Rotating Earth Lithophane

Large 220mm Lithophane on a base rotating at .6 RPM. The lithophane was generated at lithophanemaker.com and printed all white. I used a cheap set of watercolors to tint the ocean and land areas. The rotating base uses a small USB-powered, 59 RPM motor with a final gear ratio of 100:1. All stls are provided in the download section. The base consists of five printed parts and some additional parts that can be purchased from Maker's Supply. See links in the Bill of Materials section below for