What if you could build a working gear train without knowing what a pressure angle is? 

Most mechanical projects stall in the same place: the gears. Tooth count, module, pressure angle, profile shift: it reads like a homework problem, and a gear that's slightly off doesn't turn at all. Cogsmith, a parametric gear generator on Atomm, does that math for you—set how many teeth you want and how thick your material is, and it draws the geometry, animates the mesh so you can watch it turn before you cut, and flags problems like undercutting or thin tooth tips. Export as SVG or DXF with kerf compensation already applied, whether you're prototyping a robot drivetrain, building a kinetic sculpture, or cutting a gear model for a class.