

I made this for my son when he finished USMC boot camp in San Diego. The emblem is engraved on a 12" x12" granite tile from Home Depot. The work was done with a diamond drag from Widget Works.
The drag is just what it sounds like; a stylus with a diamond in the tip. The spindle/router is turned off for this toolpath. This was done with Widget Works' 120-degree diamond drag. The tip of the stylus is spring loaded. Setting depth of cut in your design software controls how much down pressure will be exerted by the tip. Harder material, more down pressure. The directions that come with the diamond drag are excellent.
This work can be done on glass, tile, metal.... It's a very cool addition to a CNC router.
This toolpath took about 3 hours. It was set up via the engraving toolpath in VCarve Pro.