Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "leon Heller" <leon355@...> wrote:
>
> ----- Original Message ----- 
> From: "blalor76" <blalor@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Monday, December 21, 2009 12:31 PM
> Subject: [Homebrew_PCBs] Eagle design rules for Pulsar toner transfer
> 
> 
> > Morning, all.  I'm wondering if anyone has a set of design rules I could 
> > use with Eagle to help increase the likelihood of creating a layout that 
> > will work well with the toner transfer method and Pulsar's 
> > PCB-Fab-in-a-box.  Pulsar's site claims that you can do traces as small as 
> > 6mil, which seems much smaller than I need at this time.  For my layout 
> > thus far, I'm using 16mil traces which seem to be able to squeeze between 
> > DIP pads without too much difficulty, but I'm not sure how far apart 
> > traces should be from one another and from pads/holes to avoid shorts, and 
> > how large the pads/holes should be to avoid tearing them up when drilling.
> 
> You have to suck it and see; there are just too many variables with TT. 
> That's why I prefer photo-etch.

Ok, so taking the etching method out of the equation, I still need to drill out the holes without ripping them up.  Is that just a function of the size of the annular ring?