Mail Archives: geda-user/2016/01/26/12:41:57

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From: "Gene Heskett (gheskett AT shentel DOT net) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] [pcb] poll: burried/blind vias vs. pcb and pcb-rnd
Date: Tue, 26 Jan 2016 12:41:41 -0500
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Reply-To: geda-user AT delorie DOT com

On Tuesday 26 January 2016 09:47:02 Evan Foss (evanfoss AT gmail DOT com) [via 
geda-user AT delorie DOT com] wrote:

> On Mon, Jan 25, 2016 at 10:21 PM,  <gedau AT igor2 DOT repo DOT hu> wrote:
> > Hi all,
> >
> > thanks for everyone who has answered the poll. I also appreciate the
> > effort of those who did not reply with off-topic stuff - the thread
> > did not derail and was kept clean.
> >
> > Results:
> >
> > TL;DR: there's no strong demand for blind/burried vias on pcb-rnd
> > side. This means I cancel my plans to support them. Mainline pcb may
> > benefit from the feature but the demand there is not as high as I
> > thought or as list traffic may have suggested lately.
> It is possible that all the users who need that functionality never
> adopted this toolchain or left. I doubt it but it is possible.
> Still I think you made the right call.
> > Regards,
> >
> > Igor2

If I can throw a toothpick into the water and row a bit, some of us do 
all our pcb's as onezies to sixzies, and even with good machine vision 
cameras, or time consuming to make and calibrate, fixed reference 
pallets to hold the board, we are still limited to 2 sided boards, 
multiple layers, other that glueing the finished boards together, are 
simply not feasible, so we don't try any of the stuff the board houses 
do as just part of the work flow. I can't even do plated thru holes.

What we need that I didn't find, is a pad menu that isn't tied to a 
specific part, but simply a list of pads we can lay down, listed by 
ID-OD style in the name of the pad. Dimensions in mils preferred.

Having a "pad-039-090" to put on the end of a trace where a wire to the 
outside world is to be soldered in, and that is easily found in the 
menu, would be a real advantage to folks like us.  Ditto for parts 
placement, the available footprints I found weren't the correct spacing, 
nor the correct lead hole sizes.  Had that stuff been easily found as 
single pads to be laid & snapped to the grid, I could have done that 6 
part project in half the pcb real estate it took. My experience at 
laying out pcb's goes back to the 60's at a tv station where we made a 
huge percentage of our own gear, so working with tape at 4x scale comes 
naturally to me. We also had a DEA etcher that made 5 minutes work out 
of making the board once it had been exposed and developed. So PCB to me 
is a new trick for a very old dog.  I made it work, but there were some 
surprises along the way.

The ability to edit all properties of a laid down and re-selected pad (or 
via) may have been there, but the "how" was not obvious.  Not helped by 
the fact that the help menu's first 3 selections were /dev/null 
operations. I still haven't grokked whats missing on these two systems 
that cause that failure. Nothing is logged.

Thanks for reading.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <>

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