If OP weren’t using this to get as close as possible, I’d say the answer was organic supports coming in from the bed.

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