[PCB_FORUM] Re: drill symbols

What is wrong with having 0.125" drill characters?

 

Tom
Arira Design, Inc.
408-844-8433 x112 

 

  _____  

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Bolman, Shirley H
Sent: Monday, January 23, 2006 3:03 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [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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