Design

FreeCAD: github.com/FreeCAD/FreeCAD
Mesh: https://github.com/cnr-isti-vclab/meshlab
Web: https://www.sketchup.com/plans-and-pricing/compare
OpenSCAD Functional programming language: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/General
2D/.dxf/.dwg: https://github.com/qcad/qcad | https://qcad.org

Slicer

.stl/.obj/.amf -> gcode

Ultimaker cura: https://github.com/Ultimaker/Cura
based on Slic3rhttps://github.com/prusa3d/PrusaSlicer

Web / OctoPrint: https://github.com/OctoPrint/OctoPrint
Web + Desktop / Repetier Host: https://www.repetier.com/download-now/

Modeling

https://zh.wikipedia.org/wiki/3D%E6%89%93%E5%8D%B0#%E8%BF%87%E7%A8%8B

FDM/Fused Deposition Modeling: 熔融沉积成型 | 1.75/2.85mm

Printer

光轴/导杆/导向轴 圆 精度< 方形线轨 or 双轴心线性导轨 | 滑轮/V轮:易磨损

Material

https://zhuanlan.zhihu.com/p/307980776

Printers

导轨调平:https://www.youtube.com/watch?v=dWpeKuIPFRE

Ender3 S1