Super-size 3D Printer
Ivan Miranda has built a few homebrew 3D printers, including three very big printers. His latest build – the Giant 3D Printer MkIV is his largest yet, with a 1000mm x 500mm (39.3″ x 19.7″) heated printing bed. Follow along with the build process, then watch it print a massive plastic wrench. You can buy the plans to build your own here.