Homebrew PCBs

If youtube has issues with it why not just upload the video files to something like rapidshare and we can all download a copy instead?

--- In Homebrew_PCBs@yahoogroups.com, Mitch Davis <mjd@...> wrote:
>
> On 12/25/12, Harvey White <madyn@...> wrote:
> >
> >>Now that makes me wonder, as there are recommend speed rates for cutting
> >>materials.
> >>
> >>What are the correct rpms for through drilling "virgin" boards and
> >>different dia holes?
> >
> > Generally, from about #50 on down, I use at least 20000 RPM, and would
> > use 30 from #60 on down, if I had something that did it.
> 
> Not uncommon for the drilling machines in the fabs to run at
> 200,000RPM.  They are insane to watch.  The drill heads pop up and
> down as fast as the needle on a sewing machine.  I took some video at
> the recent Shenzhen China PCB show, but because Youtube is blocked in
> China, it's difficult for me to show you.
> 
> Mitch.
>