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Looks like you print too hot or with too low fans.
You want to cool the printed layer as fast as possible, that it is cool enough before the next layer comes. In the upper part, there is a kind of "support" of the previous layer and you don't see such effects, but the overhangs in the lower part have only very little support from the previous layer and that's the result.
Check if you can print cooler a little bit, check your fan speed and when the fan goes to full speed and maybe lower your print speed to give the layer more time to cool down.
In addition to what Smithy said about printing cool, printing thicker layers also may help. Then tend to sag less than thin layers in my models. The basic problem is that your overhangs are too steep.
Here comes Cura 5.9 and in this stable release we have lots of material and printer profiles for UltiMaker printers, including the newly released Sketch Sprint. Additionally, scarf seams have been introduced alongside even more print settings and improvements. Check out the rest of this article to find out the details on all of that and more
We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
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Smithy 1,146
Looks like you print too hot or with too low fans.
You want to cool the printed layer as fast as possible, that it is cool enough before the next layer comes. In the upper part, there is a kind of "support" of the previous layer and you don't see such effects, but the overhangs in the lower part have only very little support from the previous layer and that's the result.
Check if you can print cooler a little bit, check your fan speed and when the fan goes to full speed and maybe lower your print speed to give the layer more time to cool down.
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geert_2 558
In addition to what Smithy said about printing cool, printing thicker layers also may help. Then tend to sag less than thin layers in my models. The basic problem is that your overhangs are too steep.
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Sergiocarreiras 0
Thank you guys for your fast reply. A'll try yours orientations a comeback with a feedback.
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