A mark of a good 3D print ... This Slinky model was made using a few lines of JavaScript that output a Gcode file. There is no .STL file, and you can’t edit this CNC Slinky in any CAD ...

[Steve] is using TouchTerrain, an open source project helmed by [Dr. Chris Harding] of Iowa State University, to create the model which gets fed to the CNC machine. Originally intended for 3D ...