Hello,
THAT WAS A GREAT LINK! (Yes, I'm shouting<G>)
The specific page doesn't load correctly, but most of the rest of the
site does. Just click on something across the top... I chose products.
Thank you!.
Ballendo
P.S. Why the tv and all that? Just use a laser pointer above, a
dremel below, and a spring loaded table. This could be a pretty
decent setup, IMO. Line up the laser with the dremel tool tip, and go
to town!
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
>
> > Wait a minute. Most of you guys are saying that I should drill by
> > hand instead of by using the press. I thought that what the press
was
> > for to get more accurate drills if that is the correct word. Can
you
> > guys elaborate on why hand drilling is better?
> >
> >
>
> No, it is not better at all..
>
> Carbide drills will produce better quality holes, less burr,
straight,
> etc..
>
> But you need to align the drill tip and board exactly.
>
> with drilling by hand the hole in the copper catches the drill and
centers
> it much easier.
> The disadvantage is you can not use carbide because it would break.
>
> If you have a press already i would use it. you have to align the
drill
> properly,
> that is the only way then.
>
> the other two possibilities are a cnc or such a professional
optical
> device.
> You can see them at
<
http://www.megauk.com/pcb_drilling_machines.php> but
> the page is down.
>
> It is a "upside down" drill press. the drill comes from the bottom,
on the
> spot on the top
> a viewing device is aimed. it has a screen and a target drawn on
this
> screen. you simply
> line the pad up with the target and press a switch. then a foot
comes down
> to hold the pcb
> and the drill comes up.
>
> We were thinking it must be possible to use a camera under a
standard
> drill press for this too.
> maybe you need to use a mirror or something because the camera lens
would
> get full of dust.
> maybe a vac sucking the dust up is the best way.
>
> Then use a old small TV to view the picture. you can even draw
rings on
> the tv to aid in centering.
>
> It is most likely you need no foot holding the pcb here, the
pressure of
> the drill helps holding it still
> while in the upside down setup it lifts it up. you also can simply
operate
> the drill press manually.
>
>
> I guess it is a good approach if you already have a press and
carbide
> drills. such a camera is really cheap
> and a small TV is no problem i would say..
>
>
> Stefan