i attached a few pictures if a pcb for allegro 6281 16 pin QFN package, and of my mill that i use. i never thought i would get this to work.
i converted my sherline mill to 3/8 ball screws and antibacklash nuts. used
a A2ZCNC mill saddle for the base of the conversion. installed keling servo motors with 2500 cpr encoders to get the resolution i wanted on X and Y axis of the machine.
used a precisebits 45 degree cutter with a .0025 depth of cut for the etching.