for the past 5 weeks at the UWF FabLab i have been training on the machine. the device is a TechnoCNC L4896 (4ftx8ft) with vacuum and tslot. we are running a Porter Cable 3.25HP router to spin the endmill.
in the beginning i couldn't get the right tool profiles to load, but i was still able to sculpt my likeness.
once I got the tool profiles dialed in the resolution was much much better
I exported some Minecraft models and some USGS topo data to the machine:
and now i have sucessfully discovered a workflow for using this giant machine to mill my circuit boards: