[PCB_FORUM] Re: Trying to find a specific drill size (via tovia)

  • From: Frank W <fworm@xxxxxxxxx>
  • To: icu-pcb-forum@xxxxxxxxxxxxx
  • Date: Wed, 16 Jun 2004 09:15:06 -0400

I'm sure the NC drill file has those locations
All 64 of them

Brian Alcock wrote:

Just to clarify for the need to find the X and Y location for a specific drill size.

I had 64 vias in pad (defined with a 9.5 drill to be easily identified by the board supplier) that had to be plated shut. The drill legend reported a quantity of 66 and I wanted to find the extra holes. With over 5000 vias on the board it makes it hard to find on the drill drawing. I could have changed the width and height of the drill symbol however it would have been nice to have a report with the seperate drill sizes and their x and y coordinates.

Brian

-----Original Message-----
From: westfeldt [mailto:westfeldt_nbcd@xxxxxxxxx]
Sent: Tuesday, June 15, 2004 8:05 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Trying to find a specific drill size (via to
via) 


microvias 1-2 and 7-8 will come out as drc if you don't have control over bb
stagger, which is a feature not available in PCB Design Studio.  Even though
the control is not there, the software(at least in 14.2) says there is a
stagger error because there is a built-in default of 5 mils minimum spacing.
So 1-2 and 7-8 vias colocated in xy space will get you a drc.  I think this
was true in all PCB Design Studio v13 and v14, don't know about v15.



-----Original Message-----
From: Gene Carman [mailto:gcarman@xxxxxxxxxxxxxxx]
Sent: Tuesday, June 15, 2004 5:04 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Trying to find a specific drill size (via to
via)


I ran into a bit of a issue with via to via... my DRC report
showed vias on top of vias that were actually quite separated...
vertically.  I had 1-2 micro vias above 7-8 microvias and these
came out as errors on the DRC report. That strikes me as a problem.

-----Original Message-----
From: Mitch S. Morey [mailto:cadpro2k@xxxxxxxxxx]
Sent: Tuesday, June 15, 2004 3:51 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Trying to find a specific drill size


Been reading the thread, and I still don't know why you need to create the
file. As many boards as I've done, I've never created it. Never needed
too. When you run DBCheck routine, does it show you duplicate hits on the
drill in question? It will if they are vias. What I do do now (since we
were hit with redundant drills) is create a simple script that changes my
constraints to look at 'same net' vias and will report if they less than 5
mils apart. Then I simply turn on all the layer DRCs and select them as
'info' and save the file as a text file. I search that for 'via to via'
spacings, and shows me ANY violations. Simple, quick, 'almost perfect'.

Did I miss something?

Good day.

Mitch



Thanks to all for your helpful info. Unless I missed something I still
can't believe that Allegro can't generate this nc_tools.txt file
automatically rather than the designer having to do this every time and
on every respin.

Tony Stanislao, Senior PCB Design Engineer
Pannaway Technologies | v: 603.766.5129| e: stanislao_t@xxxxxxxxxxxx
=========================================



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