Homebrew PCBs

How VERY true...

If there is machine flex as the bit drills, AND/OR if the drill speed 
is too slow, you break drills. (speed here means BOTH RPM and 
downward rate)

If you're doing multilayer, then epoxy smear becomes a real concern. 
(Hey we've got Markus's and Jeremy's examples for the THP, and I'm 
working to provide the drill <G>)

Ballendo

--- In Homebrew_PCBs@yahoogroups.com, "crankorgan" <john@k...> wrote:
> 
> > 
> > If you own a milling machine you can drill the PCB with it, for 
sure.
> > 
>   Drilling requires a stiffer machine. Some homemade machines will 
allow
> the bit to walk around. It takes less of a machine to mill than 
drill.