Homebrew PCBs

On Sun, 13 Jun 2004 11:54:35 -0400 (EDT), <dg140@...> 
wrote:

> While drilling Many small holes in PCBS--or any plastic or plexiglass 
> for that
> matter--it seems that the bit will become coated with plastics.
> Either it just accumulates, or it can melt on the bit no matter what the
> right speed is.  So, how can this be handled?  Is there something which
> can be done to have the bit come up clean and not have the accumulation
> or coating interfere with the drilling?  I've thought of eleborate 
> cooling
> mechanisms combined ith vacuuums to both cool the bit as it eats its way
> through the day, and also suck the debris immediately away.  Sounds
> convoluted.
>
> Thanks
> Charles
>

I don't run into that problem with FR4, which material do you use?
I guess compressed air might cool it enough.

st