Homebrew PCBs

Stefan,
what I was using were pads without copper, but maybe
this is not the best way if I'm going to send this
design to a PCB manufacturer.  Also, I found out that
clearance holes must be at least a 5% larger than the 
screw diameter.  A rule of thumb is to use clearance
holes 10% larger than screw diameter.

Regards

Jose

 --- Stefan Trethan <stefan_trethan@...> escribi\ufffd:

> 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
> 
> 
> Be sure to visit the group home and check for new
> Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
> 
> If Files or Photos are running short of space, post
> them here:
>
http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
> 
> Yahoo! Groups Links
> 
> 
>     Homebrew_PCBs-unsubscribe@yahoogroups.com
> 
>  
> 
> 
> 
> 



	

	
		
___________________________________________________________ 
1GB gratis, Antivirus y Antispam 
Correo Yahoo!, el mejor correo web del mundo 
http://correo.yahoo.com.ar