This is a Tutorial about how to use the limit switches of our CNC to find our machine origin. This is very usefull, because it provide us the possibility to have a very well defined origin, with a lot of repeatability and precision. Linux is much more powerfull than we expected, at least in my experience, and this is a powerfull tool. Take a look!
http://o3ozono.com/en/como-conseguir-el-origen-maquina-con-linuxcnc/
Having run Linux for 19 years now myself its power comes as no surprise to me.