Homebrew PCBs

On Wed, 08 Feb 2006 17:42:18 +0100, Jose Fuentes  
<josecarlosfuentes@...> wrote:

> I am designing a board that will have two holes for
>
> screws.  How can I place those holes in the PCB
>
> without using pads?
>
>
> Regards
>
>
> Jose


I fear that depends on your software.

Mine has a feature for placing holes, but it is basically only a pad  
(usually) without electrical signal.
You can set copper diameter and drill diameter individually, if drill  
diameter is the same or larger there will be no copper ring around the  
hole.
It should be possible to use a normal pad if your software doesn't allow  
for special holes.

As for producing the PCB, i will usually print with option "centering  
holes only" which reduces the size of all holes to what is useful in  
centering the drill. Then i'll drill there with some small drill i use for  
other pads, and at the end enlarge the hole with the right size drill. I  
want a hand puch for punching them holes for ages, but they don't seem to  
find their way over the atlantic.


ST