This is a project of the TU Delft and Protospace.It includes two Ultimakers joint together to print faster and larger without losing resolution.We've used:- Custom firmware- 4 wires soldered for communication- 5th stepper motor used for table movement through a 3D printed gear- Large table with rack laseredCheck for more information and how to make it yourself at:http://kamermaker2013.weblog.tudelft.nl/Watch a time lapse video of the process below:http://www.youtube.com/watch?v=Rzs3yCNtytQ