[PCB_FORUM] Re: drill symbols

It was my understanding that the width and height is the dimension of
the text of the character
rather than the size of the hole which is defined on the layer tab.
 
Imagine a  board with a lot of plated thru .125 holes with  .125 drill
characters!
 
Shirley in Oregon

________________________________

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Dave Seymour
Sent: Monday, January 23, 2006 2:12 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: drill symbols


Let me re-word the 2nd paragraph.

This way the hole "figure" and the drill "size"are always the same, Now
you
have one to one correspondence and one would never run out
of figure combinations. 



Dave Seymour wrote:


        Gary,
        
        Set the figure as a circle that is the same size as the drill.
        
        Drill Dia = .062
        Figure = .062
        Character = P ( P= Plated, N = Non-Plated)
        width = .062
        height = .062
        
        This way the hole and the drill are always the same, Now you
        have one to one correspondence and one would never run out
        of figure combinations. 
        
        Side note: This is how in the old days I would get the drill
size to display,
        before the display button was added.
        
        In this electronic age, each of the vendors, techs, engineers I
work with has a copy
        of the Allegro viewer or a CAM tool. If anyone wants to "really"
know the
        diameter, then they hit the "information" button. 
        
        Hope this helps.
        Dave
        
        
        Gary MacIndoe wrote:
        

                Hey all,

                

                The padstacks in our library have a unique drill symbol
for each drill size (either a "Figure", a "Character" or

                a combination of the two).

                This is a "mature" library, and I'm starting to run out
of symbols with all of the odd drill sizes I'm adding lately.

                

                What do you do when all of the combinations are used up?
Anybody else have this problem?

                

                Thanks for a clue!

                

                Gary E. MacIndoe

                PCB Design Engineer

                Advanced Micro Devices

                Longmont, Colorado

                


        -- 
        Dave Seymour, CID+
        Catapult Communications Inc.
        800 Perimeter Park Dr, Suite A
        Morrisville, NC 27560
        
        Direct: (919)653-4249
        Main: (919)653-4180
        Fax: (919)653-4297
        
        Dave.seymour@xxxxxxxxxxxx
        
          


-- 
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560

Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297

Dave.seymour@xxxxxxxxxxxx

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