Homebrew PCBs

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