I. Introduction

OpenSCAD is a free, open-source CAD tool for building solid 3D models using code. You write a script that describes your part using primitives in 2D and 3D, transforms (translate/rotate), and boolean operations (union, difference, intersection). Extrudes lets a 2D object extend or rotate into a 3D object.

OpenSCAD is useful for 3D printing, fixtures/brackets/enclosures, and mainly used for parametric parts. A part being parametric means its dimensions, shape, and features change dynamically based on input values or equations, rather than being fixed.

II. Outline

  • Core modeling tools (what you’ll use constantly)
    • Primitives (3D): cube(), cylinder(), sphere(), polyhedron()
    • Primitives (2D): square(), circle(), polygon(), text()
    • Transforming Operations: translate(), rotate(), scale(), mirror()
    • Boolean Operations: union(), difference(), intersection()
    • Extrusions: linear_extrude() and rotate_extrude()
  • How parametric modeling is written:
    • Variables for dimensions
    • Reusable Modules or Functions
    • Loops and conditionals
  • Import
    • “use <>” and “include <>” to pull in other .scad files
    • This lets you build a small parts library that can be reused for larger projects.
    • MCAD is an OpenSCAD library of reusable mechanical parts/features (e.g., fasteners, bearings, gears) instead of rebuilding common geometry. The Link is under FreeResources
  • Export
    • Export solids/meshes for 3D printing
    • Export 2D profiles for laser/CNC workflows
    • Preview vs Render
      • Preview is fast and interactive
      • Render computes final geometry (needed before exporting)

III. Free Resources

Official:

IV. Video Series

V. See Also