I originally designed this lamp to go on my own desk in the Instructables Lab, but due to popular demand I've had to make a few more. It's now available on the Instructables Store. I hope you like it!
I designed the lamp using Autodesk 123D and Autodesk 123D Make, then cut the parts using a laser cutter.
Here's how it all fits together:
Step 1: Designing the lamp model
To make a cross section of the lampshade, I used the Draw tool and the 3-Point Arc tool. Notice the grooves on the inside of the lamp; they're carefully sized to hold the electrical lamp components in place once the lamp is assembled. Everything else was just roughly estimated and tweaked as needed.
To turn the cross section into a 3D object, I used the Revolve tool. This tool spins a profile around an axis of your choice, producing an object with rotational symmetry.
I made the stand using a combination of hand-drawn splines and hemispheres, adjusting it until it looked sufficiently lampy. At the time of writing, Autodesk has not yet included a tool for accurately measuring the lampiness of a 3D model, so I had to judge that entirely by eye.
I joined the two parts together using the Combine tool (set to Join mode), then exported the object as an STL file.