Small Metal-cutting CNC.
Resources:
ftp://ftp.machsupport.com/Docs/Mach3%20Setup%20Tutorial.pdf
http://www.machsupport.com/wp-content/uploads/2013/02/Mach3Mill_Install_Config.pdf
https://www.machsupport.com/forum/index.php?action=dlattach;topic=12078.0;attach=16950