[PCB_FORUM] Re: drill symbols

We have had shops ask if the sizes in the chart are "drill sizes" or the
"finished hole sizes".... 
The default chart does say "DRILL SIZE"..... 
We modified the dlt file to specifically say "FINISHED HOLE SIZE"

 
________________________________

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
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-- 
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
<javascript:parent.ComposeTo('Dave.seymour@xxxxxxxxxxxx');> 
 
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