Hi
"tomeka6" - On pictures maybe looks different but to me is all ok.
"adamkijak" - I also don't know that this belong to "scratch building" so I can not answer on this theme.
"Diobeu" & "Coppercat" & "mikemc" - This CNC is home-made and it was made by my friend, with mistake 0,02 mm. CNC could make everything you want, all is dependent on precision and mill tools. The small mill tool which I have home is 0,3 mm. How is CNC work? The first condition is drawing 3D, if you don't draw CNC will not do anything. I'm drawing with programme Solidworks.
Picture 1: I choose area on which I will draw "Front Plane"
Picture 2: I draw form of nut
Picture 3: I define dimension of nut
Picture 4: to nut I define thickness
Picture 5: the nut is concluded
Picture 6: on nut I choose the new area
Picture 7: I draw circle and define largeness
Picture 8: I define cutting
Picture 9: the nut is ended
Now follow part 2. This what I sketched in programme Solidworks I need to change to ending "dxf" because of programme Artcam and making "g code".
In programme I define which mill tool I will use and also depth of mill tool.
Picture 10: Artcam programme
Picture 11: nut and circle are encircled with red colour; this line means way of mill tool.
Now follow part 3 - CNc where I use programme "Mach3".
Picture 12: on left you see numbers, this is "g code"; on right you see nut, which it need to make out.