비평면 슬라이싱 90° 오버행잉 프린팅에 성공 3D PRINTING 90° OVERHANGS WITH NON-PLANAR SLICING

3D PRINTING 90° OVERHANGS WITH NON-PLANAR SLICING

March 8, 2021 

 

When slicing a model for 3D printing, the part is divided into a stack of flat, 2D layers. But there’s an alternative in the form of non-planar slicing, where the layers can follow 3D curves. [Rene K. Mueller] took this a step further and successfully used non-planar slicing to print 90° overhangs on a normal Cartesian FDM printer.

 

   3D 인쇄를 위해 모델을 슬라이싱할 때 부품은 평평한 2D 레이어 스택으로 나뉜다. 하지만 비평면 슬라이싱 형태의 대안이 있다. 층들은 3D 곡선을 따라갈 수 있다. [Mueller]는 한 걸음 더 나아가 일반 데카르트 FDM 프린터에서 비평면 슬라이싱을 사용하여 90° 오버행잉 프린팅에 성공했다.

 

 

비평면 레이어는 한동안 존재했지만, 일반적으로 레이어 라인 없이 부드러운 곡선을 만드는 것으로 제한되었다. 오버행(overhang)에 대한 이 기술을 사용한다는 생각은 한동안 [Rene]의 머릿속에서 떠돌았고, 그는 여기 Hackaday에 나타난 회전 기울어진 노즐 프린터를 보고 행동에 박차를 가했다. 아이디어는 각 층이 돌출부를 향해 아래로 경사지게 함으로써 각 층의 바깥쪽 가장자리를 갖는 것이다. [Rene]은 이러한 목적을 위해 원뿔형 슬라이서 알고리즘을 프로그래밍했는데, 이 알고리즘은 모델을 양파처럼 돔형 층으로 분할한다.

 

*오버행잉프린팅(Overhanging printing)
돌출부라는 뜻으로 3D 프린터를 사용할 때에는 적층 시 수직이 아닌 특정의 각도를 이루면 적층이 되는 부분을 의미한다

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황기철 콘페이퍼 에디터

Ki Chul Hwang Conpaper editor 

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edited by kcontents

 

Non-planar layers have been around for a while, but were generally limited to creating smooth curves without layer lines. The idea of using the technique for overhangs had been floating around in [Rene]’s head for a while, and he was spurred to action after seeing the rotating tilted nozzle printer featured here on Hackaday. The idea is only to have the outer edge of each layer overhang, by making each layer slope downward toward the overhang. [Rene] programmed a conic slicer algorithm for this purpose, which splits the model into dome-shaped layers, like an onion.

 

90° Overhangs without support structure on 3-axis 3D printer

 

XYZ dims

edited by kcontents

 

He did a lot of testing and documented the results in detail. Conical slices were compared with tilted slices, which are also used for belt 3D printers. Both have some geometric limitations. Tilted slices can only print the overhang in one direction, but conical slices can do this in all directions, allowing it to create a mushroom-like shape without any support. The limitation is that it can only print inward or outward from a central point. More complex geometry must be segmented, and each sub-volume sliced separately. The slicing angle is also limited by the shape of the print head, to avoid it crashing into the print.

 

We think this technique has a lot of potential for widespread use, especially since it is compatible with most existing FDM printers. It is still a work in progress, but support has already been added for Slic3r and Prusa Slicer. We look forward to seeing how it develops and gets adopted.

 

https://hackaday.com/2021/03/08/3d-printing-90-deg-overhangs-with-non-planar-slicing

kcontents