Homebrew PCBs

I finally found the Ad for the spring loaded engraving tool I was referring
to. Claims it can engrave curved and uneven surfaces. But I guess I was
wrong. By the looks of it there really isn't any depth control as such. Just
that it can generally follow a surface.

http://www.2linc.com/spring_loaded_engraving_tool.htm

 

This design could easily be improved for PCB milling by modifying it to
where the engraving bit has a fixed stickout from a ball shaped spring
loaded nose of the tool. The one shown in the link might even work if the
engraving bit can be set back in the collett to a few thou stick out. The
nose could then press down on the surface of the PCB material. Seems like it
should work except for the driving over the swarf problem. Maybe I should
design one.

 

Thoughts

 

Sage