Re: gEDA-user: Fiducial

[joeft <joeft@xxxxxxxxxxxxx>]

John Griessen wrote:

> Dan McMahill wrote:
>
> > > > Does this need to be a feature?
> > >
> > > I'm not an expert in PCB layout tools but  it seems worthy 
> >
> > I think it is important but I'm not sure when I'll have time.  I 
> > wonder if maybe just a "nopaste" flag for pins/pads is enough. 
>
>
> If we could show it as a layer and add a rectangle, I think it would 
> be less error prone.   Checking for such rare things as an added 
> rectangle on soldermask or paste could be like:   show only 
> solderpaste layer, select all, see count.

Having the paste patterns shown explicitly and having a way to 
explicitly create a paste pattern would be the general way to do it.  
Same thing for the solder mask.  There have been lots of times where I 
just wanted a rectangle cleared of solder resist. that is not tied to a 
part.

PCB really should be able to cleanly deal with layers that are not copper.

Joe T

> As far as one side only fiducial workarounds, how about these:
>
> Make opposed, offset L lines in a copper layer so their edges are on 
> intersecting X and Y axes.  Etching results might make the edges eaten 
> back from a perfect line through them all, but you could still use 
> them as fiducials by aiming for the middle of the gap.  This 
> approximates a fiducial of alternating squares of black and clear.
>
> Another is a zero length line to get a circle of copper layer.  Same 
> as a zero diameter via, but on one side only.
>
>
>
>
>
> _______________________________________________
> geda-user mailing list
> geda-user@xxxxxxxxxxxxxx
> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user



_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user