https://code.google.com/p/open-forming/
http://blog.arduino.cc/2014/02/04/automated-vacuum-former/comment-page-1/
http://punkmanufacturing.com/wiki/open-source-vacuum-forming
http://www.cnczone.com/forums/vacuum-forming-thermoforming-etc/139156-vacuum-forming-machine-open-source-project.html