Good morning.

[Robin Hewitt]

I'd go for a mini mill CNC conversion if you want tiny detail, routers aren't accurate enough. Tiny tools take a long time to cut and you need a good concentric grip on them. You can get quite intricate if you get it right.

This pic shows a smallest possible letter 'S' I cut into aluminium using a desktop mill with a 5 micron step. This is extreme close up, spot the thread of tobacco and ballpoint pen tip. The cut on the right was a 1mm tool, the cut on the left was the 0.5mm tool (see pic 2). Tool turning at about 3000 rpm.

To do this required true zero backlash and a good flow of suds to carry the cuttings away. How small do you need to go?