After discovering CNC machine design and how to make a plotter machine from scratch during my stay at MIT I decided to build one for myself.
Using mechanical parts from MakeBlock I run Grbl on a arduino and a custom electronic circuit.
Thanks to Grbl I am now able to play with my drawing machine easily drawing some numeric art, maps, dynamic visualization.. etc
You can buy some of the drawing at : http://www.paulbouisset.tictail.com
Each one was is a unique edition.