Homebrew PCBs

I was thinking that the board would have to be upside down when you 
drilled it because the camera would have to see the top of the board, 
but you're right, there will be pads on the bottom of the board, 
too.  Yes, camera on bottom is probably better, and certainly easier 
to implement. I've got a video otoscope that's made for close focus - 
have to give it a try.

Mark

At 04:25 PM 5/24/2010, you wrote:
>Actually it would be less cumbersome, because you could see the drill
>and not only rely on the camera.
>Also you can do without the clamping foot for a top down drill.
>
>When I built my drill stand I prepared it for an optical sight.
>It is a top drill setup, and I was considering a simple projection
>mechanism (think overhead projector) that looked on the board from
>below. I experimented with a lens and some mirrors and I think it
>might have worked.
>
>Plan B was to use a small camera instead, if the optics didn't work out.
>
>Turns out I don't need any optical sight after all.
>
>ST
>
>
>
>On Mon, May 24, 2010 at 10:09 PM, Mark Lerman <mlerman@...> wrote:
>
> > Very nice solution, and an obvious (now that it's pointed out) way to
> > go. A bottom drill with a camera sight, a modified microscope stage
> > to hold the board and you're done!  Of course, it would be just as
> > logical to put the camera on the bottom and the drill on top. Just
> > have to maybe use a little vacuum  to stop the drill debris from
> > covering the lens. Might be a little more cumbersome than a bottom
> > drill because you would be completely dependent on the monitor, but
> > still should work well and be easy to implement.
> >
> >
> > Mark
>
>
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