Hi Bob-
I am not an expert on this, and I have no direct experience. I do know
that John Kleinbauer, who designs and sells plans for home built CNC
machines including PCB millers, recommends the bits sold by Think and
Tinker. I believe that carbide is the only way to go since the glass
eats up bits fast. John has an internet forum, but it is only open to
those who buy one of his plans from him. The list was open until
recently and was a good source of experience, knowledge and support
which might well be worth the price of a set of plans. You can see
John's machines/plans at:
http://www.crankorgan.com/Another source of information, although you have to spend time looking
for it, is at:
http://www.luberth.com/plotter/plotter.htmand if you are not aware of it you could try the Yahoo group
http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/Grant
--- In
Homebrew_PCBs@yahoogroups.com, "spoothammer" <spoothammer@h...>
wrote:
>
> Hi,
>
> I hope I'm not re-asking a worn out question... but here goes. What is
> the best tool to use to route printed circuit boards on an NC mill? I
> have a Sherline mill with the NC kit, Xylotex controller, and Master 5
> as the controller software. I am using Eagle PCB for designing boards.
> I just need to know what the best (meaning least expensive but giving
> good results & life). What does LPKF and the other board router
> devices use? Is Grizzly a good source? Tool steel or carbide?
>
> Thanks!
>
> Bob