Like computers, 3D printers went from big devices to just little device that can print 3D almost everything, all you need is just blueprint for printing item. Barely a decade ago, 3D printers were hulking, expensive machines reserved for factories and well-heeled corporations. They were all but unknown outside the small circles of professionals that built and used them. But thanks largely to the RepRap open-source 3D printing movement, these amazing devices have become viable and affordable products for use by designers, engineers, hobbyists, schools, and even consumers. If you’re in the market for one, it’s important to know how 3D printers differ from one another so you can choose the right model.